Advanced Image Sensing Systems
Advanced Image Sensing Systems
Before images and videos can be processed and analyzed, the necessary data must be recorded, enhanced, or reconstructed in a first step. For this purpose, the topics at the chair for image acquisition are collected in the first section. In particular, the acquisition and processing of hyperspectral data and the acquisition are discussed. By measuring spectral components, e.g., UV or IR, hidden information can be made visible to the human eye. If multiple cameras are used to record images and videos, also stereoscopic applications can be developed.
In the third section, the image reconstruction is examined in more detail. On the one hand, a new type of sensor concept (non-regular sampling) is presented and on the other hand, the resampling of images is discussed.
Finally, the last section focuses on image enhancement. In particular, the concealment and reconstruction of missing image areas is shown there.
Image acquisition
Hyperspectral Imaging
Contact |
Frank Sippel, M.Sc. |
E-Mail: frank.sippel@fau.de |
Link to person |
PD Dr.-Ing. habil. Jürgen Seiler |
E-Mail: juergen.seiler@fau.de |
Link to Person |
The acquisition of hyperspectral image data is becoming increasingly important for applications in image and video signal processing. For example, modern biometric security systems use hyperspectral recordings to verify the identity of people. Also in agriculture and medicine, new approaches are being published on an ongoing basis, in which, for example, hyperspectral images can be used to record the health status of plants and humans.
Among other things, we deal with innovative systems for recording hyperspectral images and videos at the chair. In addition, the reconstruction of hyperspectral data and its efficient coding are being investigated in detail. The following pictures show hidden information that can be made visible with the help of hyperspectral pictures (please click for enlarged view). The recording system and the associated algorithms were developed at the chair.
Spectral reconstruction
Contact |
Frank Sippel, M.Sc. |
E-Mail: frank.sippel@fau.de |
Link to person |
PD Dr.-Ing. habil. Jürgen Seiler |
E-Mail: juergen.seiler@fau.de |
Link to Person |
Using multi- or hyperspectral imaging system, as shown above, leads to further tasks. For a lot of applications, the reflectance spectra are an essential part for classification tasks. Therefore, reconstructing the emitted spectrum from multispectral images is a fundamental operation. This operation leads to several challenges. First of all, one typically estimates more variables than observations, which emphasizes the need for prior information. Furthermore, multispectral videos, e.g., imagine a drone flying over agricultural fields while measuring the plant health, are usually heavily affected by noise due to the limited exposure time of each frame. Consequently, spectral reconstruction techniques, which are robust to noise, need to be developed. The applications of such a technique vary heavily. For example, different types of plastic can be discriminated, drug counterfeits can be detected, or security features of bills can be examined:
Reconstructed spectra (the colors of markers and spectra match) | Reconstructed images at specific wavelengths |
Image reconstruction
Reconstruction of Non-Regularly Sampled Data
Contact |
Teresa Stürzenhofäcker, M.Sc. |
E-Mail: teresa.stuerzenhofaecker@fau.de |
Link to Person |
PD Dr.-Ing. habil. Jürgen Seiler |
E-Mail: juergen.seiler@fau.de |
Link to Person |
Using the frequency selective reconstruction (FSR), images can be reconstructed on the basis of a few, irregularly measured pixels. This is a task related to compressed sensing. Compared to regular sampling, there is reduced aliasing, which means that, after suitable reconstruction, a higher image quality is possible.
One possible application of irregular sampling is so-called 1/4 sampling. Here, a camera sensor with regularly placed pixels is partially masked, so that an irregular scanning pattern is created. Using a sparse representation, the FSR can be used to reconstruct a high-resolution image.
Example of the reconstruction of irregularly sampled image data with 1/4 sampling
To be able to test the performance of the frequency selective reconstruction, we provide the algorithm here as a GitLab project.
Image resampling
Contact |
Viktoria Heimann, M.Sc. |
E-Mail: viktoria.heimann@fau.de |
Link to person |
Digital images can be assumed to be regular two-dimensional grids of pixels. Transforming a digital image in any way, the pixel positions are transformed as well. Assuming an arbitrary image transform, pixels located on a regular integer grid before transform will be lying on arbitrary non-integer positions after transform. Pixel coordinates at arbitrary positions can neither be stored efficiently nor displayed on a digital screen. Therefore, image resampling is used to interpolate the scattered data onto a regular grid of pixel positions. We use Frequency-Selective Mesh-to-Grid Resampling (FSMR). As well as above-mentioned Frequency-Selective Reconstruction, FSMR takes advantage of spatially sparse matrices. Selecting and overlying suitable basis functions, an image can be resampled onto arbitrary positions and hence, can be displayed on a digital screen. FSMR can be used for affine and projective transforms, see the rotation below, for Super-Resolution, Frame-Rate Up-Conversion and many more.
Image enhancement
Error Concealment of Image Data
Contact |
Nils Genser, M.Sc. |
E-Mail: nils.genser@fau.de |
PD Dr.-Ing. habil. Jürgen Seiler |
E-Mail: juergen.seiler@fau.de |
Link to Person |
If images or video sequences are transmitted over wireless channels or the internet, the risk of transmission errors is ubiquitous. This results in the problem that individual regions cannot be decoded and displayed correctly. But it is possible to estimate these lost areas from the other correctly received regions. To achieve this, we developed the Selective Extrapolation. This algorithm is able to reconstruct arbitrary image contents and can be applied to images as well as video sequences.
Examples for concealment of distorted image data
Original image
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Distorted image
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Concealed image
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Image restauration by Selective Extrapolation
Besides concealment of distortions resulting from transmission errors, Selective Extrapolation can also be used for image restauration. In doing so, defects or disturbing objects can be removed from images. To achieve this, the regions to be extrapolated are marked manually in a first step. For this a binary mask with zero at the regions to replace is generated. Then, the image is divided into blocks and the 2D Selective Extrapolation is applied to all blocks that contain regions to be extrapolated.
Two examples for image restauration by Selective Extrapolation:
In order to evaluate the performance of the Selective Reconstruction yourself, we provide the algorithm here as a GitLab project.
2023
Image Super-Resolution Using T-Tetromino Pixels
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)
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Improving Spherical Image Resampling through Viewport-Adaptivity
IEEE International Conference on Image Processing (ICIP) (Kuala Lumpur, 8. October 2023 - 11. October 2023)
DOI: 10.1109/ICIP49359.2023.10222645
URL: https://arxiv.org/abs/2306.13692
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2022
Frequency-Selective Geometry Upsampling of Point Clouds
IEEE International Conference on Image Processing (ICIP) 2022 (Bordeaux, 16. October 2022 - 19. October 2022)
DOI: 10.1109/ICIP46576.2022.9897920
URL: https://arxiv.org/abs/2205.01458
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Resampling and Reconstructing Corrupted Images for Image Classification
IEEE International Workshop on Multimedia Signal Processing (Shanghai (virtually), 26. September 2022 - 28. September 2022)
URL: https://arxiv.org/abs/2210.15444
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2021
A Novel End-To-End Network for Reconstruction of Non-Regularly Sampled Image Data Using Locally Fully Connected Layers
23rd International Workshop on Multimedia Signal Processing (MMSP) (Tampere, Finland, 6. October 2021 - 8. October 2021)
DOI: 10.1109/MMSP53017.2021.9733541
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Novel Consistency Check for Fast Recursive Reconstruction of Non-Regularly Sampled Video Data
IEEE International Conference on Image Processing (ICIP) (Anchorage, 19. September 2021 - 22. September 2021)
DOI: 10.1109/icip42928.2021.9506567
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Frame Rate Up-Conversion Using Key Point Agnostic Frequency-Selective Mesh-to-Grid Resampling
IEEE International Conference on Acoustics, Speech and Signal Processing (Toronto (Virtual Conference), 6. June 2021 - 11. June 2021)
DOI: 10.1109/ICASSP39728.2021.9413684
URL: https://arxiv.org/abs/2210.10444
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Spatio-spectral Image Reconstruction Using Non-local Filtering
2021 IEEE International Conference on Visual Communications and Image Processing (VCIP) (München, 5. December 2021 - 8. December 2021)
DOI: 10.1109/VCIP53242.2021.9675421
URL: https://arxiv.org/pdf/2209.07890.pdf
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Hyperspectral Image Reconstruction from Multispectral Images Using Non-Local Filtering
23rd International Workshop on Multimedia Signal Processing (Tampere, 6. October 2021 - 8. October 2021)
DOI: 10.1109/MMSP53017.2021.9733655
URL: https://arxiv.org/pdf/2209.07891.pdf
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2020
Enhanced Image Reconstruction From Quarter Sampling Measurements Using an Adapted Very Deep Super Resolution Network
IEEE International Conference on Image Processing (ICIP) (Abu Dhabi (Virtual Conference), 25. October 2020 - 28. October 2020)
DOI: 10.1109/icip40778.2020.9191047
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Dynamic Image Sampling Using a Novel Variance Based Probability Mass Function
In: IEEE Transactions on Computational Imaging 6 (2020), p. 1440-1450
ISSN: 2333-9403
DOI: 10.1109/TCI.2020.3031077
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Boosting Compressed Sensing Using Local Measurements and Sliding Window Reconstruction
In: IEEE Transactions on Image Processing 29 (2020), p. 7931 - 7944
ISSN: 1057-7149
DOI: 10.1109/TIP.2020.3007822
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Key Point Agnostic Frequency-Selective Mesh-to-Grid Image Resampling using Spectral Weighting
IEEE International Workshop on Multimedia Signal Processing (MMSP) (Tampere (Virtual Conference), 21. September 2020 - 24. September 2020)
DOI: 10.1109/MMSP48831.2020.9287096
URL: https://arxiv.org/abs/2203.08086
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Real-Time Frequency Selective Reconstruction through Register-Based Argmax Calculation
IEEE International Workshop on Multimedia Signal Processing (MMSP) (Tampere, 21. September 2020 - 24. September 2020)
DOI: 10.1109/MMSP48831.2020.9287071
URL: https://arxiv.org/abs/2202.13926
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Structure-preserving spectral reflectance estimation using guided filtering
In: Journal of the Optical Society of America A-Optics Image Science and Vision 37 (2020), p. 1695-1710
ISSN: 1084-7529
DOI: 10.1364/JOSAA.400485
URL: https://arxiv.org/pdf/2209.07889.pdf
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2019
Joint Regression Modeling and Sparse Spatial Refinement for High-Quality Reconstruction of Distorted Color Images
IEEE International Conference on Image Processing (ICIP) (Taipei, 22. September 2019 - 25. September 2019)
DOI: 10.1109/icip.2019.8803567
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A Python-based Laboratory Course for Image and Video Signal Processing on Embedded Systems
In: Heliyon 5 (2019)
ISSN: 2405-8440
DOI: 10.1016/j.heliyon.2019.e02560
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Toward Bridging the Simulated-to-Real Gap: Benchmarking Super-Resolution on Real Data
In: IEEE Transactions on Pattern Analysis and Machine Intelligence 41 (2019)
ISSN: 0162-8828
DOI: 10.1109/TPAMI.2019.2917037
URL: https://www5.informatik.uni-erlangen.de/Forschung/Publikationen/2019/Koehler19-TBT.pdf
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Motion-Adapted Three-Dimensional Frequency Selective Extrapolation
IEEE International Conference on Acoustics, Speech, and Signal Processing (Brighton, UK, 12. May 2019 - 17. May 2019)
In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2019
DOI: 10.1109/ICASSP.2019.8683218
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2018
Motion Estimation for Fisheye Video with an Application to Temporal Resolution Enhancement
In: IEEE Transactions on Circuits and Systems For Video Technology (2018), p. 1-15
ISSN: 1051-8215
DOI: 10.1109/TCSVT.2018.2869546
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Sparse Hartley Modeling for Fast Image Extrapolation
IEEE 20th International Workshop on Multimedia Signal Processing (MMSP) (Vancouver, 29. August 2018 - 31. August 2018)
DOI: 10.1109/MMSP.2018.8547100
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Signal and Loss Geometry Aware Frequency Selective Extrapolation for Error Concealment
Picture Coding Symposium (PCS) (San Francisco, CA, 24. June 2018 - 27. June 2018)
DOI: 10.1109/pcs.2018.8456259
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Design Techniques for Incremental Non-Regular Image Sampling Patterns
IEEE International Conference on Imaging Systems and Techniques (IST) (Kraków, 16. October 2018 - 18. October 2018)
DOI: 10.1109/IST.2018.8577090
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Iterative Optimization of Quarter Sampling Masks for Non-Regular Sampling Sensors
25th IEEE International Conference on Image Processing (ICIP) (Athens, 7. October 2018 - 10. October 2018)
DOI: 10.1109/ICIP.2018.8451658
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Dynamic Non-Regular Sampling Sensor Using Frequency Selective Reconstruction
In: IEEE Transactions on Circuits and Systems For Video Technology (2018)
ISSN: 1051-8215
DOI: 10.1109/tcsvt.2018.2876653
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Color Channel Reconstruction for Multi-Color Multi-View Images Using Disparity and Color Similarity-based Local Linear Regression
IS&T Electronic Imaging - Image Sensors and Imaging Systems Conference (San Francisco, 28. January 2018 - 1. February 2018)
DOI: 10.2352/issn.2470-1173.2018.11.imse-292
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Increasing Imaging Resolution by Non-Regular Sampling and Joint Sparse Deconvolution and Extrapolation
In: IEEE Transactions on Circuits and Systems For Video Technology 29 (2018), p. 308-322
ISSN: 1051-8215
DOI: 10.1109/TCSVT.2018.2796725
URL: https://arxiv.org/abs/2204.12867
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Online decomposition of compressive streaming data using n-l1 cluster-weighted minimization
Data Compression Conference (Snowbird, Utah)
DOI: 10.1109/dcc.2018.00014
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Compressive online decomposition of dynamic signals via n-l1 minimization with clustered priors
IEEE Statistical Signal Processing Workshop (Freiburg)
DOI: 10.1109/ssp.2018.8450742
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Sparse Signal Recovery with Multiple Prior Information: Algorithm and Measurement Bounds
In: Signal Processing 152 (2018), p. 417-428
ISSN: 0165-1684
DOI: 10.1016/j.sigpro.2018.06.019
URL: https://www.sciencedirect.com/science/article/pii/S0165168418302160
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Compressive Online Robust Principal Component Analysis via n - ℓ1 Minimization
In: IEEE Transactions on Image Processing 27 (2018), p. 4314-4329
ISSN: 1057-7149
DOI: 10.1109/TIP.2018.2831915
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2017
Motion Compensated Frame Rate Up-Conversion Using 3D Frequency Selective Extrapolation and a Multi-Layer Consistency Check
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (New Orleans, LA, 5. March 2017 - 9. March 2017)
DOI: 10.1109/ICASSP.2017.7952397
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Disparity Estimation for Fisheye Images with an Application to Intermediate View Synthesis
IEEE International Workshop on Multimedia Signal Processing (MMSP) (London-Luton, UK, 16. October 2017 - 18. October 2017)
In: IEEE International Workshop on Multimedia Signal Processing (MMSP) 2017
DOI: 10.1109/MMSP.2017.8122251
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Demonstration of Rapid Frequency Selective Reconstruction for Image Resolution Enhancement
IEEE International Conference on Image Processing (ICIP) (Beijing, 17. September 2017 - 20. September 2017)
DOI: 10.1109/ICIP.2017.8297158
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Local Statistics Estimation For Rapid Frequency Selective Extrapolation
International Conference on Systems, Signals and Image Processing (IWSSIP) (Poznań, 22. May 2017 - 24. May 2017)
DOI: 10.1109/IWSSIP.2017.7965575
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Scaled Fixed-Point Frequency Selective Extrapolation for Fast Image Error Concealment
IEEE International Conference on Image Processing (ICIP) (Beijing, 17. September 2017 - 20. September 2017)
DOI: 10.1109/ICIP.2017.8296649
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Iterative Denoising-Based Mesh-to-Grid Reconstruction with Hyperparametric Adaptation
IEEE International Workshop on Multimedia Signal Processing (London-Luton, 16. October 2017 - 18. October 2017)
DOI: 10.1109/MMSP.2017.8122288
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Frequency Selective Mesh-to-Grid Resampling for Image Communication
In: IEEE Transactions on Multimedia 19 (2017), p. 1689-1701
ISSN: 1520-9210
DOI: 10.1109/TMM.2017.2683267
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Scalable Kernel-Based Minimum Mean Square Error Estimator for Accelerated Image Error Concealment
In: IEEE Transactions on Broadcasting 63 (2017), p. 59-70
ISSN: 0018-9316
DOI: 10.1109/TBC.2016.2619581
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Super-resolution for differently exposed mixed-resolution multi-view images adapted by a histogram matching method
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (New Orleans, LA, 5. March 2017 - 9. March 2017)
DOI: 10.1109/ICASSP.2017.7952511
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Sequential Polarization Imaging Using Multi-View Fusion
IEEE International Workshop on Signal Processing Systems (SiPS) (Lorient, 3. October 2017 - 5. October 2017)
DOI: 10.1109/SiPS.2017.8110019
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RFVTM: A Recovery and Filtering Vertex Trichotomy Matching for Remote Sensing Image Registration
In: IEEE Transactions on Geoscience and Remote Sensing 55 (2017), p. 375-391
ISSN: 0196-2892
DOI: 10.1109/TGRS.2016.2606899
URL: http://ieeexplore.ieee.org/document/7579178/
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Compressive Online Robust Principal Component Analysis with Multiple Prior Information
IEEE Global Conference on Signal and Information Processing (GlobalSIP) (Montreal, 14. November 2017 - 16. November 2017)
DOI: 10.1109/GlobalSIP.2017.8309163
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2016
Multi-Image Super-Resolution Using a Dual Weighting Scheme Based on Voronoi Tessellation
IEEE International Conference on Image Processing (ICIP) (Phoenix, AZ, 25. September 2016 - 28. September 2016)
DOI: 10.1109/ICIP.2016.7532874
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Multi-Image Super-Resolution for Fisheye Video Sequences Using Subpixel Motion Estimation Based on Calibrated Re-Projection
European Signal Processing Conference (EUSIPCO) (Budapest, 29. August 2016 - 2. September 2016)
DOI: 10.1109/EUSIPCO.2016.7760573
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Multi-Image Super-Resolution Using a Locally Adaptive Denoising-Based Refinement
IEEE 18th International Workshop on Multimedia Signal Processing (MMSP) (Montreal, 21. September 2016 - 23. September 2016)
DOI: 10.1109/MMSP.2016.7813343
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Joint Shape and Centroid Adaptive Frequency Selective Extrapolation for the Reconstruction of Arbitrarily Shaped Loss Areas
Picture Coding Symposium (PCS) (Nuremberg, 4. December 2016 - 7. December 2016)
In: Picture Coding Symposium 2016
DOI: 10.1109/PCS.2016.7906367
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Motion Estimation for Fisheye Video Sequences Combining Perspective Projection with Camera Calibration Information
IEEE International Conference on Image Processing (Phoenix, Arizona, 24. September 2016 - 27. September 2016)
In: IEEE (ed.): Proceedings of the IEEE International Conference on Image Processing 2016
DOI: 10.1109/ICIP.2016.7533210
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A Data Set Providing Synthetic and Real-World Fisheye Video Sequences
IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) (Shanghai, 20. March 2016 - 25. March 2016)
In: IEEE (ed.): Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2016
DOI: 10.1109/ICASSP.2016.7471935
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Recursive Frequency Selective Reconstruction of Non-Regularly Sampled Video Data
Picture Coding Symposium (PCS) (Nuremberg, 4. December 2016 - 7. December 2016)
DOI: 10.1109/PCS.2016.7906325
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Texture-Dependent Frequency Selective Reconstruction of Non-Regularly Sampled Images
Picture Coding Symposium (PCS) (Nuremberg, 4. December 2016 - 7. December 2016)
In: Picture Coding Symposium (2016) 2016
DOI: 10.1109/PCS.2016.7906355
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Reliability-based Mesh-to-Grid Image Reconstruction
IEEE 18th Workshop on Multimedia Signal Processing (MMSP) (Montreal, 21. September 2016 - 23. September 2016)
In: IEEE Workshop on Multimedia Signal Processing (MMSP) 2016
DOI: 10.1109/MMSP.2016.7813344
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Multi-mode kernel-based minimum mean square error estimator for accelerated image error concealment
Data Compression Conference (DCC) (Snowbird, UT, 30. March 2016 - 1. April 2016)
In: Data Compression Conference (DCC) 2016
DOI: 10.1109/DCC.2016.55
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Robust Super-Resolution for Mixed-Resolution Multiview Image plus Depth Data
In: IEEE Transactions on Circuits and Systems For Video Technology 26 (2016), p. 814-828
ISSN: 1051-8215
DOI: 10.1109/TCSVT.2015.2426498
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Adaptive Frequency Prior for Frequency Selective Reconstruction of Images from Non-Regular Subsampling
IEEE 18th Workshop on Multimedia Signal Processing (MMSP) (Montreal, 21. September 2016 - 23. September 2016)
In: IEEE Workshop on Multimedia Signal Processing (MMSP), Montreal, Canada: 2016
DOI: 10.1109/MMSP.2016.7813347
URL: https://arxiv.org/pdf/2207.06797.pdf
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Distributed Parallel Image Signal Extrapolation Framework using Message Passing Interface
24th European Signal Processing Conference (EUSIPCO) (Budapest, 29. August 2016 - 2. September 2016)
In: European Signal Processing Conf. (EUSIPCO), Budapest, Ungarn: 2016
DOI: 10.1109/EUSIPCO.2016.7760214
URL: https://arxiv.org/abs/2207.00238
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Optimized Processing Order for 3D Hole Filling in Video Sequences Using Frequency Selective Extrapolation
Picture Coding Symposium (PCS) (Nuremberg, 4. December 2016 - 7. December 2016)
In: Picture Coding Symposium (PCS), Nuremberg, Germany: 2016
DOI: 10.1109/PCS.2016.7906329
URL: https://arxiv.org/abs/2207.09737
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A flexible mixed-signal image processing pipeline using 3D chip stacks
In: Journal of Real-Time Image Processing 14 (2016), p. 517-534
ISSN: 1861-8200
DOI: 10.1007/s11554-016-0628-5
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Distributed Coding of Multiview Sparse Sources with Joint Recovery
DOI: 10.1109/PCS.2016.7906382
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A Reconstruction Algorithm with Multiple Side Information for Distributed Compression of Sparse Sources
Data Compression Conference (Snowbird, 30. March 2016 - 1. April 2016)
In: Data Compression Conference (DCC) 2016
DOI: 10.1109/DCC.2016.95
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Sparse Signal Reconstruction with Multiple Side Information using Adaptive Weights for Multiview Sources
IEEE International Conference on Image Processing (ICIP) (Phoenix, AZ, 25. September 2016 - 28. September 2016)
In: IEEE Int. Conf. on Image Processing (ICIP), Phoenix, AZ, USA: 2016
DOI: 10.1109/ICIP.2016.7532816
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2015
Hybrid Super-Resolution Combining Example-Based Single-Image and Interpolation-Based Multi-Image Reconstruction Approaches
2015 IEEE International Conference on Image Processing (ICIP) (Quebec City, 27. September 2015 - 30. September 2015)
DOI: 10.1109/ICIP.2015.7350759
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A Hybrid Motion Estimation Technique for Fisheye Video Sequences Based on Equisolid Re-Projection
IEEE International Conference on Image Processing (ICIP) (Québec City, 27. September 2015 - 30. September 2015)
In: Proc. of IEEE Internationl Conference on Image Processing (ICIP) 2015
DOI: 10.1109/ICIP.2015.7351468
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Temporal Error Concealment for Fisheye Video Sequences Based on Equisolid Re-Projection
23rd European Signal Processing Conference (EUSIPCO) (Nice, 31. August 2015 - 4. September 2015)
In: Proc. of European Signal Processing Conference (EUSIPCO) 2015
DOI: 10.1109/EUSIPCO.2015.7362656
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Reconstruction of Videos Taken by a Non-Regular Sampling Sensor
IEEE International Conference on Visual Communications and Image Processing (VCIP) (Singapur, 13. December 2015 - 16. December 2015)
DOI: 10.1109/VCIP.2015.7457801
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Denoising-based image reconstruction from pixels located at non-integer positions
IEEE International Conference on Image Processing, ICIP 2015 (Québec City, 27. September 2015 - 30. September 2015)
DOI: 10.1109/ICIP.2015.7351671
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Super-Resolution for Mixed-Resolution Multiview Images Using a Relative Frequency Response Estimation Method
IEEE International Conference on Visual Communications and Image Processing (VCIP) (Singapore, 13. December 2015 - 16. December 2015)
DOI: 10.1109/VCIP.2015.7457827
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Combining single-image and multiview super-resolution for mixed-resolution image plus depth data
23rd European Signal Processing Conference, EUSIPCO 2015 (Nice, 31. August 2015 - 4. September 2015)
DOI: 10.1109/EUSIPCO.2015.7362702
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Super-Resolution for Mixed-Resolution Multiview Image plus Depth Data using a Novel Two-Stage High-Frequency Extrapolation Method for Occluded Areas
2015 IEEE International Conference on Image Processing (ICIP) (Quebec City, 27. September 2015 - 30. September 2015)
DOI: 10.1109/ICIP.2015.7351127
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Centroid adapted frequency selective extrapolation for reconstruction of lost image areas
IEEE International Conference on Visual Communications and Image Processing (VCIP) (Singapore, 13. December 2015 - 16. December 2015)
DOI: 10.1109/VCIP.2015.7457805
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Resampling Images to a Regular Grid from a Non-Regular Subset of Pixel Positions Using Frequency Selective Reconstruction
In: IEEE Transactions on Image Processing 24 (2015), p. 4540-4555
ISSN: 1057-7149
DOI: 10.1109/TIP.2015.2463084
URL: https://arxiv.org/abs/2204.12873
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Concept for a CMOS Image Sensor Suited for Analog Image Pre-Processing
Friday Workshop on Heterogeneous Architectures and Design Methods for Embedded Image Systems (Grenoble, 13. March 2015 - 13. March 2015)
In: DATE Friday Workshop on Heterogeneous Architectures and Design Methods for Embedded Image Systems 2015
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2014
Accelerated Hybrid Image Reconstruction for Non-Regular Sampling Color Sensors
IEEE International Conference on Visual Communications and Image Processing (VCIP) (Valletta, 7. December 2014 - 10. December 2014)
DOI: 10.1109/VCIP.2014.7051543
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High Dynamic Range Video Reconstruction from a Stereo Camera Setup
In: Signal Processing-Image Communication 29 (2014), p. 191-202
ISSN: 0923-5965
DOI: 10.1016/j.image.2013.08.016
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, , , , , :
Declipping of Speech Signals Using Frequency Selective Extrapolation
11. ITG Conference on Speech Communication (Erlangen, 24. September 2014 - 26. September 2014)
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, , :
Reconstruction of Images Taken by a Pair of Non-Regular Sampling Sensors Using Correlation Based Matching
IEEE International Conference on Image Processing (ICIP) (Paris, 27. October 2014 - 30. October 2014)
DOI: 10.1109/ICIP.2014.7025582
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, , , , :
Reducing Randomness of Non-Regular Sampling Masks for Image Reconstruction
IEEE International Conference on Visual Communications and Image Processing (VCIP) (Valletta, 7. December 2014 - 10. December 2014)
DOI: 10.1109/VCIP.2014.7051555
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, , , :
Cost-effective multi-camera array for high quality video with very high dynamic range
Digital Photography X (San Francisco, CA, 2. February 2014 - 6. February 2014)
DOI: 10.1117/12.2039563
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, , , , , , , :
An error-based recursive filling ordering for image error concealment
IEEE International Conference on Image Processing (ICIP) (Paris, 27. October 2014 - 30. October 2014)
DOI: 10.1109/ICIP.2014.7025509
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, , , , :
Frequency selective extrapolation with residual filtering for image error concealment
2014 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2014 (Florence, 4. May 2014 - 9. May 2014)
DOI: 10.1109/ICASSP.2014.6853944
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, , , , :
Reconstruction of multiview images taken with non-regular sampling sensors
2014 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2014 (Florence, 4. May 2014 - 9. May 2014)
DOI: 10.1109/ICASSP.2014.6854713
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, , , :
2013
Improving block-based compensated wavelet lifting by reconstructing unconnected pixels
2013 International Symposium on Signals, Circuits and Systems, ISSCS 2013 (Iasi, 11. July 2013 - 12. July 2013)
DOI: 10.1109/ISSCS.2013.6651186
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, , :
Evaluation of a high dynamic range video camera with non-regular sensor
SPIE Electronic Imaging - Digital Photography IX (San Francisco, 3. February 2013 - 7. February 2013)
DOI: 10.1117/12.2004258
URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1568617
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, , , , , , , :
Spatio-temporal error concealment in video by denoised temporal extrapolation refinement
2013 20th IEEE International Conference on Image Processing, ICIP 2013 (Melbourne, 15. September 2013 - 18. September 2013)
DOI: 10.1109/ICIP.2013.6738332
URL: https://arxiv.org/abs/2207.03774
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, , :
2012
Multiview Super-Resolution Using High-Frequency Synthesis in Case of Temporally Subsampled Depth Information
2012 IEEE Visual Communications and Image Processing, VCIP 2012 (San Diego, CA, 27. November 2012 - 30. November 2012)
DOI: 10.1109/VCIP.2012.6410742
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Mixed-resolution view synthesis using non-local means refined image merging
SPIE Electronic Imaging 2012 - Stereoscopic Displays and Applications XXIII (San Francisco, 22. January 2012 - 26. January 2012)
DOI: 10.1117/12.906552
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, , , , :
Robust super-resolution in a multiview setup based on refined high-frequency synthesis
2012 IEEE 14th International Workshop on Multimedia Signal Processing, MMSP 2012 (Banff, AB, 17. September 2012 - 19. September 2012)
DOI: 10.1109/MMSP.2012.6343407
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, , , :
Building a High Dynamic Range Video sensor with spatially non-regular optical filtering
Applications of Digital Image Processing XXXV (San Diego, CA, 12. August 2012)
DOI: 10.1117/12.928858
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, , , , , :
High dynamic range video by spatially non-regular optical filtering
2012 19th IEEE International Conference on Image Processing, ICIP 2012 (Lake Buena Vista, FL, 30. September 2012 - 3. October 2012)
DOI: 10.1109/ICIP.2012.6467470
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, , , , :
Photometric limits for digital camera systems
In: Journal of Electronic Imaging 21 (2012), Article No.: 020501
ISSN: 1560-229X
DOI: 10.1117/1.JEI.21.2.020501
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, , , :
Defect pixel interpolation for lossy compression of camera raw data
SPIE Electronic Imaging - Visual Information Processing and Communication II (San Francisco, CA, 24. January 2012 - 26. January 2012)
DOI: 10.1117/12.907910
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, , , , :
Auflösungserhöhung durch nichtregelmäßige Abtastung
In: Fachzeitschrift für Fernsehen, Film und elektronische Medien 4 (2012), p. 202-205
ISSN: 1430-9947
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, , , :
Edge modeling prediction for computed tomography images
2012 IEEE Visual Communications and Image Processing, VCIP 2012 (San Diego, California, 27. November 2012 - 30. November 2012)
DOI: 10.1109/VCIP.2012.6410795
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, , , :
2011
Color constancy and non-uniform illumination: Can existing algorithms work?
2011 IEEE International Conference on Computer Vision Workshops, ICCV Workshops 2011 (Barcelona, 6. November 2011 - 13. November 2011)
DOI: 10.1109/ICCVW.2011.6130331
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, , , , , , :
Moving refractive optical low-pass filter for digital cameras
SPIE Electronic Imaging - Digital Photography VII (San Francisco, CA, 24. January 2011 - 25. January 2011)
DOI: 10.1117/12.872402
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, , , , :
Analysis of Processing Pipelines in Digital RAW Cameras
In: A. Heuberger, G. Elst, R. Hanke (ed.): Microelectronic Systems: Circuits, Systems and Applications, Heidelberg: Springer, 2011, p. 281-293
ISBN: 978-3-642-23071-4
DOI: 10.1007/978-3-642-23071-4_27
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, , , :
Increasing camera dynamic range through in-sensor multi-exposure white balancing
2011 18th IEEE International Conference on Image Processing, ICIP 2011 (Brussels, 11. September 2011 - 14. September 2011)
DOI: 10.1109/ICIP.2011.6116340
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, , , :
Increasing imaging resolution by covering your sensor
2011 18th IEEE International Conference on Image Processing, ICIP 2011 (Brussels, 11. September 2011 - 14. September 2011)
DOI: 10.1109/ICIP.2011.6115839
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, , , :
Sparsity-based defect pixel compensation for arbitrary camera raw images
36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 (Prague, 22. May 2011 - 27. May 2011)
DOI: 10.1109/ICASSP.2011.5946639
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, , , , :
Signal Extrapolation Using Sparse Representations and its Applications in Video Communication (Dissertation, 2011)
URL: http://www.dr.hut-verlag.de/9783843902373.html
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Optimized and parallelized processing order for improved frequency selective signal extrapolation
19th European Signal Processing Conference, EUSIPCO 2011 (Barcelona, 30. August 2011 - 2. September 2011)
URL: https://eurasip.org/Proceedings/Eusipco/Eusipco2011/papers/1569415587.pdf
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A fast algorithm for selective signal extrapolation with arbitrary basis functions
In: EURASIP Journal on Advances in Signal Processing 2011 (2011), Article No.: 495394
ISSN: 1687-6172
DOI: 10.1155/2011/495394
URL: https://arxiv.org/abs/2204.14194
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Motion Compensated Three-Dimensional Frequency Selective Extrapolation for improved error concealment in video communication
In: Journal of Visual Communication and Image Representation 22 (2011), p. 213-225
ISSN: 1047-3203
DOI: 10.1016/j.jvcir.2010.11.006
URL: https://arxiv.org/abs/2204.12882
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Performance evaluation of feature-based image alignment techniques for inter-sequence error concealment
2011 14th ITG Conference on Electronic Media Technology, CEMT 2011 (Dortmund, 23. March 2011 - 24. March 2010)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79960690775∨igin=inward
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, , :
Temporal adaptation strategies for spatio-temporal image alignment in inter-sequence error concealment of digital TV
2011 18th IEEE International Conference on Image Processing, ICIP 2011 (Brussels, 11. September 2011 - 14. September 2011)
DOI: 10.1109/ICIP.2011.6116074
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Difference image extrapolation for spectral completion in inter-sequence error concealment
36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 (Prague, 22. May 2011 - 27. May 2011)
DOI: 10.1109/ICASSP.2011.5946607
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2010
Fixed pattern noise column drift compensation (CDC) for digital moving picture cameras
2010 17th IEEE International Conference on Image Processing, ICIP 2010 (Hong Kong, 27. September 2010 - 29. September 2010)
DOI: 10.1109/ICIP.2010.5652732
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, , :
Change detection in JPEG 2000 compressed video
In: Electronics Letters 46 (2010), p. 409-410
ISSN: 0013-5194
DOI: 10.1049/el.2010.2945
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, , , , :
Digital neutral density filter for moving picture cameras
Computational Imaging VIII (San Jose, CA, 17. January 2010 - 21. January 2010)
DOI: 10.1117/12.838833
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, , , , :
Dynamikerweiterung durch Weißabgleich im Bildsensor
16. Farbworkshop der German Color Group (Ilmenau, 7. October 2010 - 8. October 2010)
In: 16. Farbworkshop der German Color Group, Ilmenau, Ilmenau: 2010
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, , , :
Dimensioning of optical birefringent anti-alias filters for digital cameras
2010 17th IEEE International Conference on Image Processing, ICIP 2010 (Hong Kong, 26. September 2010 - 29. September 2010)
DOI: 10.1109/ICIP.2010.5651784
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, , , , :
Content-Adaptive Motion Compensated Frequency Selective Extrapolation for error concealment in video communication
2010 17th IEEE International Conference on Image Processing, ICIP 2010 (Hong Kong, 26. September 2010 - 29. September 2010)
DOI: 10.1109/ICIP.2010.5651851
URL: https://arxiv.org/abs/2207.03770
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Complex-valued frequency selective extrapolation for fast image and video signal extrapolation
In: IEEE Signal Processing Letters 17 (2010), p. 949-952
ISSN: 1070-9908
DOI: 10.1109/LSP.2010.2078504
URL: https://arxiv.org/abs/2204.14193
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Improved mode selection in hybrid error concealment for multi-broadcast-reception
2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010 (Paris, 30. May 2010 - 2. June 2010)
In: Proceedings of 2010 IEEE International Symposium on Circuits and Systems 2010
DOI: 10.1109/ISCAS.2010.5537785
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, , , :
Fast and robust spatio-temporal image alignment for inter-sequence error concealment
2010 17th IEEE International Conference on Image Processing, ICIP 2010 (Hong Kong, 26. September 2010 - 29. September 2010)
DOI: 10.1109/ICIP.2010.5654241
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Spatially refined inter-sequence error concealment for a multi-broadcast receiver using frequency selective approximation
18th ACM International Conference on Multimedia ACM Multimedia 2010, MM'10 (Florence, 25. October 2010 - 29. October 2010)
DOI: 10.1145/1873951.1874187
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, , :
2009
Modeling of image shutters and motion blur in analog and digital camera systems
2009 IEEE International Conference on Image Processing, ICIP 2009 (Cairo, 7. November 2009 - 10. November 2009)
DOI: 10.1109/ICIP.2009.5413842
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, , , :
Non-linear dark current fixed pattern noise compensation for variable frame rate moving picture cameras
17th European Signal Processing Conference, EUSIPCO 2009 (Glasgow, 24. August 2009 - 28. August 2009)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863770259∨igin=inward
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, , , , :
Multiple Selection Extrapolation for Spatial Error Concealment
2009 IEEE International Workshop on Multimedia Signal Processing, MMSP '09 (Rio De Janeiro, 5. October 2009 - 7. October 2009)
DOI: 10.1109/MMSP.2009.5293572
URL: https://arxiv.org/abs/2207.06795
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Low-complexity inter-sequence error concealment based on scale-invariant feature transform
2009 IEEE International Workshop on Multimedia Signal Processing, MMSP '09 (Rio De Janeiro, 5. October 2009 - 7. October 2009)
DOI: 10.1109/MMSP.2009.5293321
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, , , :
Fehlerverschleierung digitaler Fernsehbildsignale bei mobilem Mehrfachempfang
ITG Fachtagung für Elektronische Medien (Dortmund, 17. March 2009 - 18. March 2009)
In: ITG Fachtagung für Elektronische Medien, Dortmund, Deutschland: 2009
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, , , :
Inter-Sequence Error Concealment for Diversity Reception of TV Sequences
17th European Signal Processing Conference, EUSIPCO 2009 (Glasgow, 24. August 2009 - 28. August 2009)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863743782∨igin=inward
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, , , :
Joint Temporal and Inter-Sequence Error Concealment for Multi-Broadcast-Reception
10th Workshop Digital Broadcasting (Ilmenau, 16. September 2009 - 17. September 2009)
URL: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.150.8436&rep=rep1&type=pdf
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, , , :
2008
Histogram-based prefiltering for luminance and chrominance compensation of multiview video
In: IEEE Transactions on Circuits and Systems For Video Technology 18 (2008), p. 1258-1267
ISSN: 1051-8215
DOI: 10.1109/TCSVT.2008.926997
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, , :
4-D frequency selective extrapolation for error concealment in multi-view video
2008 IEEE 10th Workshop on Multimedia Signal Processing, MMSP 2008 (Cairns, QLD, 25. October 2008 - 10. October 2008)
DOI: 10.1109/MMSP.2008.4665087
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, , :
Motion compensated frequency selective extrapolation for error concealment in video coding
16th European Signal Processing Conference, EUSIPCO 2008 (Lausanne, 25. August 2008 - 29. August 2008)
URL: https://www.eurasip.org/Proceedings/Eusipco/Eusipco2008/papers/1569101578.pdf
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, :
Adaptive joint spatio-temporal error concealment for video communication
2008 IEEE 10th Workshop on Multimedia Signal Processing, MMSP 2008 (Cairns, QLD, 8. October 2008 - 10. October 2008)
DOI: 10.1109/MMSP.2008.4665080
URL: https://arxiv.org/pdf/2207.06794.pdf
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Fast orthogonality deficiency compensation for improved frequency selective image extrapolation
2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP (Las Vegas, NV, 31. March 2008 - 4. April 2008)
DOI: 10.1109/ICASSP.2008.4517726
URL: https://arxiv.org/abs/2207.01205
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Image-Based Synchronization in Mobile TV for a Multi-Broadcast-Receiver
9th Workshop Digital Broadcasting (Tennenlohe, 18. September 2008 - 19. September 2008)
URL: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.142.127&rep=rep1&type=pdf
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, , , :
2007
Time-Constant Histogram Matching for Luminance and Chrominance Compensation of Multi-View Video Sequences
26th Picture Coding Symposium, PCS 2007 (Lisbon, 7. November 2007 - 9. November 2007)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84898069089∨igin=inward
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, , :
Fading Techniques for Error Concealment in Block-Based Decoding Systems
In: IEEE Transactions on Broadcasting 53 (2007), p. 286-296
ISSN: 0018-9316
DOI: 10.1109/TBC.2006.889688
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Spatio-temporal defect pixel interpolation using 3-D frequency selective extrapolation
14th IEEE International Conference on Image Processing, ICIP 2007 (San Antonio, Texas, 16. September 2007 - 19. September 2007)
DOI: 10.1109/ICIP.2007.4379976
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, , :
Spatiotemporal selective extrapolation for 3-D signals and its applications in video communications
In: IEEE Transactions on Image Processing 16 (2007), p. 2348-2360
ISSN: 1057-7149
DOI: 10.1109/TIP.2007.903261
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Orthogonality Deficiency Compensation for Improved Frequency Selective Image Extrapolation
Picture Coding Symposium (Lisbon, 7. November 2007 - 9. November 2007)
URL: http://www.eurasip.org/Proceedings/Ext/PCS2007/defevent/papers/cr1064.pdf
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, , :
2006
Spatio-temporal fading scheme for error concealment in block-based video decoding systems
2006 IEEE International Conference on Image Processing, ICIP 2006 (Atlanta, GA, 8. November 2006 - 11. October 2006)
DOI: 10.1109/ICIP.2006.312807
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, :
Spatio-bi-temporal error concealment in block-based video decoding systems
2006 IEEE 8th Workshop on Multimedia Signal Processing, MMSP 2006 (Victoria, BC, 3. October 2006 - 6. October 2006)
DOI: 10.1109/MMSP.2006.285317
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3D-deblocking for error concealment in block-based video decoding systems
25th PCS: Picture Coding Symposium 2006, PCS2006 (Peking, 24. April 2006 - 26. April 2006)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34047182556∨igin=inward
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, :
2D frequency selective extrapolation for spatial error concealment in H.264/AVC video coding
2006 IEEE International Conference on Image Processing, ICIP 2006 (Atlanta, GA, 8. October 2006 - 11. October 2006)
DOI: 10.1109/ICIP.2006.313014
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, :
Spatio-temporal selective extrapolation for 3-D signals applied to concealment in video communications
14th European Signal Processing Conference, EUSIPCO 2006 (Florence, 4. September 2006 - 8. September 2006)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84862605608&origin=inward
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, , :
2005
Signalnachverarbeitung zur Qualitätsverbesserung von mobil empfangenen analogen Videodaten
Elektronische Medien: 11. Dortmunder Fernsehseminar, ITG-Fachbericht 188
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, :
Low complexity streak noise reduction for mobile TV using line selective interpolation of field information
IEEE International Conference on Image Processing 2005, ICIP 2005 (Genova, 11. September 2005 - 14. September 2005)
DOI: 10.1109/ICIP.2005.1530394
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, :
Low complexity two classes Gauss weighting filter for noise reduction in mobile received analog TV signals
13th European Signal Processing Conference, EUSIPCO 2005 (Antalya, 4. September 2005 - 8. September 2005)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863649764&origin=inward
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, :
Frequency selective signal extrapolation with applications to error concealment in image communication
In: AEÜ - International Journal of Electronics and Communications 59 (2005), p. 147-156
ISSN: 1434-8411
DOI: 10.1016/j.aeue.2005.03.015
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, , :
Automatische TV-Logo-Entfernung durch statistische modellbasierte Detektion und frequenzselektive Kompensation
Elektronische Medien: 11. Dortmunder Fernsehseminar, ITG-Fachbericht 188 (Dortmund, 26. September 2005 - 28. September 2005)
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, , , :
Automatic TV logo removal using statistical based logo detection and frequency selective inpainting
13th European Signal Processing Conference, EUSIPCO 2005 (Antalya, 4. September 2005 - 8. September 2005)
URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863673242∨igin=inward
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, , , :
2004
Spatial error concealment of corrupted image data using frequency selective extrapolation
IEEE International Conference on Acoustics, Speech, and Signal Processing (Montreal, Que, 17. May 2004 - 21. May 2004)
DOI: 10.1109/ICASSP.2004.1326518
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, :
Minimizing a weighted error criterion for spatial error concealment of missing image data
2004 International Conference on Image Processing, ICIP 2004 (Singapore, 24. October 2004 - 27. October 2004)
DOI: 10.1109/ICIP.2004.1419422
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2003
Örtliche Fehlerverschleierung von gestört empfangenen Bilddaten durch frequenzselektive Extrapolation
Elektronische Medien: 10. Dortmunder Fernsehseminar, ITG-Fachbericht 179
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, :
2000
Error Concealment for SNR Scalable Video Coding in Wireless Communication
Visual Communications and Image Processing 2000, SPIE (Perth, 20. June 2000 - 23. June 2000)
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:
Image Restoration for Frame- and Object-Based Video Coding Using an Adaptive Constrained Least Squares Approach
In: Signal Processing 80 (2000), p. 2337-2345
ISSN: 0165-1684
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:
1998
Coding of Segmented Images Using Shape-Independent Basis Functions
In: IEEE Transactions on Image Processing 7 (1998), p. 937-947
ISSN: 1057-7149
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, :
1997
Shape Initialisation of 3-D objects in Videoconference Scenes
Stereoscopic Displays and Virtual Reality Systems IV, SPIE (San José, 11. February 1997 - 14. February 1997)
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, :