@INPROCEEDINGS{1466Verhack2014, AUTHOR = {Ruben Verhack and Andreas Krutz and Peter Lambert and Rik Van de Walle and Thomas Sikora}, TITLE = {[Top 10% Paper] LOSSY IMAGE CODING IN THE PIXEL DOMAIN USING A SPARSE STEERING KERNEL SYNTHESIS APPROACH}, BOOKTITLE = {21th IEEE International Conference on Image Processing}, YEAR = {2014}, MONTH = oct, PAGES = {4807--4811}, ADDRESS = {Paris,France}, NOTE = {ISBN: 978-1-4799-5750-7}, PDF = {http://elvera.nue.tu-berlin.de/files/1466Verhack2014.pdf}, ABSTRACT = {Kernel regression has been proven successful for image de- noising, deblocking and reconstruction. These techniques lay the foundation for new image coding opportunities. In this pa- per, we introduce a novel compression scheme: Sparse Steer- ing Kernel Synthesis Coding (SSKSC). This pre- and post- processor for JPEG performs non-uniform sampling based on the smoothness of an image, and reconstructs the miss- ing pixels using adaptive kernel regression. At the same time, the kernel regression reduces the blocking artifacts from the JPEG coding. Crucial to this technique is that non-uniform sampling is performed while maintaining only a small over- head for signalization. Compared to JPEG, SSKSC achieves a compression gain for low bits-per-pixel regions of 50% or more for PSNR and SSIM. A PSNR gain is typically in the 0.0 - 0.5 bpp range, and an SSIM gain can mostly be achieved in the 0.0 - 1.0 bpp range.} }