[Paper] Extended Joint Bilateral Filter for the Reduction of Color Bleeding in Compressed Image and Video

Abstract

In this paper, we propose a simple and effective technique, named extended joint bilateral filter, for reducing color bleeding which is defined as a smearing of the color between areas of strongly contrasting chroma in lossy-compressed images. The color bleeding comes from not only quantization but also sub-sampling in the YCbCr 4:2:0 color format. In order to deal with the two problems simultaneously, we extend the joint bilateral filter formulation by referring all of Y, Cb and Cr components based on a correlation between luma and chroma. As a result, our method achieves both noise reduction and sharpness enhancement for chroma without color edge blurring. Experimental results show that our method is effective in terms of both objective quality and subjective quality.

Decomposed Multilateral Filtering for Accelerating Filtering with Multiple Guidance Images

“…Joint edge-preserving filtering helps transfer major characteristics from guidance images, which are not filtering images themselves. Various applications use the filters, including flash/no-flash photography [ 16 , 17 ], up-sampling/super resolution [ 18 ], compression noise removal [ 19 ], alpha matting [ 20 ], haze removing [ 21 ], rain removing [ 22 ], depth refinement [ 23 , 24 ], stereo matching [ 25 , 26 ], and optical flow estimation [ 27 ].…”