3 research outputs found
Content-adaptive color transform for image compression
Cataloged from PDF version of article.In this paper, an adaptive color transform for image compression
is introduced. In each block of the image, coefficients of the color
transform are determined from the previously compressed neighboring
blocks using weighted sums of the RGB pixel values, making the transform
block-specific. There is no need to transmit or store the transform coeffi-
cients because they are estimated from previous blocks. The compression
efficiency of the transform is demonstrated using the JPEG image coding
scheme. In general, the suggested transformation results in better peak
signal-to-noise ratio (PSNR) values for a given compression level. ( C) 2011
Society of Photo-Optical Instrumentation Engineer