pGBbBShift - Perceptual Generalized Bitplane-by-Bitplane Shift

Abstract

Abstract-The paper we present pGBbBShift. This algorithm permits to code any Region of Interest (ROI) in a perceptual way, i.e. the presented algorithm introduces some characteristics of the HumanVisual System. Furthermore, it introduces features of chromatic induction to the GBbBShift method when bitplanes of ROI and background areas are coded. Thus, the included features balance visual importance of some pixels regardless their numerical importance, namely we avoid to use Information Theory criteria. Visual criteria are applied using the CIWaM, which is contrast band-pass filter that predicts color perception. pGBbBShift is compared against classicalROI algorithms, such as the MaxShift method of JPEG2000 and results show that there is no perceptual difference. pGBbBShift method is an open algorithm that can be applied in any wavelet based image coder such as JPEG2000, SPIHT or SPECK. Finally, we applied pGBbBShift to Hi-SET coder and we obtain the best results when the overall visual image quality is assessed Keywords-Image Coding; JPEG2000; Hi-SET; region of interest(ROI); bitplane coding; wavelet coding; maximum shift (MaxShift);bitplane-by-bitplane shift (BbBShift); generalized bitplane-by-bitplane shift (GBbBShift)