Fundamentals of digital image processing
Fundamentals of digital image processing
Introduction to statistical pattern recognition (2nd ed.)
Introduction to statistical pattern recognition (2nd ed.)
Discrete cosine transform: algorithms, advantages, applications
Discrete cosine transform: algorithms, advantages, applications
The JPEG still picture compression standard
Communications of the ACM - Special issue on digital multimedia systems
Overview of the p×64 kbit/s video coding standard
Communications of the ACM - Special issue on digital multimedia systems
Techniques and standards for image, video, and audio coding
Techniques and standards for image, video, and audio coding
Subband Image Coding
Transform Coding of Images
Digital Image Processing
A perceptually tuned subband image coder based on the measure of just-noticeable-distortion profile
IEEE Transactions on Circuits and Systems for Video Technology
A perceptually optimized 3-D subband codec for video communication over wireless channels
IEEE Transactions on Circuits and Systems for Video Technology
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In this paper, we propose perceptual activity measures, which are computed from weighted transforms of the block, to precisely estimate the sensitivity of blocks. From analysis of principal components of a referred background region, we first suggest a weighted Karhunen-Loeve transformation (KLT) activity measure to characterize the visual variation of the image block. The weighted KLT computed in block-by-block fashions requires large computational complexity. To reduce the computation, we further utilize the first-order Markov's model and discrete cosine transform (DCT) to derive a simplified perceptual activity measure. Simulated results show that the proposed measures achieving precise visual perception can be effectively utilized in many block-based image and video compression systems.