An Optimal Tchebichef Moment Quantization using Psychovisual Threshold for Image Compression

The human eye has limited sensitivity to receive the visual information. The colour images possess a certain amount of perceptual redundancy 1 . The human visual system describes the way of human eye’s process toward image and how to relays it to the brain. By taking the advantages of some human eye’s properties, data redundancy can be removed without seriously degrading the image quality. In general, the human eye is more sensitive to luminance component of the image. The human eye has a non-linier response toward the drastic changes in intensity level and likely to be processed in different frequency channels 2 . The objective of this research is to develop quantitative measures that can automatically predict perceptual image quality 3 . In general, a psychovisual model has been designed based on our understanding of brain theory and neuroscience 4 , which is used to determine a threshold of human visual system’s sensitivity.