VLLCVD Subjective Image Fidelity Criteria and Its Applications

摘要

Human eyes is often the final receiver of digital images, human visual system plays an important role in digital image processing. Three of the issues in image processing related to human visual perception are (1) Criteria for evaluation of image fidelity, (2) Definition of visually lossless image in image coding or invisible image in watermarking and (3) Criteria for evaluation of human visual models. Many criteria, such as SNR, PSNR, MSE etc., are available for the first issue, but these criteria have well-known drawbacks in reflecting the true perceived image quality. Even worse, criteria for the second and third problems are seldom heard. In this paper, we resolve the three problems simultaneously, under a unified and accurate subjective VLLCVD (Visually LossLess Critical Viewing Distance) criteria.