Luminance-model-based DCT quantization for color image compression  (1992)

A model is developed to approximate visibility thresholds for discrete cosine transform (DCT) coefficient quantization error based on the peak-to-peak luminance of the error image. Experimentally measured visibility thresholds for R, G, and B DCT basis functions can be predicted by a simple luminance-based detection model. This model allows DCT coefficient quantization matrices to be designed for display conditions other than those of the experimental measurements: other display luminances, other veiling luminances, and other spatial frequencies (different pixel spacings, viewing distances, and aspect ratios).

+ Watson, Andrew

+ Ahumada, Albert

+ Peterson, Heidi

+ Vision Science and Technology

color, compression, DCT, image, Luminance-model-based, quantization

SPIE Proceedings, 1666, 365-374