PERCEPTUAL IMAGE QUALITY: CONCEPT AND MEASUREMENT
Jaj Jacques Roufs · TU/e Research Portal · 1992
The concept of perceptual image quality and its measurements are discussed. A distinction is made between appreciation-oriented and performance-oriented quality. It is argued that in both cases psychometrical scaling is a very important method with respect to the measurement of perceptual quality and the strength of its dimensions and therefore is indispensable if one wants to relate these attributes to the physical image parameters. Scaled perceptual image quality and its validity are discussed in connection with physical image parameters such as size, gamma and spatial resolution. Scaled subjective impairments caused by quantisation errors are also dealt with. Finally, an example of scaled visual comfort and its relation with a few objective performance measures isgiven. It is concluded that the effectof inter-subject differences is of lessconcern than the effects of different scenes.