Principal features of human vision in the context of image qualitymodels

摘要

The amount of data involved in digital picture processing providesa challenge even for nowadays sophisticated computer hardware, incomputational speed as well as in storage capacity required. However,modern communication and office automation concepts substantially relyon the idea of an extensive availability of picture processing andtransmission facilities. Reduced resolution of signal dimensions andappropriate coding schemes thus are inevitable prerequisites of such adevelopment. Optimal adjustment of this reduction procedures requires anappropriate measure of image quality. Common S/N measures, however, showonly weak correlation with the judgements of human observers. Models ofhuman vision that are applicable to the prediction of subjective picturequality therefore play an important role in an optimal use of resourcesin future technological developments