Objective Print Quality Evaluation - Based on Information Theory.

Reproduction and printing processes can be defined asinformation-processing systems as these are understood in information theory. With the mathematical-statistical relationships derivable from information theory, a quality factor q for information transmission can be deduced, thus giving an objective printing quality statement related to the original. The practical relevance of this quality factor has been proved with the help of psychophysical experiments. In this way, it is possible to objectively test the transmission quality of reproduction and printing processes and their sub-processes as well as the transmission quality of the apparatus, machines and materials used. These tests are also of particular interest for the assessment of new processes in which information is stored and transmitted immaterially to some extent (ink jet, scanner techniques, modern composition techniques), since traditional visual and also measuring methods (testing forms etc.) can no longer be used. giving an objective printing quality statement related to the original. The practical relevance of this quality factor has been proved with the help of psychophysical experiments. In this way, it is possible to objectively test the transmission quality of reproduction and printing processes and their sub-processes as well as the transmission quality of the apparatus, machines and materials used. These tests are also of particular interest for the assessment of new processes in which information is stored and transmitted immaterially to some extent (ink jet, scanner techniques, modern composition techniques), since traditional visual and also measuring methods (testing forms etc.) can no longer be used.