ABSTRACT
While one often thinks of electronic imaging or scanned imaging as a digital process, this chapter is concerned with the imaging equivalent of analog to digital (A/D) and digital to analog (D/A) processes. The basic equations used to derive the chromaticity diagram and to transform it provide an introduction to color image quality measurement. To a certain extent, gray information can be readily exchanged for scan frequency. The chapter subsequently explores this further when dealing with the subject of information content of an imaging system. To understand and evaluate binary images, a few new concepts are explored and appropriate analytic methods developed. Unlike the work dealing with the photographic image, the assumption of uniform isotropic performance cannot be used to simplify the notation to radial units. Additional processing to meet user preferences or to enable some particular application of the image must also be considered a part of the image quality evaluation.
