A Study on Print Inspection Methods for Commercial Printing Presses based on "Comparison KIZKI Processing"

Abstract

In the commercial printing machine envisioned in this study, an electronic document is printed, and its image is captured by a built-in reader to detect defective parts (stains and irregularities) in the printed document. Basically, the inspection is a comparison between the submitted image and the printed image. However, the printed image contains geometric deformations and errors in density and color during reading, and the submitted image and the printed image will not match even if the printing is appropriate. To solve this problem, we proposed a new method of comparative inspection, which we call "Comparison KIZKI Processing". In experiments, we used a test chart and confirmed that we could detect small stains, streaks, and irregularities.