Abstract

To evaluate print characteristics on the basis of scanned microsamples of printing sheets, it is necessary to carry out the segmentation of particular colour regions, printed with process inks. The accuracy of the evaluation of print characteristics strongly depends on the successful segmentation of the colour regions involved in a print sample. The first step of segmentation must be the separation of the specific colour from a multicolour sample. This paper describes the method of colour separation based on the evaluation of differences between the colours involved in the print sample. The result of the separation process is a monochromatic image, which is further processed by segmentation methods to gain accurate regions of specific colour or regions of halftone dots.

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