Halftone color prints: dot gain and modeling of color distributions

Mikael Wedin; Bjoern Kruse

doi:10.1117/12.207593

27 April 1995 Halftone color prints: dot gain and modeling of color distributions

Mikael Wedin, Bjoern Kruse

Proceedings Volume 2413, Color Hard Copy and Graphic Arts IV; (1995) https://doi.org/10.1117/12.207593
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

The properties of the total printing transfer function are studied using halftone test prints and automatic analysis of the acquired data. a method for determining the dot gain, both physical and optical, based on the colorimetric properties of the halftone dots is presented. To estimate the physical dot gain the method identifies the ink and discriminates between the different colors and the paper using normalized color distributions for each printing ink. The color distribution idea is based on the fact that between the colorimetric centers of gravity (in CIELAB color coordinates), the possible colors of the print are almost one dimensionally distributed. This has been established through three dimensional visualizations of the color gamut for different printers and also for news print. In this approach a simulation how light is scattered in the paper is used to complement the measurement of optical dot gain. Using digital image processing and data modeling through Singular Value Decomposition, properties of the color distributions for halftone prints are identified. The properties are identified by examining the basis functions corresponding to the largest singular values. Links to the physical properties of the ink and the paper are discussed.

Citation Download Citation

Mikael Wedin and Bjoern Kruse "Halftone color prints: dot gain and modeling of color distributions", Proc. SPIE 2413, Color Hard Copy and Graphic Arts IV, (27 April 1995); https://doi.org/10.1117/12.207593

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