The Research On The Key Technologies For Weaved Photograph CAD

This dissertation investigates the general problem of reproducing color images on an offsetweaving press using custom yarns in any combination and number. Many mathematical and algorithmic challenges arise when printing with inks other than the standard process colors (cyan, magenta, yellow, and black), particularly as the number of inks increases.These challenges include the development of gamut mapping strategies, efficient yarn selections trategies. and robustmethods for computing color separations in situations that may be either overconstrained or underconstrained. In addition, the demands of high-quality color printing require an accurate physical model of the colors that result from overprinting multiple inks using halftoning, including the effects of dot gain, and the interreflection of light between ink layers. As we explore these issues, we present new algorithms and physical models that together comprise a system capable of choosing optimal inks for an image and generating the appropriate color separations. Finally. we present some printed examples demonstrating the promise of our techniques.●We modify existing models of weave layering and color halftoning.●We introduce a gamut mapping algorithm that is parameterized to effectively fill a gap between two predominant strategies in the literature.●We describe how stochastic combinatorial optimization methods (simulated annealing and genetic algorithms) can be modified to find the papers and inks well-suited to reproducing a given image.●We develop a robust multiresolution algorithm that, given any combination of inks, computes separations that are as smooth as the input image.●Finally, we develop a general interactive CAD structure using design pattern.