Perceptual notion of scale for halftone representations: nonlinear diffusion

Wei Qian; Benjamin B. Kimia

doi:10.1117/12.320139

17 July 1998 Perceptual notion of scale for halftone representations: nonlinear diffusion

Wei Qian, Benjamin B. Kimia

Proceedings Volume 3299, Human Vision and Electronic Imaging III; (1998) https://doi.org/10.1117/12.320139
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

It has been shown that incorporating a model of human visual system in the form of filtering halftone errors by the eye's Modulation Transfer Function improves the quality of generated halftones. However, in addition to the effect induced by the blurring of the eye, the human visual system constructs abstract, multi-scale representations of the images it perceives in the form of a coarse-fine representation where the coarser levels are augmented by increasingly finer levels of detail. Such abstract representations can be quite different from coarser representation generated by a linear Gaussian convolution filter which blurs the image while removing small features. In this paper we employ a nonlinear system of partial differential equations to construct a perceptually meaningful scale-space of coarse to fine representations of an image and require that the multi-scale structure of a halftone to approximate that of the original image. This is implemented via a scale-based error metric and optimization by simulate annealing. The improvements are demonstrated on a few images.

Citation Download Citation

Wei Qian and Benjamin B. Kimia "Perceptual notion of scale for halftone representations: nonlinear diffusion", Proc. SPIE 3299, Human Vision and Electronic Imaging III, (17 July 1998); https://doi.org/10.1117/12.320139

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