Exploiting texture effects in dithering

Kenneth R. Sloan Jr.; Yun Wang

doi:10.1117/12.135963

27 August 1992 Exploiting texture effects in dithering

Kenneth R. Sloan Jr., Yun Wang

Proceedings Volume 1666, Human Vision, Visual Processing, and Digital Display III; (1992) https://doi.org/10.1117/12.135963
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

This paper presents a method of dithering which attempts to exploit the inevitable textures generated by all dithering schemes. We concentrate on rendering continuous tone (monochrome or color) image on a CRT display with a small number (on the order of 16 - 256) of distinct colors. Monochrome (especially bi-level) dithering techniques are well studied. We have previously demonstrated that texture introduced by the dithering process can significantly affect the appearance of the image. We then developed a scheme by which the user had some control over these texture effects. The primary tradeoff was between very fine grained textures which depend critically on the local gray level and relatively coarser, more obvious, textures which appear uniform across the entire image. In this paper we try to actively exploit the texture effects to enhance the appearance of the rendered image. The key idea is to use our previously described hybrid method (which combines ordered-dither with error diffusion) but to choose (locally) different ordered-dither matrices based on measured properties of the original image (e.g., the local gradient). We also show how to use anisotropic error diffusion to generate similar texture effects.

Citation Download Citation

Kenneth R. Sloan Jr. and Yun Wang "Exploiting texture effects in dithering", Proc. SPIE 1666, Human Vision, Visual Processing, and Digital Display III, (27 August 1992); https://doi.org/10.1117/12.135963

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