ドット式表示装置による濃淡図形表示の方法

概要

論文の詳細を見る
Binary dot output devices are widely used to display characters and line drawings. A number of techniques have been developed to display halftone pictures on such devices. Two problems arise when the number of dots per one picture cell is small. One is quantizing contours and the other is moire pattern. The former is solved by adding noise before quantization and the latter is removed by preparing several micropatterns which is randomly assigned for each level. This Paper presents a technique which regards the brightness value as a probability of white dots and solves the two problems at the same time. The results show that the picture of good quality can be obtained using only 2×2 dots per one picture cell and the size of each cell may be reduced to 1 dot, if "improved gray scale" technique is applicable. The technique is easy to implement requiring relatively small memory.
一般社団法人情報処理学会の論文
1974-07-15