| Summary: | 碩士 === 國立臺灣大學 === 電機工程學系 === 85 === Anti-alias is an important topic in digital signal processing(
DIP), and in digital image processing(DIP), it comes out to
"jaggy" or "staircase" effect. The same result will occur when
we display Chinese characters. The alias makes we hard to
justify small Chinese characters, and strongly lower legibility
when we read an article. Therefore, if we want to display high
quality Chinese characters on cathode ray tubes(CRT), the man
task is to do anti-alias. This paper focuses on displaying small
Chinese characters on CRT: besides doing anti-alias to small
Chinese characters to generate gray scale characters, we adjust
the position and width of the strokes to generate high contrast
characters. So that we can display very clear and more legible
characters, and make reading small-Chinese-character-article
more comfortable. The order of procedure we propose are: obtain
the stroke contour, super-sampling, adjust the position and
width of strokes and fills them, filtering, sub sampling. We
also propose a set of gray scale specific hinting information
for Chinese characters.In adjusting position and width of
strokes, we use artificial, computing and hinting information
for bi-level character separately. In filtering, we had tried
box, conical and Gaussian filters. At last, we propose a set of
gray scale specific hinting information for Chinese characters.
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