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題 名 | A Data Compression Scheme for Chinese Character Patterns=中文字形之壓縮 |
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作 者 | 賴榮滄; 廖華政; | 書刊名 | 中國工程學刊 |
卷 期 | 20:4 1997.07[民86.07] |
頁 次 | 頁389-399 |
分類號 | 312.74 |
關鍵詞 | 資料壓縮; 中文字體; 線段; 內插; Data compression; Chinese characters; Line-segment; Interpolation; |
語 文 | 英文(English) |
中文摘要 | 本論文提出一個有效的無失真中文字形壓縮方法。此種方法分析中文字形的特性 以便在壓縮和解壓縮的過程中能做線段預測。此種無失真的壓縮法,其壓縮比約為 0.25bits/pixel。此外我們一發展出一失真的壓縮方法。此種失真的壓縮法能再提高約42% 的壓縮效果。 |
英文摘要 | This paper presents an efficient lossless compression scheme for Chinese character patterns. The scheme analyzes the characteristics of line-segment structures of Chinese character patterns. .A novel matching algorithm is developed for the line-segment prediction which is used in the encoding and decoding processes. The bit rates achieved with the proposed lossless scheme are 0.265 3, 0.2448 and 0.2583 bits per pixel, for three Chinese fonts, respectively. Because the black and white points in Chinese character patterns are highly correlated, subsampling and interpolation schemes are considered to further increase the compression ratio. With these schemes, the low bit rates are achieved. Compared to the available algorithm, our approach gives better performance. Two types of interpolation techniques are presented for the enlargement of Chinese character patterns. They are the 2-D interpolation and spline interpolation. Compared with the lossless com- pression scheme, the 2-D subsampling scheme can further reduce the bit rates as high as 43.19%, 41.83%, and 41.61% for three widely used Chinese fonts, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。