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縱橫資訊科技語文發展中心

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CKC OCR (縱橫識字)

This tool designed by The Education University of Hong Kong (EdUHK) - CKC Centre for the Development of Information Technology in Chinese Language Teaching. Facilitate to search the CKC Code and learn of Chinese characters. For Example, if you search "為", all combinations for the CKC code (including code for variant Chinese character and instant code) will show: 000, 3, 34 and 3400.

CKC Chinese Input method is a type of appearance-based coding system. It encodes a Chinese character according to the stroke features of its 4 corners. The sequence is upper left corner, upper right corner, lower left corner and lower right corner (following the shape of the alphabet “Z”) respectively. 

The strokes and the features of the Chinese character components are classified into 10 groups, represented by 0 through 9.

0 A left-falling stroke or a stroke with left-turning (丿亅).
1 A horizontal stroke or a horizontal rising stroke written from left to right (丨).
2 A vertical stroke or a left slanting stroke (一).
3 A dot or a right-falling stroke (丶 乀).
4 A cross or the radical of “Grass” (十乂卄).
5 The combination of a falling stroke runs through 2 horizontal strokes (≠ キ).
6 A square (口).
7 A corner, 2 upper corners, 2 lower corners or a stroke with right-turning (乚).
8 The shape of the numeral “Eight”(八) in Chinese or its variants (人丷).
9 The shape of the Chinese character which means “Small” (小), its variants and the radical of “Upright Heart”(忄).

CKC OCR

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