Hierachical Dynamic Chinese Character Database Based On Global Affine Transformation

The technology of static computer Chinese fonts has developed from Bitmap type, Vetor type to Curve Contour type fonts. It has great improvement on the storage of Chinese fonts. The Curve Contour fonts, represented by the TTF of Microsoft and PostScript of Adobe, have excellent displaying effect. But the huge number of Chinese character limits the use of Chinese fonts.At present, the well-knowed Chinese fonts are static ones. They have the same shortage: they don't contain the written temporal information of Chinese characters and they can't display how to write Chinese characters correctly. The development of Dynamic Chinese Character Database (DCCD) is limited because of the huge number and variable fonts of Chinese characters.From this background, a new Hierarchical Dynamic Chinese Character Database (HDCCD) is constructed and implemented in this paper. The main works include:(1) Two kinds of component database, stroke database and radical database, is constructed. The radical database is rebuided based on the old radical database proposed in reference [7].(2) The method of splitting Chinese characters semiautomatically is proposed, when the radical database is changed.(3) Global Affine Transformation (GAT) is used to construct Hierarchical Chinese Character Database (HCCD). The application of GAT makes the construction of HCCD automatic. The specific expressions of affine transformation parameters are solved. The effect of different preprocessings to GAT, including skelecton, contour, feature points and barycenter, is explained by experiments.(4) Structural Similarity (SSIM) is applied to judge the effect of simulated Chinese characters. The judgement of SSIM is more objective and more efficient. The method for computing SSIM of binary images is proposed.(5) HDCCD is implemented by the application of HCCD technology on the DCCD. HDCCD makes the application of DCCD on the embeded system possible. (6) HDCCD including"KaiStyle_GB2312"and"FangSongStyle_GB2312"fonts, based on stroke and radical database, is implemented on Borland C++ Builder 6.HCCD can reduce the storage of Chinese graph database greatly by reusing components. GAT applied in this paper can construct HCCD automatically. The storage of DCCD is reduced largely by the application of HCCD technology. The work of this paper enhances the practicability of HDCCD.