| 基于方向信息的指纹图象分形压缩 |
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| 引用本文： | 卓晴,王文渊.基于方向信息的指纹图象分形压缩[J].清华大学学报(自然科学版),1998(9). |
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| 作者姓名： | 卓晴 王文渊 |
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| 作者单位： | 清华大学自动化系 |
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| 摘 要： | 提出了一种根据指纹图象方向信息进行图象压缩的方法。首先，将指纹图象按照其纹理方向信息进行分块，将同一块内的图象数据沿纹理方向排列成一维数据，然后再用分形压缩编码方法进行压缩。该法很好地解决了分形图象压缩算法在处理指纹图象时的局限性，具有很高的压缩效率和编码速度、较小的图象恢复误差，并可对指纹图象进行修复等优点。最后给出了实验结果，证实了该方法的优越性能。
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| 关 键 词： | 指纹图象 图象压缩 分形 方向图 |
Fingerprint fractal compression based on direction information |
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| ZHUO Qing,WANG Wenyuan.Fingerprint fractal compression based on direction information[J].Journal of Tsinghua University(Science and Technology),1998(9). |
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| Authors: | ZHUO Qing WANG Wenyuan |
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| Institution: | ZHUO Qing,WANG Wenyuan Department of Automation,Tsinghua University,Beijing 100084,China |
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| Abstract: | Fingerprint is one of the important information in identification. It has practicable meaning to compress fingerprint in storage. This paper presents a new image compression method based on fingerprint direction information. At first divide fingerprint into several blocks according to their direction, and then arrange each block image data into a serial data. Using fractal compression to encode the one dimension data. This method solves the difficulty of fractal image compression. It achieves a high compress ratio and encode speed, low distortion of recover image. Experiment result shows the advantage of the new method. |
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