一种利用分形压缩指纹图象的方法

Fingerprint Image Compress Method Based on Fractal Model

提出一种改进的分形压缩方法。该方法首先将指纹图象小块内的数据沿纹理方向进行重新排列，形成一维数据，然后再进行一维分形数据压缩编码。实验结果证明了该方法可以提高图象压缩比和恢复质量。最后给出一种消除块效应的方法。

Because fingerprint image is composed of strip, it is difficult to increase compress ratio by tranditional fractal compress method based on block IFS. A new fractal compress method is presented. At first the image block data is formed into a serial data according to the direction of the strip. And then the data is coded by fractal image compress method in one dimension. The theory analysis and experiment results show that this approch can increase image compress ratio and improve the quality of the recovered image. At last a method to eliminate the block effect based on direction filte is presented.