指纹纹线检出大多是先按指纹方向图增强指纹图象，然后进行图象分割。
Most of the fingerprint detection is first to enhance a fingerprint image referring to the fingerprint orientation, then to segment the fingerprint image.
在深入研究EZW和MRWD方法基础上，提出了一种结合指纹方向图的指纹压缩算法。
We propose a fingerprint coding algorithm based on directional image, EZW and MRWD algorithm.
为此，提出一种直接按指纹梯度矢量的方向图进行指纹特征检出的算法。
For this reason, the authors propose a method to detect fingerprint features directly fr om the fingerprint gradient orientations.
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