用于指纹识别，对已经细化的指纹图像提取中心点。基于方向变化最大熵，提取指纹中心点。提取的中心点位置较精确。-for fingerprint identification, has been refined to the fingerprint images from center. Based on changes in the direction of maximum entropy, fingerprints center. Ext

用于指纹识别，对已经细化的指纹图像提取中心点。基于方向变化最大熵，提取指纹中心点。提取的中心点位置较精确。-for fingerprint identification, has been refined to the fingerprint images from center. Based on changes in the direction of maximum entropy, fingerprints center. Ext