The sub-bands are coded and the information of direction cosine is used for iris matching, by means of which this method overcomes zoom, shift and illuminance and obtains approving effect.

• 将分解后子带作为特征编码，利用空间向量的方向夹角余弦作为匹配方法，有效克服了缩放、平移、光照等影响，达到了较好的识别效果。