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。
方向余弦
direction cosine
暂无补充释义。
相关例句
相关词条
in the direction of
grain direction【纸】
direction non-equilibrium factor of passenger flow【交】
cephalocaudal direction
controlling for stock travelling otherwise than in the direction of the material
direction of public opinion
reversal of rotational direction (reversal of rotation)
aircraft control according to attitude, altitude, flight direction