基于哈日日食的角点检测程序，使用ZNCC进行匹配-yet the solar eclipse on the corner detection, the use of matching ZNCC

ZNCC Normalized cross correlation m = zncc(w1, w2) Compute the zero-mean normalized cross-correlation between the two equally sized image patches w1 and w2. Result is in the range -1 to 1, with 1 indicating identical pixel patterns.-ZN