invariant moments of image
phi = invmoments(F)
F为读取的图像矩阵，phi中保存了7个hu不变矩
% Copyright 2002-2004 R. C. Gonzalez, R. E. Woods, & S. L. Eddins
% Digital Image Processing Using MATLAB, Prentice-Hall, 2004
% $Revision: 1.5 $ $Date: 2003/11/21 14:39:19 $
2019-12-21 18:57:50
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