基于HOG算子的特征提取方法的MATLAB仿真，matlab2021a测试。 for j=1:ny%行 for i=1:nx%列 Ltop=G(((j-1)*n+1):j*n,((i-1)*n+1):i*n);%%左上cell Lbottom=G((j*n+1):(j+1)*n,((i-1)*n+1):i*n);%%左下cell Rtop=G(((j-1)*n+1):j*n,(i*n+1):(i+1)*n);%%右上cell Rbottom=G((j*n+1):(j+1)*n,(i*n+1):(i+1)*n);%%右下cell，四个cell组成一个block pltop=anna_phog(Ltop,9,180); plbottom=anna_phog(Lbottom,9,180); prtop=anna_phog(Rtop,9,180); prbottom=anna_phog(Rbottom,9,180);