hog特征提取,空间描述 anna_PHOG Computes Pyramid Histogram of Oriented Gradient over a ROI.
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% [BH, BV] = anna_PHOG(I,BIN,ANGLE,L,ROI) computes phog descriptor over a ROI.
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% Given and image I, phog computes the Pyramid Histogram of Oriented Gradients
% over L pyramid levels and over a Region Of Interest
%IN:
% I - Images of size MxN (Color or Gray)
% bin - Number of bins on the histogram
% angle - 180 or 360
% L - number of pyramid levels
% roi - Region Of Interest (ytop,ybottom,xleft,xright)
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%OUT:
% p - pyramid histogram of oriented gradients