Matlab版HOG代码
function F = hogcalculator(img, cellpw, cellph, nblockw, nblockh,...
nthet, overlap, isglobalinterpolate, issigned, normmethod)
% HOGCALCULATOR calculate R-HOG feature vector of an input image using the % procedure prented in Dalal and Triggs's paper in CVPR 2005.
%
% Author: timeHandle
% Time: March 24, 2010
% May 12,2010 update.
%
% this copy of code is written for my personal interest, which is an 山药肉饼
% original and inornate realization of [Dalal CVPR2005]'s algorithm
% without any optimization. I just want to check whether I understand
% the algorithm really or not, and also do some practices for knowing
% matlab programming more well becau I could be called as 'novice'.
% OpenCV 2.0 has realized Dalal's HOG algorithm which runs faster
% than mine without any doubt, ╮(╯▽╰)╭. Ronan pointed a error in
% the code,thanks for his correction. Note that at the end of this
% code, there are some demonstration code,plea remove in your work. 黄岗
%
月饼的英语% F = hogcalculator(img, cellpw, cellph, nblockw, nblockh,
% nthet, overlap, isglobalinterpolate, issigned, normmethod)
%
% IMG:
% IMG is the input image. 新医改
%
% CELLPW, CELLPH:
% CELLPW and CELLPH are cell's pixel width and height respectively.
%
% NBLOCKW, NBLCOKH:
% NBLOCKW and NBLCOKH are block size counted by cells number in x and % y directions respectively.
%
% NTHET, ISSIGNED:
% NTHET is the number of the bins of the histogram of oriented
% gradient. The histogram of oriented gradient ranges from 0 to pi in
% 'unsigned' condition while to 2*pi in 'signed' condition, which can
% be specified through tting the value of the variable ISSIGNED by
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% the string 'unsigned' or 'signed'.
%
% OVERLAP:
% OVERLAP is the overlap proportion of two neighboring block.
%
% ISGLOBALINTERPOLATE:
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% ISGLOBALINTERPOLATE specifies whether the trilinear interpolation % is done in a single global 3d histogram of the whole detecting 最美村官
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% window by the string 'globalinterpolate' or in each local 3d
% histogram corresponding to respective blocks by the string
% 'localinterpolate' which is in strict accordance with the procedure
% propod in Dalal's paper. Interpolating in the whole detecting
% window requires the block's sliding step to be an integral multiple
% of cell's width and height becau the histogram is fixing before
% interpolate. In fact here the so called 'global interpolation' is
% a notation given by mylf. at first the spatial interpolation is
% done without any relevant to block's slide position, but when I was
