matlab - HOG 特征 MATLAB 可视化代码

Question

我在这里找到了How are HoG features represented graphically?可视化 HOG 特征的代码；它由 http://www.cs.berkeley.edu/~rbg/latent/index.html 中的 2 个文件完成, 可视化HOG.m 和HOGpicture.m 即(以下代码是在 MIT 许可证下发布的)

function im = HOGpicture(w, bs)
% Make picture of positive HOG weights.
%   im = HOGpicture(w, bs)

% construct a "glyph" for each orientation
bim1 = zeros(bs, bs);
bim1(:,round(bs/2):round(bs/2)+1) = 1;
bim = zeros([size(bim1) 9]);
bim(:,:,1) = bim1;
for i = 2:9,
  bim(:,:,i) = imrotate(bim1, -(i-1)*20, 'crop');
end

% make pictures of positive weights bs adding up weighted glyphs
s = size(w);    
w(w < 0) = 0;    
im = zeros(bs*s(1), bs*s(2));
for i = 1:s(1),
 iis = (i-1)*bs+1:i*bs;
 for j = 1:s(2),
    jjs = (j-1)*bs+1:j*bs;          
   for k = 1:9,
     im(iis,jjs) = im(iis,jjs) + bim(:,:,k) * w(i,j,k);
  end
 end
end

我不明白什么是 bs 参数以及什么意思..anycan 可以帮助我吗？

Answer 1

如果您正在寻找可视化 HOG，可以在这里查看，http://web.mit.edu/vondrick/ihog/#code

最近发表在iccv 2013