File size: 781 Bytes
d4035c1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | function feat = gb(conf, I)
if size(I,3) > 1
I = rgb2gray(I) ;
end
if ~ conf.usePBEdges
fbr = compute_channels_oe_nms(I) ;
else
feat = pbEdges(conf, I) ;
th = 4 * mod(feat.theta, pi) / pi ;
i = floor(th) ;
wi = 1 - (th - i) ;
j = i + 1 ;
wj = 1 - wi ;
i = mod(i,4) + 1 ;
j = mod(j,4) + 1 ;
fbr = zeros(size(I,1),size(I,2),4) ;
fbr=vl_binsum(fbr,wi .* feat.pb,i,3) ;
fbr=vl_binsum(fbr,wj .* feat.pb,j,3) ;
end
[descrs, frames] = get_descriptors(...
fbr, ...
conf.numFeats, ...
conf.repulsionRadius, ...
conf.blurRate, ...
conf.blurBase, ...
conf.sampleRadii, ...
conf.numSamplePerRadius) ;
frames = flipud(frames') ;
descrs = [ descrs(:,:,1) descrs(:,:,2) descrs(:,:,3) descrs(:,:,4)]' ;
feat.frames = frames ;
feat.descrs = descrs ;
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