78 lines
2.7 KiB
Matlab
78 lines
2.7 KiB
Matlab
function [ responses ] = PatchResponseCCNF(patches, patch_experts_class, visibilities, patchExperts, window_size)
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%PATCHRESPONSESVM Summary of this function goes here
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% Detailed explanation goes here
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normalisationOptions = patchExperts.normalisationOptionsCol;
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patchSize = normalisationOptions.patchSize;
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responses = cell(size(patches, 1), 1);
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empty = zeros(window_size(1)-patchSize(1)+1, window_size(2)-patchSize(2)+1);
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for i = 1:numel(patches(:,1))
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responses{i} = empty;
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if visibilities(i)
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col_norm = normalisationOptions.useNormalisedCrossCorr == 1;
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b = zeros(numel(empty), 1);
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num_hl = size(patch_experts_class{i}.thetas,1);
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smallRegionVec = patches(i,:);
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smallRegion = reshape(smallRegionVec, window_size(1), window_size(2));
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for hls = 1:num_hl
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w = patch_experts_class{i}.w{hls};
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% normalisation needed per each response
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norm_w = patch_experts_class{i}.norm_w{hls};
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response = -norm_w * SVMresponse(smallRegion, w, col_norm, patchSize) - patch_experts_class{i}.thetas(hls, 1);
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% here we include the bias term as well, as it wasn't added
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% during the response calculation
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h1 = 1./(1 + exp(response(:)));
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b = b + (2 * patch_experts_class{i}.alphas(hls) * h1);
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end
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% Sigma will be dependent on the size of the patch find the
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% needed precomputed Sigma
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rel_sigma = 1;
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if(numel(patch_experts_class{i}.Sigma) > 1)
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for sig=1:numel(patch_experts_class{i}.Sigma)
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if(size(patch_experts_class{i}.Sigma{sig},2)==numel(b))
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rel_sigma = sig;
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break;
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end
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end
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end
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response = patch_experts_class{i}.Sigma{rel_sigma} * b;
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% make sure we have no negative responses
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response = response - min(response);
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responses{i}(:) = response;
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end
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end
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end
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function response = SVMresponse(region, patchExpert, normalise_x_corr,patchSize)
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if(normalise_x_corr)
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% the fast mex convolution
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[response] = normxcorr2_mex(patchExpert, region);
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response = response(patchSize(1):end-patchSize(1)+1,patchSize(2):end-patchSize(2)+1);
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else
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% this assumes that the patch is already normed
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template = rot90(patchExpert,2);
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response = conv2(region, template, 'valid');
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end
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end
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