open source pkg v1

pkg/OpenFace/matlab_version/CCNF/sparsity_grid.m

@@ -0,0 +1,21 @@
+function [ SparsityMatrix ] = sparsity_grid( x, side, width, width_end)
+%SIMILARITYNEIGHBOR Summary of this function goes here
+%   Detailed explanation goes here
+
+    % this assumes that the patch is laid out with first column, then second
+    % column, ... final column (column major)
+
+    SimilarityMatrix = zeros(side*side);
+    for i=1:width
+        SimilarityMatrix = (similarity_neighbor_grid_further(x, side, [1,2,3,4], i) | SimilarityMatrix);
+    end
+    
+    SimilarityMatrix_end = zeros(side*side);
+    for i=1:width_end
+        SimilarityMatrix_end = (similarity_neighbor_grid_further(x, side, [1,2,3,4], i) | SimilarityMatrix_end);
+    end
+    
+    SparsityMatrix = double(SimilarityMatrix_end & (~SimilarityMatrix));
+    
+    assert(isequal(SparsityMatrix, SparsityMatrix'));
+end