1 files changed, 14 insertions, 0 deletions

diff --git a/SD-VBS/common/toolbox/toolbox_basic/common/pair_dist.m b/SD-VBS/common/toolbox/toolbox_basic/common/pair_dist.m
new file mode 100755
index 0000000..3ea970a
--- /dev/null
+++ b/SD-VBS/common/toolbox/toolbox_basic/common/pair_dist.m
@@ -0,0 +1,14 @@
+function W  = pari_hist_dist_fast(data)
+%
+%  W  = pari_hist_dist(data)
+%
+%        data: num_im by num_feature 
+%        W  : num_im by num_im hist diff
+%
+
+[num_im,num_feature] = size(data);
+mag = sum(data.*data,2);
+
+W = mag(:,ones(1,num_im))  - 2*data*data';
+mag = mag';
+W = W+mag(ones(num_im,1),:);