Merge: Hog feature extraction Added

histogramGrayscale.m

+%Returns histogram in grayscale
+function [out] = histogramGrayscale(image)
+    %image ideally is already grayscaled rbg2gray() if needed
+    
+    [x,y] = size(image);
+    out = zeros(1,255);
+    
+    for i = 1:x
+        for j = 1:y
+            pixel = image(i,j);
+            if pixel ~= 0
+                out(pixel) = out(pixel)+1;
+            end
+        end
+    end
+end
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