--- a
+++ b/matlab/highlight.m
@@ -0,0 +1,22 @@
+function out = highlight(image_file, csv_file)
+
+% load image and csv files
+A = imread(image_file);
+M = csvread(csv_file);
+for i=1:3
+    B(:,:,i) = rgb2gray(A);
+end
+[p, q] = size(M);
+for i=1:p
+    for j=1:q/2
+        if M(i,2*j) ~= 0
+            col = M(i,2*j-1);
+            row = M(i,2*j);
+            B(row,col) = A(row,col);
+        end
+    end
+end
+
+out = B;
+
+end
\ No newline at end of file