Add image overlap problem

dotfiles/lib/python/image_overlap.py

@@ -0,0 +1,37 @@
+class Solution(object):
+    def largestOverlap(self, A, B):
+        self.init(A, B)
+        return max(
+            self.compare(x_trans, y_trans)
+            for x_trans in range(-(self.row_length-1), self.row_length)
+            for y_trans in range(-(self.column_count-1), self.column_count)
+        )
+
+    def init(self, A, B):
+        self.A = A
+        self.B = B
+        self.row_length = len(A[0])
+        self.column_count = len(A)
+
+    def compare(self, x_trans, y_trans):
+        overlap_count = 0
+        for row_selection in range(
+                max(y_trans, 0),
+                min(self.column_count, self.column_count + y_trans)
+        ):
+            for column_selection in range(
+                    max(x_trans, 0),
+                    min(self.row_length, self.row_length + x_trans)
+            ):
+                if (
+                        self.A[row_selection][column_selection] ==
+                        self.B[row_selection - y_trans][column_selection - x_trans] == 1
+                ):
+                    overlap_count += 1
+        return overlap_count
+
+if __name__ == '__main__':
+    sol = Solution()
+    sol.init([[1,1,0],[0,1,0],[0,1,0]],
+             [[1,0,0],[0,1,1],[0,0,1]])
+    print(sol.compare(-1, -1))