did it

template_matching.py

@@ -0,0 +1,32 @@
+import numpy as np
+import matplotlib.pyplot as plt
+from scipy.ndimage.filters import gaussian_filter
+import cv2
+import scipy
+
+I_1 = plt.imread('waldo_1.jpg')
+
+waldo = plt.imread('waldo_template.jpg')
+
+error = float('inf')
+min_u = 0
+min_v = 0
+min_size = ((0,0))
+while (waldo.shape[0] > 15):
+  waldo_width = waldo.shape[0]
+  waldo_height = waldo.shape[1]
+  for u in range(0, I_1.shape[0] - waldo_width):
+    for v in range(0, I_1.shape[1] - waldo_height):
+      patch = I_1[u:u + waldo_width, v: v + waldo_height]
+      test_error = np.sum((patch-waldo)**2)
+      if test_error < error:
+        min_u = u
+        min_v = v
+        min_size = ((waldo_width, waldo_height))
+        error = test_error      
+  print(waldo.shape)
+  waldo = gaussian_filter(waldo, sigma=1)
+  waldo = scipy.misc.imresize(waldo, 0.5)
+print(min_u, min_v, min_size)
+plt.imshow(I_1)
+plt.show()