Code to grab the red lined polygon from Google Maps

modules/ximgproc/samples/findredlinedpolygonfromgooglemaps.py

+# USAGE - How to run this code ?
+# python find_shapes.py --image shapes.png
+#python findredlinedpolygonfromgooglemaps.py --image stanford.png 
+
+import numpy as np
+import argparse
+import cv2
+
+# construct the argument parse and parse the arguments
+ap = argparse.ArgumentParser()
+ap.add_argument("-i", "--image", help = "path to the image file")
+args = vars(ap.parse_args())
+
+# load the image
+image = cv2.imread(args["image"])
+lower = np.array([20,0,155])
+upper = np.array([255,120,250])
+shapeMask = cv2.inRange(image, lower, upper)
+
+# find the contours in the mask
+(cnts, _) = cv2.findContours(shapeMask.copy(), cv2.RETR_EXTERNAL,
+    cv2.CHAIN_APPROX_SIMPLE)
+cv2.imshow("Mask", shapeMask)
+
+# loop over the contours
+for c in cnts:
+    cv2.drawContours(image, [c], -1, (0, 255, 0), 2)
+    cv2.imshow("Image", image)
+    cv2.waitKey(0)
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