Merge branch 4.x

modules/imgproc/misc/python/test/test_imgproc.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+
+import numpy as np
+import cv2 as cv
+
+from tests_common import NewOpenCVTests
+
+class Imgproc_Tests(NewOpenCVTests):
+
+    def test_python_986(self):
+        cntls = []
+        img = np.zeros((100,100,3), dtype=np.uint8)
+        color = (0,0,0)
+        cnts = np.array(cntls, dtype=np.int32).reshape((1, -1, 2))
+        try:
+            cv.fillPoly(img, cnts, color)
+            assert False
+        except:
+            assert True
+
+    def test_filter2d(self):
+        img = self.get_sample('samples/data/lena.jpg', 1)
+        eps = 0.001
+        # compare 2 ways of computing 3x3 blur using the same function
+        kernel = np.array([[1, 1, 1], [1, 1, 1], [1, 1, 1]], dtype='float32')
+        img_blur0 = cv.filter2D(img, cv.CV_32F, kernel*(1./9))
+        img_blur1 = cv.filter2Dp(img, kernel, ddepth=cv.CV_32F, scale=1./9)
+        self.assertLess(cv.norm(img_blur0 - img_blur1, cv.NORM_INF), eps)