add python binding and tests for composePanorama

fix tests

    pick 54039c2afd add python binding and tests for composePanorama

modules/stitching/include/opencv2/stitching.hpp

@@ -264,7 +264,7 @@ public:
     @param pano Final pano.
     @return Status code.
      */
-    Status composePanorama(InputArrayOfArrays images, OutputArray pano);
+    CV_WRAP Status composePanorama(InputArrayOfArrays images, OutputArray pano);
 
     /** @overload */
     CV_WRAP Status stitch(InputArrayOfArrays images, OutputArray pano);

modules/stitching/misc/python/test/test_stitching.py

@@ -19,5 +19,36 @@ class stitching_test(NewOpenCVTests):
         self.assertAlmostEqual(pano.shape[0], 685, delta=100, msg="rows: %r" % list(pano.shape))
         self.assertAlmostEqual(pano.shape[1], 1025, delta=100, msg="cols: %r" % list(pano.shape))
 
+
+class stitching_compose_panorama_test_no_args(NewOpenCVTests):
+
+    def test_simple(self):
+
+        img1 = self.get_sample('stitching/a1.png')
+        img2 = self.get_sample('stitching/a2.png')
+
+        stitcher = cv.createStitcher(False)
+
+        stitcher.estimateTransform((img1, img2))
+
+        result, _ = stitcher.composePanorama()
+
+        assert result == 0
+
+
+class stitching_compose_panorama_args(NewOpenCVTests):
+
+    def test_simple(self):
+
+        img1 = self.get_sample('stitching/a1.png')
+        img2 = self.get_sample('stitching/a2.png')
+
+        stitcher = cv.createStitcher(False)
+
+        stitcher.estimateTransform((img1, img2))
+        result, _ = stitcher.composePanorama((img1, img2))
+
+        assert result == 0
+
 if __name__ == '__main__':
     NewOpenCVTests.bootstrap()