Update test_thinning.cpp

Author: sturkmen72

modules/ximgproc/test/test_thinning.cpp

@@ -10,22 +10,34 @@ TEST(ximgproc_Thinning, simple_ZHANGSUEN)
 {
     string dir = cvtest::TS::ptr()->get_data_path();
     Mat src = imread(dir + "cv/ximgproc/sources/08.png", IMREAD_GRAYSCALE);
-    Mat dst;
+    Mat dst,check_img;
+
+    thinning(src, dst, THINNING_ZHANGSUEN);
+
+    check_img = imread(dir + "cv/ximgproc/results/Thinning_ZHANGSUEN.png", IMREAD_GRAYSCALE);
+    EXPECT_EQ(0, cvtest::norm(check_img, dst, NORM_INF));
+
     thinning(~src, dst, THINNING_ZHANGSUEN);
 
-    src = imread(dir + "cv/ximgproc/results/Thinning_ZHANGSUEN.png", IMREAD_GRAYSCALE);
-    EXPECT_EQ(0, cvtest::norm(src, dst, NORM_INF));
+    check_img = imread(dir + "cv/ximgproc/results/Thinning_inv_ZHANGSUEN.png", IMREAD_GRAYSCALE);
+    EXPECT_EQ(0, cvtest::norm(check_img, dst, NORM_INF));
 }
 
 TEST(ximgproc_Thinning, simple_GUOHALL)
 {
     string dir = cvtest::TS::ptr()->get_data_path();
     Mat src = imread(dir + "cv/ximgproc/sources/08.png", IMREAD_GRAYSCALE);
-    Mat dst;
+    Mat dst,check_img;
+
+    thinning(src, dst, THINNING_GUOHALL);
+
+    check_img = imread(dir + "cv/ximgproc/results/Thinning_GUOHALL.png", IMREAD_GRAYSCALE);
+    EXPECT_EQ(0, cvtest::norm(check_img, dst, NORM_INF));
+
     thinning(~src, dst, THINNING_GUOHALL);
 
-    src = imread(dir + "cv/ximgproc/results/Thinning_GUOHALL.png", IMREAD_GRAYSCALE);
-    EXPECT_EQ(0, cvtest::norm(src, dst, NORM_INF));
+    check_img = imread(dir + "cv/ximgproc/results/Thinning_inv_GUOHALL.png", IMREAD_GRAYSCALE);
+    EXPECT_EQ(0, cvtest::norm(check_img, dst, NORM_INF));
 }
 
 }} // namespace