From 272213320603052ba756e14bfe95e037df699de0 Mon Sep 17 00:00:00 2001
From: Wenju He <hewj03@gmail.com>
Date: Sun, 12 Feb 2017 17:16:49 +0800
Subject: [PATCH] add accuracy test CUDA_MultiBandBlender

---
 modules/stitching/test/test_blenders.cuda.cpp | 93 +++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 modules/stitching/test/test_blenders.cuda.cpp

diff --git a/modules/stitching/test/test_blenders.cuda.cpp b/modules/stitching/test/test_blenders.cuda.cpp
new file mode 100644
index 0000000000..1b60838b91
--- /dev/null
+++ b/modules/stitching/test/test_blenders.cuda.cpp
@@ -0,0 +1,93 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                        Intel License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of Intel Corporation may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "test_precomp.hpp"
+#include "opencv2/ts/cuda_test.hpp"
+
+#if defined(HAVE_OPENCV_CUDAARITHM) && defined(HAVE_OPENCV_CUDAWARPING)
+
+using namespace cv;
+using namespace std;
+
+namespace
+{
+    void multiBandBlend(const cv::Mat& im1, const cv::Mat& im2, const cv::Mat& mask1, const cv::Mat& mask2, cv::Mat& result, bool try_cuda)
+    {
+        detail::MultiBandBlender blender(try_cuda, 5);
+
+        blender.prepare(Rect(0, 0, max(im1.cols, im2.cols), max(im1.rows, im2.rows)));
+        blender.feed(im1, mask1, Point(0,0));
+        blender.feed(im2, mask2, Point(0,0));
+
+        Mat result_s, result_mask;
+        blender.blend(result_s, result_mask);
+        result_s.convertTo(result, CV_8U);
+    }
+}
+
+TEST(CUDA_MultiBandBlender, Accuracy)
+{
+    Mat image1 = imread(string(cvtest::TS::ptr()->get_data_path()) + "cv/shared/baboon.png");
+    Mat image2 = imread(string(cvtest::TS::ptr()->get_data_path()) + "cv/shared/lena.png");
+    ASSERT_EQ(image1.rows, image2.rows); ASSERT_EQ(image1.cols, image2.cols);
+
+    Mat image1s, image2s;
+    image1.convertTo(image1s, CV_16S);
+    image2.convertTo(image2s, CV_16S);
+
+    Mat mask1(image1s.size(), CV_8U);
+    mask1(Rect(0, 0, mask1.cols/2, mask1.rows)).setTo(255);
+    mask1(Rect(mask1.cols/2, 0, mask1.cols - mask1.cols/2, mask1.rows)).setTo(0);
+
+    Mat mask2(image2s.size(), CV_8U);
+    mask2(Rect(0, 0, mask2.cols/2, mask2.rows)).setTo(0);
+    mask2(Rect(mask2.cols/2, 0, mask2.cols - mask2.cols/2, mask2.rows)).setTo(255);
+
+    cv::Mat result;
+    multiBandBlend(image1s, image2s, mask1, mask2, result, false);
+
+    cv::Mat result_cuda;
+    multiBandBlend(image1s, image2s, mask1, mask2, result_cuda, true);
+
+    EXPECT_MAT_NEAR(result, result_cuda, 3);
+}
+
+#endif