feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/modules/calib3d/test/opencl/test_stereobm.cpp

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+///////////////////////////////////////////////////////////////////////////////////////
+//
+//  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.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
+// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., 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 the copyright holders 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 "cvconfig.h"
+#include "opencv2/ts/ocl_test.hpp"
+
+#ifdef HAVE_OPENCL
+
+namespace opencv_test {
+namespace ocl {
+
+PARAM_TEST_CASE(StereoBMFixture, int, int)
+{
+    int n_disp;
+    int winSize;
+    Mat left, right, disp;
+    UMat uleft, uright, udisp;
+
+    virtual void SetUp()
+    {
+        n_disp  = GET_PARAM(0);
+        winSize = GET_PARAM(1);
+
+        left  = readImage("gpu/stereobm/aloe-L.png", IMREAD_GRAYSCALE);
+        right = readImage("gpu/stereobm/aloe-R.png", IMREAD_GRAYSCALE);
+
+        ASSERT_FALSE(left.empty());
+        ASSERT_FALSE(right.empty());
+
+        left.copyTo(uleft);
+        right.copyTo(uright);
+    }
+
+    void Near(double eps = 0.0)
+    {
+        EXPECT_MAT_NEAR_RELATIVE(disp, udisp, eps);
+    }
+};
+
+OCL_TEST_P(StereoBMFixture, StereoBM)
+{
+    Ptr<StereoBM> bm = StereoBM::create( n_disp, winSize);
+    bm->setPreFilterType(bm->PREFILTER_XSOBEL);
+    bm->setTextureThreshold(0);
+
+    OCL_OFF(bm->compute(left, right, disp));
+    OCL_ON(bm->compute(uleft, uright, udisp));
+
+    Near(1e-3);
+}
+
+OCL_INSTANTIATE_TEST_CASE_P(StereoMatcher, StereoBMFixture, testing::Combine(testing::Values(32, 64, 128),
+                                       testing::Values(11, 21)));
+}//ocl
+}//cvtest
+
+#endif //HAVE_OPENCL