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/gapi/test/gapi_fluid_test_kernels.hpp

@@ -0,0 +1,138 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2018 Intel Corporation
+
+
+#ifndef GAPI_FLUID_TEST_KERNELS_HPP
+#define GAPI_FLUID_TEST_KERNELS_HPP
+
+#include <opencv2/gapi/fluid/gfluidkernel.hpp>
+
+namespace cv
+{
+namespace gapi_test_kernels
+{
+using cv::gapi::core::GMat3;
+using GMat2 = std::tuple<GMat, GMat>;
+
+G_TYPED_KERNEL(TAddSimple, <GMat(GMat, GMat)>, "test.fluid.add_simple") {
+    static cv::GMatDesc outMeta(cv::GMatDesc a, cv::GMatDesc) {
+        return a;
+    }
+};
+
+G_TYPED_KERNEL(TAddCSimple, <GMat(GMat,int)>, "test.fluid.addc_simple")
+{
+    static GMatDesc outMeta(const cv::GMatDesc &in, int) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TAddScalar, <GMat(GMat,GScalar)>, "test.fluid.addc_scalar")
+{
+    static GMatDesc outMeta(const cv::GMatDesc &in, const cv::GScalarDesc&) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TAddScalarToMat, <GMat(GScalar,GMat)>, "test.fluid.add_scalar_to_mat")
+{
+    static GMatDesc outMeta(const cv::GScalarDesc&, const cv::GMatDesc &in) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TBlur1x1, <GMat(GMat,int,Scalar)>, "org.opencv.imgproc.filters.blur1x1"){
+    static GMatDesc outMeta(GMatDesc in, int, Scalar) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TBlur3x3, <GMat(GMat,int,Scalar)>, "org.opencv.imgproc.filters.blur3x3"){
+    static GMatDesc outMeta(GMatDesc in, int, Scalar) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TBlur5x5, <GMat(GMat,int,Scalar)>, "org.opencv.imgproc.filters.blur5x5"){
+    static GMatDesc outMeta(GMatDesc in, int, Scalar) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TBlur3x3_2lpi, <GMat(GMat,int,Scalar)>, "org.opencv.imgproc.filters.blur3x3_2lpi"){
+    static GMatDesc outMeta(GMatDesc in, int, Scalar) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TBlur5x5_2lpi, <GMat(GMat,int,Scalar)>, "org.opencv.imgproc.filters.blur5x5_2lpi"){
+    static GMatDesc outMeta(GMatDesc in, int, Scalar) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TId, <GMat(GMat)>, "test.fluid.identity") {
+    static cv::GMatDesc outMeta(cv::GMatDesc a) {
+        return a;
+    }
+};
+
+G_TYPED_KERNEL(TId7x7, <GMat(GMat)>, "test.fluid.identity7x7") {
+    static cv::GMatDesc outMeta(cv::GMatDesc a) {
+        return a;
+    }
+};
+
+G_TYPED_KERNEL(TMerge3_4lpi, <GMat(GMat,GMat,GMat)>, "test.fluid.merge3_4lpi") {
+    static GMatDesc outMeta(GMatDesc in, GMatDesc, GMatDesc) {
+        return in.withType(in.depth, 3);
+    }
+};
+
+G_TYPED_KERNEL(TPlusRow0, <GMat(GMat)>, "test.fluid.plus_row0") {
+    static cv::GMatDesc outMeta(cv::GMatDesc a) {
+        return a;
+    }
+};
+
+G_TYPED_KERNEL(TSum2MatsAndScalar, <GMat(GMat,GScalar,GMat)>, "test.fluid.sum_2_mats_and_scalar")
+{
+    static GMatDesc outMeta(const cv::GMatDesc &in, const cv::GScalarDesc&, const cv::GMatDesc&) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL_M(TSplit3_4lpi, <GMat3(GMat)>, "test.fluid.split3_4lpi") {
+    static std::tuple<GMatDesc, GMatDesc, GMatDesc> outMeta(GMatDesc in) {
+        const auto out_depth = in.depth;
+        const auto out_desc  = in.withType(out_depth, 1);
+        return std::make_tuple(out_desc, out_desc, out_desc);
+    }
+};
+
+G_TYPED_KERNEL(TEqualizeHist, <GMat(GMat, GArray<int>)>, "test.fluid.equalize_hist")
+{
+    static GMatDesc outMeta(GMatDesc in, const cv::GArrayDesc&) {
+        return in;
+    }
+};
+
+G_TYPED_KERNEL(TCalcHist, <GArray<int>(GMat)>, "test.ocv.calc_hist")
+{
+    static GArrayDesc outMeta(GMatDesc) {
+        return {};
+    }
+};
+
+GMat merge3_4lpi(const GMat& src1, const GMat& src2, const GMat& src3);
+std::tuple<GMat, GMat, GMat> split3_4lpi(const GMat& src);
+
+extern cv::gapi::GKernelPackage fluidTestPackage;
+
+} // namespace gapi_test_kernels
+} // namespace cv
+
+#endif // GAPI_FLUID_TEST_KERNELS_HPP