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/samples/hal/slow_hal/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 2.8.8 FATAL_ERROR)
+
+set(PROJECT_NAME "slow_hal")
+set(HAL_LIB_NAME "slow_hal")
+
+add_library(${HAL_LIB_NAME} impl.cpp)
+set_target_properties(${HAL_LIB_NAME} PROPERTIES POSITION_INDEPENDENT_CODE TRUE)
+set(OPENCV_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../..")
+target_include_directories(${HAL_LIB_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} ${OPENCV_SRC_DIR}/modules/core/include)
+
+set(OpenCV_HAL_FOUND TRUE)
+set(OpenCV_HAL_VERSION 0.0.1)
+set(OpenCV_HAL_LIBRARIES ${CMAKE_CURRENT_BINARY_DIR}/lib${HAL_LIB_NAME}.a)
+set(OpenCV_HAL_HEADERS "impl.hpp")
+set(OpenCV_HAL_INCLUDE_DIRS ${CMAKE_CURRENT_LIST_DIR})
+
+configure_file("impl.hpp" "${CMAKE_BINARY_DIR}/impl.hpp" COPYONLY)
+configure_file("config.cmake" "${CMAKE_BINARY_DIR}/OpenCV_HALConfig.cmake")

3rdparty/opencv-4.5.4/samples/hal/slow_hal/config.cmake

@@ -0,0 +1,5 @@
+set(OpenCV_HAL_FOUND @OpenCV_HAL_FOUND@)
+set(OpenCV_HAL_VERSION @OpenCV_HAL_VERSION@)
+set(OpenCV_HAL_LIBRARIES @OpenCV_HAL_LIBRARIES@)
+set(OpenCV_HAL_HEADERS @OpenCV_HAL_HEADERS@)
+set(OpenCV_HAL_INCLUDE_DIRS @OpenCV_HAL_INCLUDE_DIRS@)

3rdparty/opencv-4.5.4/samples/hal/slow_hal/impl.cpp

@@ -0,0 +1,33 @@
+#include "impl.hpp"
+
+int slow_and8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height)
+{
+    for(; height--; src1 = src1 + step1, src2 = src2 + step2, dst = dst + step)
+        for(int x = 0 ; x < width; x++ )
+            dst[x] = src1[x] & src2[x];
+    return CV_HAL_ERROR_OK;
+}
+
+int slow_or8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height)
+{
+    for(; height--; src1 = src1 + step1, src2 = src2 + step2, dst = dst + step)
+        for(int x = 0 ; x < width; x++ )
+            dst[x] = src1[x] | src2[x];
+    return CV_HAL_ERROR_OK;
+}
+
+int slow_xor8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height)
+{
+    for(; height--; src1 = src1 + step1, src2 = src2 + step2, dst = dst + step)
+        for(int x = 0 ; x < width; x++ )
+            dst[x] = src1[x] ^ src2[x];
+    return CV_HAL_ERROR_OK;
+}
+
+int slow_not8u(const uchar* src1, size_t step1, uchar* dst, size_t step, int width, int height)
+{
+    for(; height--; src1 = src1 + step1, dst = dst + step)
+        for(int x = 0 ; x < width; x++ )
+            dst[x] = ~src1[x];
+    return CV_HAL_ERROR_OK;
+}

3rdparty/opencv-4.5.4/samples/hal/slow_hal/impl.hpp

@@ -0,0 +1,20 @@
+#ifndef _SIMPLE_HPP_INCLUDED_
+#define _SIMPLE_HPP_INCLUDED_
+
+#include "opencv2/core/hal/interface.h"
+
+int slow_and8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height);
+int slow_or8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height);
+int slow_xor8u(const uchar* src1, size_t step1, const uchar* src2, size_t step2, uchar* dst, size_t step, int width, int height);
+int slow_not8u(const uchar* src1, size_t step1, uchar* dst, size_t step, int width, int height);
+
+#undef cv_hal_and8u
+#define cv_hal_and8u slow_and8u
+#undef cv_hal_or8u
+#define cv_hal_or8u slow_or8u
+#undef cv_hal_xor8u
+#define cv_hal_xor8u slow_xor8u
+#undef cv_hal_not8u
+#define cv_hal_not8u slow_not8u
+
+#endif