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/java/tutorial_code/ImgTrans/LaPlace/LaplaceDemo.java

@@ -0,0 +1,73 @@
+/**
+ * @file LaplaceDemo.java
+ * @brief Sample code showing how to detect edges using the Laplace operator
+ */
+
+import org.opencv.core.*;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
+
+class LaplaceDemoRun {
+
+    public void run(String[] args) {
+        //! [variables]
+        // Declare the variables we are going to use
+        Mat src, src_gray = new Mat(), dst = new Mat();
+        int kernel_size = 3;
+        int scale = 1;
+        int delta = 0;
+        int ddepth = CvType.CV_16S;
+        String window_name = "Laplace Demo";
+        //! [variables]
+
+        //! [load]
+        String imageName = ((args.length > 0) ? args[0] : "../data/lena.jpg");
+
+        src = Imgcodecs.imread(imageName, Imgcodecs.IMREAD_COLOR); // Load an image
+
+        // Check if image is loaded fine
+        if( src.empty() ) {
+            System.out.println("Error opening image");
+            System.out.println("Program Arguments: [image_name -- default ../data/lena.jpg] \n");
+            System.exit(-1);
+        }
+        //! [load]
+
+        //! [reduce_noise]
+        // Reduce noise by blurring with a Gaussian filter ( kernel size = 3 )
+        Imgproc.GaussianBlur( src, src, new Size(3, 3), 0, 0, Core.BORDER_DEFAULT );
+        //! [reduce_noise]
+
+        //! [convert_to_gray]
+        // Convert the image to grayscale
+        Imgproc.cvtColor( src, src_gray, Imgproc.COLOR_RGB2GRAY );
+        //! [convert_to_gray]
+
+        /// Apply Laplace function
+        Mat abs_dst = new Mat();
+        //! [laplacian]
+        Imgproc.Laplacian( src_gray, dst, ddepth, kernel_size, scale, delta, Core.BORDER_DEFAULT );
+        //! [laplacian]
+
+        //! [convert]
+        // converting back to CV_8U
+        Core.convertScaleAbs( dst, abs_dst );
+        //! [convert]
+
+        //! [display]
+        HighGui.imshow( window_name, abs_dst );
+        HighGui.waitKey(0);
+        //! [display]
+
+        System.exit(0);
+    }
+}
+
+public class LaplaceDemo {
+    public static void main(String[] args) {
+        // Load the native library.
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+        new LaplaceDemoRun().run(args);
+    }
+}