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/HoughCircle/HoughCircles.java

@@ -0,0 +1,77 @@
+package sample;
+/**
+ * @file HoughCircles.java
+ * @brief This program demonstrates circle finding with the Hough transform
+ */
+
+import org.opencv.core.*;
+import org.opencv.core.Point;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
+
+class HoughCirclesRun {
+
+    public void run(String[] args) {
+
+        //! [load]
+        String default_file = "../../../../data/smarties.png";
+        String filename = ((args.length > 0) ? args[0] : default_file);
+
+        // Load an image
+        Mat src = Imgcodecs.imread(filename, Imgcodecs.IMREAD_COLOR);
+
+        // Check if image is loaded fine
+        if( src.empty() ) {
+            System.out.println("Error opening image!");
+            System.out.println("Program Arguments: [image_name -- default "
+                    + default_file +"] \n");
+            System.exit(-1);
+        }
+        //! [load]
+
+        //! [convert_to_gray]
+        Mat gray = new Mat();
+        Imgproc.cvtColor(src, gray, Imgproc.COLOR_BGR2GRAY);
+        //! [convert_to_gray]
+
+        //![reduce_noise]
+        Imgproc.medianBlur(gray, gray, 5);
+        //![reduce_noise]
+
+        //! [houghcircles]
+        Mat circles = new Mat();
+        Imgproc.HoughCircles(gray, circles, Imgproc.HOUGH_GRADIENT, 1.0,
+                (double)gray.rows()/16, // change this value to detect circles with different distances to each other
+                100.0, 30.0, 1, 30); // change the last two parameters
+                // (min_radius & max_radius) to detect larger circles
+        //! [houghcircles]
+
+        //! [draw]
+        for (int x = 0; x < circles.cols(); x++) {
+            double[] c = circles.get(0, x);
+            Point center = new Point(Math.round(c[0]), Math.round(c[1]));
+            // circle center
+            Imgproc.circle(src, center, 1, new Scalar(0,100,100), 3, 8, 0 );
+            // circle outline
+            int radius = (int) Math.round(c[2]);
+            Imgproc.circle(src, center, radius, new Scalar(255,0,255), 3, 8, 0 );
+        }
+        //! [draw]
+
+        //! [display]
+        HighGui.imshow("detected circles", src);
+        HighGui.waitKey();
+        //! [display]
+
+        System.exit(0);
+    }
+}
+
+public class HoughCircles {
+    public static void main(String[] args) {
+        // Load the native library.
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+        new HoughCirclesRun().run(args);
+    }
+}