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/highgui/trackbar/AddingImagesTrackbar.java

@@ -0,0 +1,119 @@
+import java.awt.BorderLayout;
+import java.awt.Container;
+import java.awt.Image;
+
+import javax.swing.BoxLayout;
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSlider;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
+
+import org.opencv.core.Core;
+import org.opencv.core.Mat;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+
+public class AddingImagesTrackbar {
+    private static final int ALPHA_SLIDER_MAX = 100;
+    private int alphaVal = 0;
+    private Mat matImgSrc1;
+    private Mat matImgSrc2;
+    private Mat matImgDst = new Mat();
+    private JFrame frame;
+    private JLabel imgLabel;
+
+    public AddingImagesTrackbar(String[] args) {
+        //! [load]
+        String imagePath1 = "../data/LinuxLogo.jpg";
+        String imagePath2 = "../data/WindowsLogo.jpg";
+        if (args.length > 1) {
+            imagePath1 = args[0];
+            imagePath2 = args[1];
+        }
+        matImgSrc1 = Imgcodecs.imread(imagePath1);
+        matImgSrc2 = Imgcodecs.imread(imagePath2);
+        //! [load]
+        if (matImgSrc1.empty()) {
+            System.out.println("Empty image: " + imagePath1);
+            System.exit(0);
+        }
+        if (matImgSrc2.empty()) {
+            System.out.println("Empty image: " + imagePath2);
+            System.exit(0);
+        }
+
+        //! [window]
+        // Create and set up the window.
+        frame = new JFrame("Linear Blend");
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        // Set up the content pane.
+        Image img = HighGui.toBufferedImage(matImgSrc2);
+        addComponentsToPane(frame.getContentPane(), img);
+        // Use the content pane's default BorderLayout. No need for
+        // setLayout(new BorderLayout());
+        // Display the window.
+        frame.pack();
+        frame.setVisible(true);
+        //! [window]
+    }
+
+    private void addComponentsToPane(Container pane, Image img) {
+        if (!(pane.getLayout() instanceof BorderLayout)) {
+            pane.add(new JLabel("Container doesn't use BorderLayout!"));
+            return;
+        }
+
+        JPanel sliderPanel = new JPanel();
+        sliderPanel.setLayout(new BoxLayout(sliderPanel, BoxLayout.PAGE_AXIS));
+
+        //! [create_trackbar]
+        sliderPanel.add(new JLabel(String.format("Alpha x %d", ALPHA_SLIDER_MAX)));
+        JSlider slider = new JSlider(0, ALPHA_SLIDER_MAX, 0);
+        slider.setMajorTickSpacing(20);
+        slider.setMinorTickSpacing(5);
+        slider.setPaintTicks(true);
+        slider.setPaintLabels(true);
+        //! [create_trackbar]
+        //! [on_trackbar]
+        slider.addChangeListener(new ChangeListener() {
+            @Override
+            public void stateChanged(ChangeEvent e) {
+                JSlider source = (JSlider) e.getSource();
+                alphaVal = source.getValue();
+                update();
+            }
+        });
+        //! [on_trackbar]
+        sliderPanel.add(slider);
+
+        pane.add(sliderPanel, BorderLayout.PAGE_START);
+        imgLabel = new JLabel(new ImageIcon(img));
+        pane.add(imgLabel, BorderLayout.CENTER);
+    }
+
+    private void update() {
+        double alpha = alphaVal / (double) ALPHA_SLIDER_MAX;
+        double beta = 1.0 - alpha;
+        Core.addWeighted(matImgSrc1, alpha, matImgSrc2, beta, 0, matImgDst);
+        Image img = HighGui.toBufferedImage(matImgDst);
+        imgLabel.setIcon(new ImageIcon(img));
+        frame.repaint();
+    }
+
+    public static void main(String[] args) {
+        // Load the native OpenCV library
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+
+        // Schedule a job for the event dispatch thread:
+        // creating and showing this application's GUI.
+        javax.swing.SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                new AddingImagesTrackbar(args);
+            }
+        });
+    }
+}