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/ImgProc/Smoothing/Smoothing.java

@@ -0,0 +1,101 @@
+import org.opencv.core.*;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
+
+class SmoothingRun {
+
+    ///  Global Variables
+    int DELAY_CAPTION = 1500;
+    int DELAY_BLUR = 100;
+    int MAX_KERNEL_LENGTH = 31;
+
+    Mat src = new Mat(), dst = new Mat();
+    String windowName = "Filter Demo 1";
+
+    public void run(String[] args) {
+
+        String filename = ((args.length > 0) ? args[0] : "../data/lena.jpg");
+
+        src = Imgcodecs.imread(filename, Imgcodecs.IMREAD_COLOR);
+        if( src.empty() ) {
+            System.out.println("Error opening image");
+            System.out.println("Usage: ./Smoothing [image_name -- default ../data/lena.jpg] \n");
+            System.exit(-1);
+        }
+
+        if( displayCaption( "Original Image" ) != 0 ) { System.exit(0); }
+
+        dst = src.clone();
+        if( displayDst( DELAY_CAPTION ) != 0 ) { System.exit(0); }
+
+        /// Applying Homogeneous blur
+        if( displayCaption( "Homogeneous Blur" ) != 0 ) { System.exit(0); }
+
+        //! [blur]
+        for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
+            Imgproc.blur(src, dst, new Size(i, i), new Point(-1, -1));
+            displayDst(DELAY_BLUR);
+        }
+        //! [blur]
+
+        /// Applying Gaussian blur
+        if( displayCaption( "Gaussian Blur" ) != 0 ) { System.exit(0); }
+
+        //! [gaussianblur]
+        for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
+            Imgproc.GaussianBlur(src, dst, new Size(i, i), 0, 0);
+            displayDst(DELAY_BLUR);
+        }
+        //! [gaussianblur]
+
+        /// Applying Median blur
+        if( displayCaption( "Median Blur" ) != 0 ) { System.exit(0); }
+
+        //! [medianblur]
+        for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
+            Imgproc.medianBlur(src, dst, i);
+            displayDst(DELAY_BLUR);
+        }
+        //! [medianblur]
+
+        /// Applying Bilateral Filter
+        if( displayCaption( "Bilateral Blur" ) != 0 ) { System.exit(0); }
+
+        //![bilateralfilter]
+        for (int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2) {
+            Imgproc.bilateralFilter(src, dst, i, i * 2, i / 2);
+            displayDst(DELAY_BLUR);
+        }
+        //![bilateralfilter]
+
+        /// Done
+        displayCaption( "Done!" );
+
+        System.exit(0);
+    }
+
+    int displayCaption(String caption) {
+        dst = Mat.zeros(src.size(), src.type());
+        Imgproc.putText(dst, caption,
+                new Point(src.cols() / 4, src.rows() / 2),
+                Imgproc.FONT_HERSHEY_COMPLEX, 1, new Scalar(255, 255, 255));
+
+        return displayDst(DELAY_CAPTION);
+    }
+
+    int displayDst(int delay) {
+        HighGui.imshow( windowName, dst );
+        int c = HighGui.waitKey( delay );
+        if (c >= 0) { return -1; }
+        return 0;
+    }
+}
+
+public class Smoothing {
+    public static void main(String[] args) {
+        // Load the native library.
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+        new SmoothingRun().run(args);
+    }
+}