Java OpenCV图像处理之图形与文字绘制

package com.xu.opencv.canva;

import java.io.File;

import java.util.ArrayList;

import java.util.List;

import org.opencv.core.Mat;

import org.opencv.core.MatOfPoint;

import org.opencv.core.Point;

import org.opencv.core.Scalar;

import org.opencv.core.Size;

import org.opencv.highgui.HighGui;

import org.opencv.imgcodecs.Imgcodecs;

import org.opencv.imgproc.Imgproc;

/**

  * @version V-1.0

  * @Title: Canvas.java

  * @Package com.xu.opencv.canvas

  * @Description: TODO

  * @author: hyacinth

  * @date: 2019年1月26日 下午5:08:18

  * @Copyright: 2019 hyacinth

  */

public class Canvas {

     static {

         String os = System.getProperty( "os.name" );

         String type = System.getProperty( "sun.arch.data.model" );

         if (os.toUpperCase().contains( "WINDOWS" )) {

             File lib;

             if (type.endsWith( "64" )) {

                 lib = new File( "lib\\OpenCV-455\\x64\\" + System.mapLibraryName( "opencv_java455" ));

             } else {

                 lib = new File( "lib\\OpenCV-455\\x86\\" + System.mapLibraryName( "opencv_java455" ));

             }

             System.load(lib.getAbsolutePath());

         }

     }

     public static void main(String[] args) {

         fillPoly();

     }

     /**

      * OpenCV-4.0.0 图像文字

      *

      * @return: void

      * @date: 2019年1月26日 下午5:37:04

      */

     public static void putText() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         Imgproc.putText(src, "test text" , new Point( 60 , 60 ), Imgproc.FONT_HERSHEY_SIMPLEX, 1.0 , new Scalar( 0 , 255 , 0 ), 1 , Imgproc.LINE_AA, false );

         HighGui.imshow( "putText" , src);

         HighGui.waitKey( 1 );

     }

     /**

      * OpenCV-4.0.0 图像画线

      *

      * @return: void

      * @date: 2019年1月17日 下午8:32:41

      */

     public static void line() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         Imgproc.line(src, new Point( 10 , 50 ), new Point( 100 , 50 ), new Scalar( 0 , 0 , 255 ), 1 , Imgproc.LINE_AA);

         HighGui.imshow( "图像画线" , src);

         HighGui.waitKey( 1 );

     }

     /**

      * OpenCV-4.0.0 图像椭圆

      *

      * @return: void

      * @date: 2019年1月17日 下午8:32:56

      */

     public static void ellipse() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         Imgproc.ellipse(src, new Point( 200 , 200 ), new Size( 90 , 50 ), 0 , 0 , 360 , new Scalar( 0 , 0 , 255 ), 1 , Imgproc.LINE_AA);

         HighGui.imshow( "图像椭圆" , src);

         HighGui.waitKey( 1 );

     }

     /**

      * OpenCV-4.0.0 图像矩形

      *

      * @return: void

      * @date: 2019年1月17日 下午8:33:08

      */

     public static void rectangle() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         Imgproc.rectangle(src, new Point( 10 , 10 ), new Point( 200 , 200 ), new Scalar( 0 , 255 , 0 ));

         HighGui.imshow( "图像矩形" , src);

         HighGui.waitKey( 1 );

     }

     /**

      * OpenCV-4.0.0 图像画圆

      *

      * @return: void

      * @date: 2019年1月17日 下午8:33:27

      */

     public static void circle() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         Imgproc.circle(src, new Point( 50 , 50 ), 20 , new Scalar( 0 , 255 , 0 ), 2 , Imgproc.LINE_8);

         HighGui.imshow( "图像画圆" , src);

         HighGui.waitKey( 1 );

     }

     /**

      * OpenCV-4.0.0 图像填充

      *

      * @return: void

      * @date: 2019年1月26日 下午6:25:55

      */

     public static void fillPoly() {

         Mat src = Imgcodecs.imread( "D:\\OneDrive\\桌面\\5.jpeg" );

         // 1

         List<Point> points1 = new ArrayList<>();

         points1.add( new Point( 0 , 100 ));

         points1.add( new Point( 50 , 50 ));

         points1.add( new Point( 100 , 100 ));

         points1.add( new Point( 150 , 50 ));

         points1.add( new Point( 200 , 100 ));

         points1.add( new Point( 100 , 250 ));

         Point[] array = points1.stream().toArray(Point[]:: new );

         MatOfPoint point = new MatOfPoint(array);

         Imgproc.fillConvexPoly(src, point, new Scalar( 0 , 255 , 0 ), Imgproc.LINE_AA);

         // 2

         List<Point> points2 = new ArrayList<>();

         points2.add( new Point( 100 , 100 ));

         points2.add( new Point( 150 , 50 ));

         points2.add( new Point( 200 , 100 ));

         Imgproc.fillConvexPoly(src, new MatOfPoint(points2.stream().toArray(Point[]:: new )), new Scalar( 0 , 255 , 0 ), Imgproc.LINE_AA);

         HighGui.imshow( "图像填充" , src);

         HighGui.waitKey( 1 );

     }

}