如何使用 Swing 显示 OpenCV Mat 对象?
ImageIcon 类是 Icon 接口的一种实现,用于从图像绘制图标。你可以使用此类在 Swing 窗口中显示图像,该类的构造函数接受一个 BufferedImage 对象作为参数。
因此,若要使用 Swing 窗口显示存储在 Mat 对象中的 OpenCV 图像,你需要将其转换为 BufferedImage 对象,并将其作为参数传递给 ImageIcon 方法。
示例
import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.InputStream; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.core.MatOfByte; import org.opencv.imgcodecs.Imgcodecs; public class DisplayingImagesUsingSwings { public static void main(String args[]) throws Exception { //Loading the OpenCV core library System.loadLibrary( Core.NATIVE_LIBRARY_NAME ); //Reading the Image from the file String file = "D:\images\tree.jpg"; Mat image = Imgcodecs.imread(file); //Encoding the image MatOfByte matOfByte = new MatOfByte(); Imgcodecs.imencode(".jpg", image, matOfByte); //Storing the encoded Mat in a byte array byte[] byteArray = matOfByte.toArray(); //Preparing the Buffered Image InputStream in = new ByteArrayInputStream(byteArray); BufferedImage bufImage = ImageIO.read(in); //Instantiate JFrame JFrame frame = new JFrame(); //Set Content to the JFrame frame.getContentPane().add(new JLabel(new ImageIcon(bufImage))); frame.pack(); frame.setVisible(true); System.out.println("Image Loaded"); } }
输出
执行时,上述程序将生成以下输出 −
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