opencv java swing grayscale image binarized

 Based maven

First, the introduction of opencv 

        <!-- https://mvnrepository.com/artifact/org.bytedeco.javacpp-presets/opencv -->
<dependency>
    <groupId>org.bytedeco.javacpp-presets</groupId>
    <artifactId>opencv</artifactId>
    <version>4.0.1-1.4.4</version>
</dependency>

 Create a form and a number of buttons used to operate

Create several panel to display and label the picture

First read as grayscale images

The System.loadLibrary (Core.NATIVE_LIBRARY_NAME); 
        org.opencv.core.Mat grayImgMat = imread ( " the src \\ \\ Resource " + jTFimgName.getText (), IMREAD_GRAYSCALE); // read as grayscale 
        Imgcodecs.imwrite ( " src \\ \\ gray.png Resource " , grayImgMat); // save mat object file

 

And then displayed on the label inside

ImageIcon grayIcon = new ImageIcon("src\\resource\\gray.png");
        grayIcon.setImage(grayIcon.getImage().getScaledInstance(320, 240, Image.SCALE_DEFAULT));//大小 可以自由设置        
        jLabGray.setIcon(grayIcon);