如何根据文本所在的背景更改文本的前景色？

Question

I have a JCheckbox ,this is in a JPanel , that is supposed to show an image in the JPanel , when you select it. The problem is this: as you can see in the screenshot, the text of the JCheckbox is difficult to read because of the image.

I was thinking if there was some way to contrast the text to the image, so that the color of the text is the opposite of the image.

I know that there're other ways to fix it, like setting the JCheckbox outside the image, but I'd have to change design of my program and structure code.

For example, here's how I want it to look:

.

This is all the code that the JCheckBox currently has, it is something simple:

        final JCheckBox INFO_IMG = new JCheckBox("Ver img");

        INFO_IMG.setFont(new Font("Dialog", 0, 12));
        INFO_IMG.setBounds(-2, 2, 78, 13);
        INFO_IMG.setOpaque(false);
        INFO_IMG.setFocusable(false);
        INFO_IMG.addItemListener(new ItemListener() {

            @Override
            public void itemStateChanged(final ItemEvent ie) {
                if (1 == ie.getStateChange()) {
                    INFO_IMG.setText("Ver info");
                    IMG.setVisible(true);
/*                  INFO_IMG.setForegound(ROBOT.getPixelColor(
                    (int)INFO_IMG.getLocationOnScreen.getX() + 12 
                    ,(int) INFO_IMG.getLocationOnScreen().getY() + 10)); 

                   This is another way that I had thought of,
                   although it does not work well,would also have to get 
                   the opposite color from the one return.
*/
              } else { 
                    INFO_IMG.setText("Ver img");
                    IMG.setVisible(false);
                }
            }
        });
        add(INFO_IMG);

Answer 1

Well, I have found this way to do it, but unfortunately it only works for black and white, can you think of other ways?

Public Color contrast(Image image) {
    BufferedImage buffered = toBufferedImage(image);
        
    int black = 0, white = 0;
        
    for (int x = 0; x < buffered.getWidth(); x++) {
        for (int y = 0; y < buffered.getHeight(); y++) {
            if(buffered.getRGB(x, y) == Color.BLACK.getRGB()) {
                black++;
            }else {
                white++;
            }
        }
    }
        
    System.out.println("Blanco: " + white + ", Negro: " + black);
    
    return (white > black) ? Color.BLACK : Color.WHITE;
}

private BufferedImage toBufferedImage(Image image) {
    int width = image.getWidth(null);
    int height = image.getHeight(null);
    int argb = BufferedImage.TYPE_BYTE_BINARY;
        
    BufferedImage buffered = new BufferedImage(width, height, argb);
        
    Graphics2D g2 = buffered.createGraphics();
    g2.drawImage(image, 0, 0, null);
    g2.dispose(); 
        
    // JOptionPane.showMessageDialog(null, new ImageIcon(buffered));

    return buffered;
}