java实现黑图、透明图检测

配合对屏幕的截图操作，即可实现黑屏检测。稍微修改可以实现对任意指定颜色的图片进行判断，也可以实现纯色检测。

黑图检测代码如下。

public class SimpleColor {
    
    
    public static boolean isSimpleColorImg(String imgPath, float percent) throws IOException {
    
    
        BufferedImage src = ImageIO.read(new File(imgPath));
        int height = src.getHeight();
        int width = src.getWidth();
        int count = 0, pixel = 0;
        for (int i = 0; i < width; i++) {
    
    
            for (int j = 0; j < height; j++) {
    
    
                pixel = src.getRGB(i, j);
                Color color = new Color(pixel);
                int R = color.getRed();
                int G = color.getGreen();
                int B = color.getBlue();
                if(R < 30 && G < 30 && B < 30) {
    
    
                    count++;
                }
                if(count / (height * width) > percent) {
    
    
                    return true;
                }
            }
        }
        return false;
    }

    public static void main(String args[]) throws IOException {
    
    
        System.out.println(isSimpleColorImg("/home/wangzhou/Downloads/black.jpeg", 0.99f));
    }
}

看看透明图。

 public static boolean isTransparentScreen(String imgPath, float percent) throws IOException {
    
    
        BufferedImage src = ImageIO.read(new File(imgPath));
        int height = src.getHeight();
        int width = src.getWidth();
        int count = 0;
        for (int i = 0; i < width; i++) {
    
    
            for (int j = 0; j < height; j++) {
    
    
                if((src.getRGB(i,j)>>24)==0){
    
    
                    count++;
                }
                if (count / (height * width) > percent) {
    
    
                    return true;
                }
            }
        }
        return false;
    }