ImageIO

 

 

public class Main {
   
    private static final String OUTPUT_FORMAT = "%3d:(%3d,%3d,%3d)\t";

    public static void main(String[] args) {
        getImagePixel("D:\\log\\pic\\11111.jpg");
    }

    public static void getImagePixel(String image) {
        int[] rgb = new int[3];
        File file = new File(image);
        BufferedImage bi = null;
        try {
            bi = ImageIO.read(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        int width = bi.getWidth();
        int height = bi.getHeight();

        int minx = bi.getMinX();
        int miny = bi.getMinY();
        System.out.println("width=" + width + ",height=" + height + ".");
        System.out.println("minx=" + minx + ",miniy=" + miny + ".");

        FileOutputStream out = null;

        try {
            out = new FileOutputStream(new File(".\\test.txt"));
            for (int i = minx; i < height; i++) {
                for (int j = miny; j < width; j++) {
                    int pixel = bi.getRGB(j, i);
                    rgb[0] = (pixel & 0xff0000) >> 16;
                    rgb[1] = (pixel & 0xff00) >> 8;
                    rgb[2] = (pixel & 0xff);                    
                    String unit = String.format(OUTPUT_FORMAT, j, rgb[0], rgb[1], rgb[2]);
                    out.write(unit.getBytes());
                }

                out.write("\r\n".getBytes());
            }
        } catch (Exception e) {
            Log.e(TAG, "Fail to write file.");
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (Exception e) {
                Log.e(TAG, e.getMessage());
            }
        }
    }
}