java读取图片转化为字符画

public static String _BitmapConvert(String imgpath) {

    StringBuffer _sb = new StringBuffer();

    File imgfile = new File(imgpath);

    char[] charset = { 'M', '8', '0', 'V', '1', 'i', ':', '*', '|', '.', ' ' };

    try {

        BufferedImage buff = ImageIO.read(imgfile);

 

        int bitmapH = buff.getHeight();

        int bitmapW = buff.getWidth();

 

        for (int y = 0; y < bitmapH; y++) {

            for (int x = 0; x < bitmapW; x++) {

                int rgb = buff.getRGB(x, y);

                Color c = new Color(rgb);

                int cc = (c.getRed() + c.getGreen() + c.getBlue()) / 3;

                _sb.append(charset[(int) ((cc * 10 - 1) / 255)]);

            }

            _sb.append("\r\n");

        }

    } catch (Exception e) {

    }

    return _sb.toString();

}