使用java将图片转化成字符图形

原理是对每个像素计算灰度，将灰度映射到字符数组上，很简单，只有几行代码，效果还是不错的

	private final static char[] asc = { ' ', '`', '.', '^', ',', ':', '~', '"', '<', '!', 'c', 't', '+', '{', 'i', '7',
			'?', 'u', '3', '0', 'p', 'w', '4', 'A', '8', 'D', 'X', '%', '#', 'H', 'W', 'M' };

	public static StringBuilder imageToAscii(BufferedImage image) throws IOException {
		StringBuilder sb = new StringBuilder();
		int width = image.getWidth();
		int height = image.getHeight();
		for (int i = 0; i < height; i++) {
			for (int j = 0; j < width; j++) {
				int rgb = image.getRGB(j, i);
				int R = (rgb & 0xff0000) >> 16;
				int G = (rgb & 0x00ff00) >> 8;
				int B = rgb & 0x0000ff;
				int gray = (R * 30 + G * 59 + B * 11 + 50) / 100;
				int index = 31 * gray / 255;
				sb.append(asc[index]);
			}
			sb.append("\n");
		}
		return sb;
	}

下面是原图和效果图