（超简单）将图片转换为ASCII字符图像

将一张图片转换为ASCII字符图像
原图：

效果图：

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;public class ImageToASCII {/*** 将图片转换为ASCII艺术字符图像** @param imgPath 图片路径（包括图片名）* @param outPath 生成的文本路径（包括文件名）*/public static void imageToASCII(String imgPath, String outPath) {// 表示不同灰度级别的ASCII字符final String base = "MNHQ&OC?7>!;:-.";StringBuffer result = new StringBuffer("");try {long start = System.currentTimeMillis();System.out.println("开始执行：");BufferedImage bufferedImage = ImageIO.read(new File(imgPath));// 使用嵌套的循环遍历图像的像素，每次处理一个区块（36 x 9像素）当前为 i=3 x j=2。for (int i = 0; i < bufferedImage.getHeight(); i += 3) {for (int j = 0; j < bufferedImage.getWidth(); j += 2) {int pixel = bufferedImage.getRGB(j, i); // 下面三行代码将一个数字转换为RGB数字int red = (pixel & 0xff0000) >> 16;int green = (pixel & 0xff00) >> 8;int blue = (pixel & 0xff);float gray = 0.299f * red + 0.578f * green + 0.114f * blue;int index = Math.round(gray * (base.length() + 1) / 255);result.append(index >= base.length() ? " " : String.valueOf(base.charAt(index)));}result.append("\r\n");}FileWriter fileWriter = new FileWriter(outPath);fileWriter.write(result.toString());fileWriter.flush();fileWriter.close();long end = System.currentTimeMillis();System.out.println("执行结束：共执行 " + (end - start) + "毫秒");} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {imageToASCII("E:\\images\\水娃.jpg", "E:\\images\\222.txt");}
}