图片转ASCII图案

这个小项目，可以将图片转化为ASCII图案，并且将ASCII图案输出为照片。
修改部分注释，可以进行图片缩略。
注：本项目参照于spring boot的banner
可查阅源代码：org.springframework.boot.SpringApplicationBannerPrinter

public class Image {
    private static final String[] PIXEL = new String[]{" ", ".", "*", ":", "o", "&", "8", "#", "%",">"};
    public static void main(String[] args) throws IOException {
        BufferedImage bufferedImage = getImage("resources/love.jpg");
        printImage(bufferedImage);
    }

    private static void printImage(BufferedImage bufferedImage) throws IOException {
        File file = new File("resources/0915.jpg");
        int width = bufferedImage.getWidth();
        int height = bufferedImage.getHeight();
        Graphics graphics = bufferedImage.getGraphics();
        for (int y=0;y < height;y++){
            for (int x=0;x < width;x++){
                int rgb = bufferedImage.getRGB(x,y);
                Color color = new Color(rgb);
                int red = color.getRed();
                int green = color.getGreen();
                int blue = color.getBlue();
                //计算亮点 ImageBanner类中
                //double luminance = 0.2126D * red + 0.7152D * green + 0.0722D * blue;
                double luminance = (red+green+blue)/3;
                //double index = luminance / (Math.ceil(255 / PIXEL.length) + 0.5);
                double index = luminance/28;
                //String a = String.valueOf(PIXEL[(int)(Math.floor(index))]);
                //StringBuilder builder = new StringBuilder();

                System.out.print(PIXEL[(int)(Math.floor(index))]);
                graphics.setColor(color);
                graphics.drawString(PIXEL[(int)(Math.floor(index))],x,y);
            }
            System.out.println(" ");
        }
        ImageIO.write(bufferedImage,"jpg",file);
    }

    private static BufferedImage getImage(String imagePath) throws IOException {
        File file = new File(imagePath);
        if (file == null){
            System.err.println("文件不存在");
            return null;
        }
        BufferedImage bufferedImage = null;
        //BufferedImage bufferedImage1 = null;
        bufferedImage = ImageIO.read(file);

        /*int srcWidth = bufferedImage.getWidth(null);// 原图片宽度
        int srcHeight = bufferedImage.getHeight(null);// 原图片高度
        int dstMaxSize = 90;// 目标缩略图的最大宽度/高度，宽度与高度将按比例缩写
        int dstWidth = srcWidth;// 缩略图宽度
        int dstHeight = srcHeight;// 缩略图高度
        float scale = 0;
        // 计算缩略图的宽和高
        if (srcWidth > dstMaxSize) {
            dstWidth = dstMaxSize;
            scale = (float)srcWidth / (float)dstMaxSize;
            dstHeight = Math.round((float)srcHeight / scale);
        }
        srcHeight = dstHeight;
        if (srcHeight > dstMaxSize) {
            dstHeight = dstMaxSize;
            scale = (float)srcHeight / (float)dstMaxSize;
            dstWidth = Math.round((float)dstWidth / scale);
        }
        // 生成缩略图
        bufferedImage1 = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_RGB);
        bufferedImage1.getGraphics().drawImage(bufferedImage, 0, 0, dstWidth, dstHeight, null);*/

        return bufferedImage;
    }
}

原

生成的照片

（ASCII）