【java】图像转码为字符画

最新推荐文章于 2024-04-28 14:28:31 发布

原创最新推荐文章于 2024-04-28 14:28:31 发布 · 2.8k 阅读

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本文介绍了一个Java程序，用于将图像文件转换成字符画文本。该程序支持自定义字符集，并能将转换后的文本保存为TXT文件。此外，还提供了一种批量处理图像的方法。

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public class ImageProcesser  {
	
	private static final char[] charset1 = {'M','8','V','|',':','.',' '};   //默认字符素材集
	private char[] charset;   //字符画素材集
	private String imgString = "";   //储存转化后的字符串
	
	
	//使用指定字符集构造
	public ImageProcesser(char[] charset){
		this.charset = charset;
	}
	//使用默认字符集构造
	public ImageProcesser(){
		this.charset = charset1;
	}
	
	public String getImgString(){
		return imgString;
	}

	/*将图形文件转化为字符画字符串*/
	public ImageProcesser toBitmapConvert(String imagepath){
		return toBitmapConvert(new File(imagepath));
	}
	public ImageProcesser toBitmapConvert(File imageFile){
		
		StringBuffer sb = new StringBuffer();
		if(!imageFile.exists()){    //当读取的文件不存在时，结束程序
			System.out.println("File is not exists!");
			System.exit(1);
		}
		Color color;
		try{
			BufferedImage buff = ImageIO.read(imageFile);   //将图片文件装载如BufferedImage流
			buff = compressImage(buff);
	
			int bitmapH = buff.getHeight();
			int bitmapW = buff.getWidth();
			
			//逐行扫描图像的像素点，读取RGB值，取其平均值，并从charset中获取相应的字符素材，并装载到sb中
			for(int y=0; y<bitmapH; y++){     		
				for(int x=0; x<bitmapW; x++){
					int rgb = buff.getRGB(x,y);
					color = new Color(rgb);
					
					int cvalue = (color.getRed()+color.getGreen()+color.getBlue()) / 3;
					sb.append(charset[(int)((cvalue * charset.length - 1)/255)]+" ");
				}
				sb.append("\r\n");
			}
		}catch(IOException ex){
			ex.printStackTrace();
		}
		imgString = sb.toString();
		return this;
	}
	
	
	/*图像文件预处理:将图片压缩到 最长边为 100px*/
	private  BufferedImage compressImage(BufferedImage srcImg){
		int h =  srcImg.getHeight();
		int w = srcImg.getWidth();
		if(Math.max(h,w)<=100)
			return srcImg;
		int new_H;
		int new_W;
		if(w>h){
			new_W = 100;
			new_H = 100*h/w ;
		}else{
			new_H = 100;
			new_W = 100*w/h;
		}
		BufferedImage smallImg = new BufferedImage(new_W,new_H,srcImg.getType());
		Graphics g = smallImg.getGraphics();
		g.drawImage(srcImg,0,0,new_W,new_H,null);
		g.dispose();
		return smallImg;
	}
	
	/*将字符串保存为.txt文件*/
	public void saveAsTxt(String fileName){
		try{
			PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(fileName)));
			for(int i = 0;i<imgString.length();i++){
				out.print(imgString.charAt(i));
			}
			out.close();
			
		}catch(IOException ex){
			ex.printStackTrace();
		}
	}
	
	/*批处理图像文件*/
	public static void batchImgFile(String srcfile, String tragetfile){
		
		File folder = new File(tragetfile);   //生成图片的文件夹
		File srcfolder = new File(srcfile); 
		if(!folder.exists() || !folder.isDirectory())
			folder.mkdirs();
		ImageProcesser processer = new  ImageProcesser();
		File[] filelist = srcfolder.listFiles();
		
		for(int i=0;i<filelist.length;i++){
			if(!filelist[i].isFile())
				continue;
			processer.toBitmapConvert(filelist[i]);
			processer.saveAsTxt(tragetfile+"/"+(i+1)+".txt");
			System.out.println(filelist[i].getName()+" is converted!");
		}
		System.out.println("All img were converted!");
		
	}
	


}

github地址：https://github.com/Al-assad/ASCII-Animation