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("rn");
}
}
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!");
}
}