Check corrupted jpeg files in java

Question

I need a quick Java way to check if a JPEG file is valid or is it a truncated / damaged image.

I tried to do this in several ways:

• using javax.ImageIO library

  public boolean check(File image) throws IOException {
      try {
          BufferedImage bi = ImageIO.read(image);
          bi.flush();
      } catch (IIOException e) {
          return false;
      }
      return true;
  }
  

  but it can detect only a few damaged files from those that I tested, and it is very slow (on my computer about 1 image per second).

• Apache Commons Image Library

  public boolean check(File image) throws IOException {
      JpegImageParser parser = new JpegImageParser();
      ByteSourceFile bs = new ByteSourceFile(image);
      try {
          BufferedImage bi = parser.getBufferedImage(bs, null);
          bi.flush();
  
          return true;
      } catch (ImageReadException e) {
          return false;
      }
  }
  

  This code can detect all corrupted images that I tested, but the performance is very low (on my computer less than 1 image per second).

I am looking for a Java alternative for the UNIX jpeginfo program , which is about 10 times faster (about 10 images per second on my computer).

Answer 1

JPEG, , , EOI ( ) (FF D9) .

boolean jpegEnded(String path) throws IOException {
    try (RandomAccessFile fh = new RandomAccessFile(path, "r")) {
        long length = fh.length();
        if (length < 10L) { // Or whatever
            return false;
        }
        fh.seek(length - 2);
        byte[] eoi = new byte[2];
        fh.readFully(eoi);
        return eoi[0] == -1 && eoi[1] == -23; // FF D9
    }
}

Answer 2

, , ...

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:

• Java- ++ (C ) JNI (Java Native Interface).
• ++ java-.

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Answer 3

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Answer 4

Java-, , jpeginfo imagemagick ident - , Java.

- , , Runtime.exec identify -regard-warnings -verbose - stdin , macbook mac 2013 200 ( mp3, 300x300px). , , 1 !

( -verbose imagemagick, )