combining tif files with java

[Chuck Cabrera]

Hello
Does anyone know how to combine tif files using java (or any other tool). For example I have a CD where someone has scanned multiple page documents into a tif format. The users want the multiple page documents combined into 1 document.
Thanks

[Anonymous]

Hi Chuck,
You may use Java Advanced Imaging (JAI).
This API works well on most file formats, and handles correctly TIFF pages.
To do what you need, you may use the following snippet, assuming you want to save the output images as tiff:

import com.sun.media.jai.codec.*;
import javax.media.jai.NullOpImage;
import javax.media.jai.OpImage;
import javax.media.jai.PlanarImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class TestJAI {
    public void processTIFF(String filename) throws IOException {
        PlanarImage image;
        File file = new File(filename);
        SeekableStream stream = new FileSeekableStream(file);
        TIFFDecodeParam decodeParam = null;
        ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", stream, decodeParam);
        int numPages = decoder.getNumPages();
        for (int i = 0; i < numPages; i++) {
            image = new NullOpImage(decoder.decodeAsRenderedImage(i), null, OpImage.OP_IO_BOUND, null);
            String newFileName = (i + 1) + ".tiff";
            FileOutputStream fos = new FileOutputStream(newFileName);
            TIFFEncodeParam encodeParam = null;
            ImageEncoder encoder = ImageCodec.createImageEncoder("tiff", fos, encodeParam);
            encoder.encode(image);
            fos.close();
        }
    }
}

[Anonymous]

I forgot to mention that if you're using the Java 2 SDK 1.4, you may also use the ImageIO APIs.
To get the number of images use ImageReader.getNumImages and to retrieve one single image ImageReader.read(int imageIndex).
Hope this provides usefull.

[Chuck Cabrera]

Beno�t
Thank you very much. Your example pointed me in
the right direction.
Chuck