How to combine two or many tiff image files in to one multipage tiff image in JAVA

Question

I have 5 single page tiff images. I want to combine all these 5 tiff images in to one multipage tiff image. I am using Java Advanced Imaging API. I have read the JAI API

Answer 1

I hope you have the computer memory to do this. TIFF image files are large.

You're correct in that you need to use the Java Advanced Imaging (JAI) API to do this.

First, you have to convert the TIFF images to a java.awt.image.BufferedImage. Here's some code that will probably work. I haven't tested this code.

BufferedImage image[] = new BufferedImage[numImages];
for (int i = 0; i < numImages; i++) {
    SeekableStream ss = new FileSeekableStream(input_dir + file[i]);
    ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", ss, null);
    PlanarImage op = new NullOpImage(decoder.decodeAsRenderedImage(0), null, null, OpImage.OP_IO_BOUND);
    image[i] = op.getAsBufferedImage();
}

Then, you convert the BufferedImage array back into a multiple TIFF image. I haven't tested this code either.

TIFFEncodeParam params = new TIFFEncodeParam();
OutputStream out = new FileOutputStream(output_dir + image_name + ".tif"); 
ImageEncoder encoder = ImageCodec.createImageEncoder("tiff", out, params);
Vector vector = new Vector();   
for (int i = 0; i < numImages; i++) {
    vector.add(image[i]); 
}
params.setExtraImages(vector.listIterator(1)); // this may need a check to avoid IndexOutOfBoundsException when vector is empty
encoder.encode(image[0]); 
out.close(); 

Good luck.