Combine multiple images with mosaic JAI

[Theodore David Williams]

I am reading in some images and trying to use the mosaic descriptor JAI class to combine these images.

List<RenderedImage> images = ......;  // List of all my images
for (RenderedImage image : images) {
   paramBlock.addSource(image);
}
paramBlock.set("mosaicType", MosaicDescriptor.MOSAIC_TYPE_BLEND);
JAI.create("mosaic", paramBlock);

The problem I am having is that I do not know how to set the origin of each image such that they show up in the correct place when combined.

Anyone used JAI to combine images?

Thanks