Are you setting the compression for the TIFF image? If not, you should set it to the JPEG compression type. Then you have to play with the quality value to get the same compression size as the source images. What would be happening by default is the JPEG image is read and decompressed, then the decompressed data is stored in TIFF format - which is why it would be larger. You need to tell JAI to do compression. Afterwards the TIFF files will probably be a bit larger than the source because there is a certain amount of overhead involved in the TIFF format, but I wouldn't expect it to be much larger.
Yeah, but does being a ninja come with a dental plan? And what about this tiny ad?