We are converting TIFF G4 (bitonal) images to PDF. This works fine but the resultant PDF is very much larger than the original TIFF file. For example, one customer has TIFF G4 A3 10 page documents at 600dpi which is about 7mb. When converted to PDF it is over 50mb, which is a problem.
What I think is happening is that the bitonal image is being converted to something like a 32 bit image and then put into the PDF.
I would expect/hope that the PDF is only slightly larger than the source TIFF, probably by keeping the image pretty much as is and placing it into the PDF.
I am using aspose-imaging 21.2 jdk16, though I was originally using slightly earlier versions. I have also hunted through the Java docs and tried various things to preserve the original image compression, all without success.
Any help much appreciated, Mark.