01-25-2010, 11:12 PM
M A V I C wrote:
[quote=Seacrest]
PDFs can subsume TIFF data and also use the same compression algorithms, so the size issue is likely a wash.
It depends on the software used and the circumstances. For example, I just used a one page text doc as a test. It's grayscale. I saved it as a PDF @ 300ppi JPEG and it comes out 2.1MB. I saved it as a TIFF @ 300ppi and it comes out as 7.6MB. Now take that TIFF and zip it and it's 459KB.
Zip the PDF and it's 1.8MB.
Save the PDF as ZIP and it comes out as 545KB. So there's a 15-20% difference between saving a PDF with zip compression and zipping a TIFF of the same file, res...
Yeah, that must be PDF data, not the tiff data.
PDF will use ZIP or LZW compression on the bitmap data from the TIFF file, but there could be a lot of PDF-specific data in what you're saving.