Yes, converting from JPG to TIFF would have the quality of a JPG and (I 
believe) the file size of a TIFF.

On 4/26/13 4:19 PM, James Gilbert wrote:
> I'm by no means an expert in the math behind image format conversions...
> but:
>
> When converting to TIFF-to-JPG, TIFF is uncompressed formatting and JPG is
> compressed format.
>
> When back converting, wouldn't the original quality of TIFF would be lost,
> converted only to the quality of the last JPG (with degradation on each time
> this process occurs)?
>
> James Gilbert, BS, MLIS
> Systems Librarian
> Whitehall Township Public Library
> 3700 Mechanicsville Road
> Whitehall, PA 18052
> 610-432-4339 ext: 203
>
> -----Original Message-----
> From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Roy
> Sent: Friday, April 26, 2013 4:15 PM
> To: [log in to unmask]
> Subject: Re: [CODE4LIB] tiff2pdf, then back to pdf?
>
> If you can stand an extrastep, Ed, there are tools to convert PDF to jpg
> images, and from there it shouldn't be too hard to get TIFF output. Do a
> search for "convert PDF to image" to get started. There are tools that are
> not online only, which I'm pretty sure is what you're after.
>
> Roy Zimmer
> Western Michigan University
>
>
> On 4/26/2013 4:08 PM, Edward M. Corrado wrote:
>> Hi All,
>>
>> I have a need to batch convert many TIFF images to PDF. I'd then like
>> to be able to discard the TIFF images, but I can only do that if I can
>> create the original TIFF again from the PDF. Is this possible? If so,
>> using what tools and how?
>>
>> tiff2pdf seems like a possible solution, but I can't find a
>> corresponding "pdf2tif" program that reverses the process.
>>
>> Any ideas?
>>
>> Edward

-- 
Steve Cherry
Electronic Services Librarian
The Catholic University of America
202-319-6433