Question about PDF manipulation

[Bjørn Vermo]

On 3 Jun, 2005, at 08:15, Eric Smith wrote:

> Jan-Benedict Glaw wrote:
>> You didn't answer my question:-)  Consider I prepare a TIFF file that
>> contains (with additional tags) eg. some raw OCRed text, not
>> read-checked. Now I preapre a PDF from this and use gs to get the 
>> image
>> back.  Is my text still there?
>
> Depends on whether the program you use to prepare the PDF file from the
> TIFF file knows about those "additional tags" and does something with
> them.

TIFF is another of those hopelessly cludgey formats I prefer to avoid 
whenever possible. I doubt there exists any image viewer which is able 
to display all the possible permutations that can be called "TIFF".

PNG is a more modern format, made after people had enough bad 
experiences with other formats. It is designed to be free of any 
patents or restrictions, and is generally available.

If the idea is to make something which can be useful for posterity, it 
makes more sense to use a well-documented format with a rational set of 
variations than something which grew as a series of ad-hoc solutions.

-- 
-bv