tiff2pdf looses information?

[Matt Beals]

There's a thumbnail stored, usually image alternates are there to speed up
display. Displaying the image doesn't generally entail decompressing the
image in the PDF viewer. But you do have to load the entire page if it is
optimized for web. Otherwise you have to download the complete PDF. Which is
almost counter-PDF. The whole idea being that any PDF viewer on any platform
can view the contents and that each page is a self-contained document that
doesn't need resources from other pages to be rendered.

Matt Beals
Consultant
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> From: Paul Smith <phhs80 at gmail.com>
> Reply-To: "For users of Fedora Core releases <fedora-list at redhat.com>"
> <fedora-list at redhat.com>
> Date: Sun, 13 Aug 2006 13:02:50 +0100
> To: For users of Fedora Core releases <fedora-list at redhat.com>
> Subject: Re: tiff2pdf looses information?
> 
> On 8/13/06, Matt Beals <matt at mattbeals.com> wrote:
>> A PDF can most certainly use image compression. Most often it uses medium
>> quality JPEG. Depending on how the conversion occurs it can also down sample
>> the image resolution to 150 dpi. There are several different compression
>> methods that could be used: None, LZW, 4bit ZIP, 8bit ZIP, JPEG, JPEG2000,
>> JBIG, CCITTG4, CCITTG3. All depends on how the software is configured.
> 
> Thanks, Matt. I was thinking about something like an embodied (in pdf
> viewers) unzip program. When viewing a pdf document with an image, the
> image would be decompressed  before putting it on the screen.
> 
> Paul
> 
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