Paint Shop Pro support - Is Multipage JPEG Possible?

Author

Is Multipage JPEG Possible?

rajesh

2005-02-17, 6:51 pm

hi,
I wanted to know if multipage JPEG is supported by JPEG specs.I have
come across many viewers like IrfanView for example,but they all
support multipage TIFF,but not multipage jpegs.Can anyone tell me why
,that is why it isnt supported,and if it is,please let me know.Thanks

Rajesh

Fred Hiltz

2005-02-17, 6:51 pm

rajesh wrote:
> hi,
> I wanted to know if multipage JPEG is supported by JPEG specs.I
> have come across many viewers like IrfanView for example,but they
> all support multipage TIFF,but not multipage jpegs.Can anyone
> tell me why ,that is why it isnt supported,and if it is,please
> let me know.Thanks

I will try to be careful with terms here, as we often use them
loosely. JPEG is a standardized method for encoding images. JFIF is
a format specification in which one JPEG-coded image and other
optional items like a thumbnail and EXIF data are written into a
file. See http://www.w3.org/Graphics/JPEG/. TIFF is another format
specification that permits several JPEG images, among many other
things.

As to why just one image per file, I have never read the reasoning
that the standards committee employed. You might be able to find
minutes with a search for JFIF, but that all happened long ago.
--
Fred Hiltz, fhiltz at yahoo dot com

rajesh

2005-02-18, 4:21 am

"Fred Hiltz" <not@home.ca> wrote in message news:<08Sdnd5rDunAN4nfRVn-hw@adelphia.com>...
> rajesh wrote:
>
> I will try to be careful with terms here, as we often use them
> loosely. JPEG is a standardized method for encoding images. JFIF is
> a format specification in which one JPEG-coded image and other
> optional items like a thumbnail and EXIF data are written into a
> file. See http://www.w3.org/Graphics/JPEG/. TIFF is another format
> specification that permits several JPEG images, among many other
> things.
>
> As to why just one image per file, I have never read the reasoning
> that the standards committee employed. You might be able to find
> minutes with a search for JFIF, but that all happened long ago.

Thanks Fred for the response.But I wanted to get multiple JPEG images
into one jpeg file.ANy ideas for that,and plus what do you think will
be the pros and cons if this is implemented.Thanks in advance

Rajesh

Coder Droid

2005-02-18, 4:21 am

> Thanks Fred for the response.But I wanted to get multiple JPEG images
> into one jpeg file.

I think Fred is aware of that. Please read his reply again.

> ANy ideas for that

Can't be done. That just isn't part of the file format specification.

--cd

Carl Frisk

2005-02-18, 4:21 am

Then you need to submit a change to the JFIF-JPEG File Interchange Format.
http://www.faqs.org/faqs/graphics/f...section-78.html
Scott Sinclair would be the one to talk to first I believe. Good luck.

--
....Carl Frisk
Anger is a brief madness.
- Horace, 20 B.C.
http://www.carlfrisk.com

"rajesh" <rajesh.ambadath@wipro.com> wrote in message news:30b8e6d9.0502172113.52b92abc@posting.google.com...
> "Fred Hiltz" <not@home.ca> wrote in message news:<08Sdnd5rDunAN4nfRVn-hw@adelphia.com>...
>
> Thanks Fred for the response.But I wanted to get multiple JPEG images
> into one jpeg file.ANy ideas for that,and plus what do you think will
> be the pros and cons if this is implemented.Thanks in advance
>
> Rajesh

Jules

2005-02-18, 6:33 pm

On Thu, 17 Feb 2005 21:13:42 -0800, rajesh wrote:
> Thanks Fred for the response.But I wanted to get multiple JPEG images
> into one jpeg file.ANy ideas for that,and plus what do you think will
> be the pros and cons if this is implemented.Thanks in advance

I don't believe that it can be done. Couple of alternative options:

1) Use TIFF images instead

2) Package your JPEG images up in an archive* and let whoever you're
distributing them to extract them

*tar preferred personally. Programs like Winzip will read tar archives on
an MS platform. tar on other systems doesn't read zip files. Plus there's
no point in using a compressed archive (such as zip) anyway as JPEG
compression is pretty efficient.

Any good software will read TIFF files that encapsulate several TIFF
images, although maybe wrapping individual files within an archive makes
it more obvious that there are multiple images present :)

cheers

Jules

Jeremy

2005-02-18, 6:33 pm

"rajesh" <rajesh.ambadath@wipro.com> wrote in message
>
> Thanks Fred for the response.But I wanted to get multiple JPEG images
> into one jpeg file.ANy ideas for that,and plus what do you think will
> be the pros and cons if this is implemented.Thanks in advance
>

The Xerox "XIF" format (a proprietary imaging format used in their Pagis Pro
scanner and archiving software) had the ability to store multiple pages of
JPEGS, but one required the XIF viewer to decode them.

I do not believe that it is possible to link multiple jpeg files together
and view them the way one would view a multipage TIFF file.

If you absolutely must store multiple JPEGS in a single file, you could ZIP
them, but they would have to be unzipped and manipulated as separate files
whenever they are viewed or otherwise used.