* ConTeXt support for DjVu backend
@ 2011-06-22 19:44 Kip Warner
2011-06-22 19:51 ` Hans Hagen
2011-06-22 20:24 ` Pontus Lurcock
0 siblings, 2 replies; 10+ messages in thread
From: Kip Warner @ 2011-06-22 19:44 UTC (permalink / raw)
To: ntg-context
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Hey list,
Are there any plans to eventually support the DjVu format as an
additional backend alternative to PDF? DjVu is a free standard promoted
as an alternative to PDF. It is allegedly a superior format.
<https://secure.wikimedia.org/wikipedia/en/wiki/DjVu>
--
Kip Warner -- Software Engineer
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http://www.thevertigo.com
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* Re: ConTeXt support for DjVu backend
2011-06-22 19:44 ConTeXt support for DjVu backend Kip Warner
@ 2011-06-22 19:51 ` Hans Hagen
2011-06-22 20:32 ` Kip Warner
2011-06-22 20:24 ` Pontus Lurcock
1 sibling, 1 reply; 10+ messages in thread
From: Hans Hagen @ 2011-06-22 19:51 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Kip Warner
On 22-6-2011 9:44, Kip Warner wrote:
> Hey list,
>
> Are there any plans to eventually support the DjVu format as an
> additional backend alternative to PDF? DjVu is a free standard promoted
> as an alternative to PDF. It is allegedly a superior format.
>
> <https://secure.wikimedia.org/wikipedia/en/wiki/DjVu>
it's mostly an image format (efficient storage of scanned documents) and
in that sense it's an alternative (jbig2 is another candidate)
Hans
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: ConTeXt support for DjVu backend
2011-06-22 19:51 ` Hans Hagen
@ 2011-06-22 20:32 ` Kip Warner
2011-06-22 21:27 ` Hans Hagen
0 siblings, 1 reply; 10+ messages in thread
From: Kip Warner @ 2011-06-22 20:32 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
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On Wed, 2011-06-22 at 21:51 +0200, Hans Hagen wrote:
> it's mostly an image format (efficient storage of scanned documents) and
> in that sense it's an alternative (jbig2 is another candidate)
>
> Hans
That's what I was thinking too at first, that's it's mostly for scanned
documents. But since it is trying to be a replacement for PDF and it has
most of the same features, I think it's more than just that now.
--
Kip Warner -- Software Engineer
OpenPGP encrypted/signed mail preferred
http://www.thevertigo.com
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* Re: ConTeXt support for DjVu backend
2011-06-22 20:32 ` Kip Warner
@ 2011-06-22 21:27 ` Hans Hagen
2011-06-22 21:31 ` Kip Warner
0 siblings, 1 reply; 10+ messages in thread
From: Hans Hagen @ 2011-06-22 21:27 UTC (permalink / raw)
To: Kip Warner; +Cc: mailing list for ConTeXt users
On 22-6-2011 10:32, Kip Warner wrote:
> On Wed, 2011-06-22 at 21:51 +0200, Hans Hagen wrote:
>> it's mostly an image format (efficient storage of scanned documents) and
>> in that sense it's an alternative (jbig2 is another candidate)
>>
>> Hans
>
> That's what I was thinking too at first, that's it's mostly for scanned
> documents. But since it is trying to be a replacement for PDF and it has
> most of the same features, I think it's more than just that now.
- the starting point is scanned images
- there can be an ocr layer but still the image is the core
- pdf is more: colorspaces, vector graphics, annotations, etc
So, a djvu document would be less sophisticated. It might not matter for
many cases, and one could probably make a backend to produce something
reasonable but it's not worth the trouble I fear. As mentioned, it's
probably easier to convert the pdf into a djvu with a postprocessor.
Hans
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tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: ConTeXt support for DjVu backend
2011-06-22 21:27 ` Hans Hagen
@ 2011-06-22 21:31 ` Kip Warner
2011-06-22 21:36 ` Hans Hagen
0 siblings, 1 reply; 10+ messages in thread
From: Kip Warner @ 2011-06-22 21:31 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
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On Wed, 2011-06-22 at 23:27 +0200, Hans Hagen wrote:
> - the starting point is scanned images
> - there can be an ocr layer but still the image is the core
> - pdf is more: colorspaces, vector graphics, annotations, etc
>
> So, a djvu document would be less sophisticated. It might not matter for
> many cases, and one could probably make a backend to produce something
> reasonable but it's not worth the trouble I fear. As mentioned, it's
> probably easier to convert the pdf into a djvu with a postprocessor.
>
> Hans
Understood. Thanks.
--
Kip Warner -- Software Engineer
OpenPGP encrypted/signed mail preferred
http://www.thevertigo.com
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: ConTeXt support for DjVu backend
2011-06-22 21:31 ` Kip Warner
@ 2011-06-22 21:36 ` Hans Hagen
2011-06-22 21:38 ` Kip Warner
2011-06-22 22:05 ` Pontus Lurcock
0 siblings, 2 replies; 10+ messages in thread
From: Hans Hagen @ 2011-06-22 21:36 UTC (permalink / raw)
To: Kip Warner; +Cc: mailing list for ConTeXt users
On 22-6-2011 11:31, Kip Warner wrote:
> On Wed, 2011-06-22 at 23:27 +0200, Hans Hagen wrote:
>> - the starting point is scanned images
>> - there can be an ocr layer but still the image is the core
>> - pdf is more: colorspaces, vector graphics, annotations, etc
>>
>> So, a djvu document would be less sophisticated. It might not matter for
>> many cases, and one could probably make a backend to produce something
>> reasonable but it's not worth the trouble I fear. As mentioned, it's
>> probably easier to convert the pdf into a djvu with a postprocessor.
>>
>> Hans
>
> Understood. Thanks.
btw, it would be interesting to have a good open source jbig2 producer
(as that is natively supported in pdf) and it's a pretty efficient
compression (close to djvu)
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Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: ConTeXt support for DjVu backend
2011-06-22 21:36 ` Hans Hagen
@ 2011-06-22 21:38 ` Kip Warner
2011-06-22 22:05 ` Pontus Lurcock
1 sibling, 0 replies; 10+ messages in thread
From: Kip Warner @ 2011-06-22 21:38 UTC (permalink / raw)
To: Hans Hagen; +Cc: mailing list for ConTeXt users
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On Wed, 2011-06-22 at 23:36 +0200, Hans Hagen wrote:
> btw, it would be interesting to have a good open source jbig2
> producer
> (as that is natively supported in pdf) and it's a pretty efficient
> compression (close to djvu)
Interesting.
--
Kip Warner -- Software Engineer
OpenPGP encrypted/signed mail preferred
http://www.thevertigo.com
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* Re: ConTeXt support for DjVu backend
2011-06-22 21:36 ` Hans Hagen
2011-06-22 21:38 ` Kip Warner
@ 2011-06-22 22:05 ` Pontus Lurcock
2011-06-22 22:20 ` Hans Hagen
1 sibling, 1 reply; 10+ messages in thread
From: Pontus Lurcock @ 2011-06-22 22:05 UTC (permalink / raw)
To: ntg-context
On Wed 22 Jun 2011, Hans Hagen wrote:
> btw, it would be interesting to have a good open source jbig2
> producer
I believe https://github.com/agl/jbig2enc is open source, but I don't
know whether it fulfils your other criterion of being good.
Pont
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* Re: ConTeXt support for DjVu backend
2011-06-22 22:05 ` Pontus Lurcock
@ 2011-06-22 22:20 ` Hans Hagen
0 siblings, 0 replies; 10+ messages in thread
From: Hans Hagen @ 2011-06-22 22:20 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 23-6-2011 12:05, Pontus Lurcock wrote:
> On Wed 22 Jun 2011, Hans Hagen wrote:
>
>> btw, it would be interesting to have a good open source jbig2
>> producer
>
> I believe https://github.com/agl/jbig2enc is open source, but I don't
> know whether it fulfils your other criterion of being good.
aha, so someone picked up that thread (years ago, when Hartmut and I
looked into it it was rather messy to compile it due to depedencies)
looks like a challenge for Luigi (nice topic for context conference too)
Hans
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| www.pragma-pod.nl
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* Re: ConTeXt support for DjVu backend
2011-06-22 19:44 ConTeXt support for DjVu backend Kip Warner
2011-06-22 19:51 ` Hans Hagen
@ 2011-06-22 20:24 ` Pontus Lurcock
1 sibling, 0 replies; 10+ messages in thread
From: Pontus Lurcock @ 2011-06-22 20:24 UTC (permalink / raw)
To: ntg-context
On Wed 22 Jun 2011, Kip Warner wrote:
> Are there any plans to eventually support the DjVu format as an
> additional backend alternative to PDF? DjVu is a free standard promoted
> as an alternative to PDF. It is allegedly a superior format.
There's always http://code.google.com/p/pdf2djvu/ in lieu of a direct
backend...
Pont
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2011-06-22 19:44 ConTeXt support for DjVu backend Kip Warner
2011-06-22 19:51 ` Hans Hagen
2011-06-22 20:32 ` Kip Warner
2011-06-22 21:27 ` Hans Hagen
2011-06-22 21:31 ` Kip Warner
2011-06-22 21:36 ` Hans Hagen
2011-06-22 21:38 ` Kip Warner
2011-06-22 22:05 ` Pontus Lurcock
2011-06-22 22:20 ` Hans Hagen
2011-06-22 20:24 ` Pontus Lurcock
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