It's a pretty cool format. :)


I have got the beginnings of a PHP rewrite of your python script
running https://github.com/Tpt/ia-upload/pull/18 (but it's not at all
finished yet).


What is the best way to decrease the size of the jpgs before creating
the djvu? Just scale them to ~1000 px or something? How do you handle
that? (Sorry, I've read your code, but am confused...) I'm using
imagemagick to do it, so any transformation it can do is easy to
implement.


—Sam



On Fri, 27 Jan 2017, at 03:24 PM, Alex Brollo wrote:

> Yes, presently IA jp2.zip are the source files for all derived ones
> and for OCR. All the derived ones are omologous - t.i. *relative*
> coordinates of any element inside images are identical, even if image
> size varies. This means that mapping of elements (images or text) can
> be exported into any derived file.
> 

> Just an example: when an user crops an image from a djvu file by the
> excellent CropTool by Danmichaelo, coordinated of the cropping  could
> be used to crop high-resolution jp2 or jpg image, or to get
> coordinates of any piece of  text mapped by OCR.
> 

> Alex

> 

> 

> 

> 

> 

> 

> 

> 2017-01-27 0:53 GMT+01:00 Sam Wilson <[email protected]>:

>> __

>> Good to know, thanks!

>> 

>> So, we just stick with jp2.zip

>> 

>> And I love the IA magic :)

>> 

>> 

>> On Fri, 27 Jan 2017, at 07:40 AM, Andrea Zanni wrote:

>>> AFAIK, IA always produce the jp2 files by himself.

>>> I suggest GLAMs to upload zipped folders of jpegs, 

>>> so IA can do his magic and produce a book viewer and a PDF as well
>>> as the jp2.
>>> 

>>> On Fri, Jan 27, 2017 at 12:10 AM, Sam Wilson <[email protected]>
>>> wrote:
>>>> __

>>>> 

>>>> 

>>>> 

>>>> On Thu, 26 Jan 2017, at 06:35 PM, Andrea Zanni wrote:

>>>>> The problem for me is that librarians and other people who are
>>>>> genuinely interested in Wikisource and IA
>>>>> don't understand why

>>>>> * they upload a good scan on IA

>>>>> * see a good book on IA, via the viewer

>>>>> * get an horrible djvu on Wikisource. 

>>>>> 

>>>>> This is the issue we should try to solve, otherwise we will lose a
>>>>> potential important ally, content and new userbase.
>>>>> Aubrey

>>>>> 

>>>> 

>>>> 

>>>> Definitely!

>>>> 

>>>> On a related note: most (all?) IA-scanned books have e.g. *_jp2.zip
>>>> files containing all the original scan images, but is there any
>>>> standard for user-uploaded books? Like your librarians above, I
>>>> assume they're uploading individual jpg/png files? Do these get
>>>> combined into a single zip? I'm thinking that they don't, and that
>>>> ia-upload needs to provide the option of using any of the following
>>>> sources:
>>>>  * .djvu
>>>>  * _jp2.zip (there's also _jpg.zip and _raw_jp2.zip, but I guess we
>>>>    don't need to use them?)
>>>>  * *.jpg + *.jp2 + *.png (i.e. use all images in the item, apart
>>>>    from _cover_image.jpg)
>>>>  * .pdf
>>>> 

>>>> Sound complete? Or are there other ways?

>>>> 

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>>>> 

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>> 

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