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 <sam(a)samwilson.id.au>au>:
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 <sam(a)samwilson.id.au> 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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