No transformation from alto3.0 (from Tesseract 4.1.0) to hocr about ocr-fileformat HOT 6 CLOSED

After the error message in the usage information you see the available transformations. Currently there are only alto2.0/alto2.1 to hocr transformations. Try to change the namespace of your file

+<alto xmlns="http://www.loc.gov/standards/alto/ns-v2#" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/standards/alto/ns-v3# http://www.loc.gov/alto/v3/alto-3-0.xsd">
-<alto xmlns="http://www.loc.gov/standards/alto/ns-v3#" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/standards/alto/ns-v3# http://www.loc.gov/alto/v3/alto-3-0.xsd">

and then use

ocr-transform alto2.0 hocr < alto.xml

I will create an issue upstream to support also other versions of alto in the transformations.

from ocr-fileformat.

ALTO v3 & v4 should be supported now.

from ocr-fileformat.

Have you tried https://github.com/filak/hOCR-to-ALTO/blob/master/alto__hocr.xsl ?

from ocr-fileformat.

I have seen the changes because they broke our test case in one PR. Therefore we switched to a fixed commit instead of the newest version always. But this is still on my todo list. Maybe I can do this now...

The different files alto*__hocr look almost identical. Therefore I would instead try to make a more generalized transformation alto__hocr which is applicable to alto files of different version. Should I try to do that as a PR?

We need to change then some things than here in order to integrate the new file names, but that can be done afterwards.

from ocr-fileformat.

I can confirm the transformation of the @jtlz2's file works now with the latest version https://github.com/filak/hOCR-to-ALTO/blob/master/alto__hocr.xsl

from ocr-fileformat.

Yes, thank you. This is updated in e0d9250, which is now part of v0.3.0.

from ocr-fileformat.