Question on how to use Leptonica

[pripple]

Hi, I was looking for a solution for occasionally de-warping text images scanned from books and I found this showcase of Leptonica’s abilities: https://tpgit.github.io/UnOfficialLeptDocs/leptonica/dewarping.html

Sorry for maybe asking a totally dumb question. You might open up a new world for me with your answer. I don’t understand so far if the green lines tracking the text lines have been manually drawn or result of an analysis performed by the library. I also don’t understand how to access these functions. Somewhere a CLI utility was mentioned, but if I understand correctly, there is no CLI utility, but the library has to be used inside some development environment. As I have found no other place, I’m asking here if anyone could give me first directions on what steps would be necessary to perform de-warping as described in the linked article. I’m using a Mac, so would I have to look into how to use XCode?

I would appreciate very much if some clue on how to use the Library for the showcased image manipulations was added at an easily spottable place.

Thanks, take care –

Lorenz

[DanBloomberg]

That documentation is about 15 years old.

To see this utility in action, you can run any of the dewarp* programs in the prog directory.

For example, dewarptest1.
This will generate a lot of images showing what is computed in much more detail than the documentation page.
Look at the code. You will see that it writes out many images in subdirectories of /tmp/lept/