Progress on dewarping functionality

[daniel_reetz]

I posted this to news:

http://www.diybookscanner.org/news/?p=102

[Tulon]

Another progress update video.

I've finished the manual dewarping and demonstrating some promising work in progress on the automated one.

[daniel_reetz]

I blogged it and donated some beer money. Thank you, Tulon! This is really great work.

[Hamid]

Thks for the video and your work Tulon.

[rob]

Wow, Tulon, that is some impressive work! I really like the debug feature!

--Rob

[Misty]

Really impressive work, Tulon! The progress you're showing in the video is just incredible.

[Tulon]

Thanks guys.

I really like the debug feature!

That would be great, Rob! The code is in Git. Feel free to hack on it and ask questions.
BTW, I will probably need your help on the maths front soon. I am going to try to approximate the text lines with X-Splines. I already figured out how to do it if you can pre-assign tension factors to each control point and t values for each sample. I used this paper for inspiration. It's about B-splines, but it's straightforward to apply it to an X-Spline with hardcoded tension factors. It's already implemented in XSpline::fit() [warning: severe lack of documentation] and there is a commented out example somewhere in the source code. Now, while hardcoding tension factors is fine, pre-assigning t values is generally not. If I don't, I believe the problem will become a non-linear least squares one. That's something beyond my maths skills, but I know you can do it. Take a look at this paper as well. It may be an overkill for our purposes, but who knows. It's about B-splines again, but might be applicable to X-splines.

[knappen]

I too made a donation. I consider it a pleasure to be able to show a token a gratitude for the effort you are putting into this project. Looking forward to the automatized dewarping!

[ArchCarrier]

So, I've made another progress update video and a test build you may try out.

The test build page only shows a link to a .torrent file. But there are no seeders. Can anyone post another link to this build? I'd really like to try out the new functions.

[Tulon]

Reuploaded