Binding Tesseract as a static Lib in Xamarin

Question

I am trying to add tesseract to my iOS-App. Im doing the App with Xamarin.iOS. I tried creating a .dll with btouch and used for that the ported version of tesseract on github(https://github.com/gali8/Tesseract-OCR-iOS). I created the bindings of tesseractOCR.h with Objective-Sharpie and created a .dll with the TesseractOCR.a file. Everything worked fine but when trying to build my app with the .dll referenced it gives me the attached Errors.

https://www.dropbox.com/s/w9cvzozgw4gffdx/Screen%20Shot%202014-03-31%20at%2012.46.24.png

How can I fix them?

Thanks in advance Alex

Answer 1

This seems a good question and I came here looking for Xamarin bindings for Tesseract library, but there was none on this page. After searching, I found that there are a couple of bindings already for Xamarin:

Classic 1. https://github.com/sraiteri/Xamarin-Tesseract-OCR-iOS

Unified 2. https://github.com/jherby2k/Xamarin-Tesseract-OCR-iOS-Unified

Xamarin Forms 3. https://github.com/halkar/Tesseract.Xamarin

Also, there seems to be an active and modern porting to swift, and can be found here: https://github.com/WhitneyLand/SwiftOpenCV

This discussion on Xamarin forum seems also very useful for anybody interested in this question:

https://forums.xamarin.com/discussion/3673/help-adding-tesseract-as-a-ios-binding-project

Disclaimer: I have not tried any of them yet, just finished my research, now gonna start my experimentation :)

Answer 2

This is because Tesseract uses c++ and the binding needs to know this.

I would suggest creating a binding project as per the tutorial at Xamarin. Then this Xamarin forum post gives great information on how to add c++ to the LinkWith attribute.