I need a binding for tesseract.  It has a C interface, so it should be doable.

Has anyone already done it?

Is there a tutorial on how to create a binding? I've seen bcd.gen but it seems old: it won't compile with my dmd version.

Am 06.02.2013 13:16, schrieb Andrea Fontana:
> I need a binding for tesseract.  It has a C interface, so it should be doable.
> 
> Has anyone already done it?
> 
> Is there a tutorial on how to create a binding? I've seen bcd.gen but it seems old: it won't compile with my dmd version.
> 

Translating this file: http://code.google.com/p/tesseract-ocr/source/browse/trunk/api/capi.h

Into D, wrapped with extern(C) should do it.

I played around with pytesser a while ago: http://code.google.com/p/pytesser/source/browse/trunk/pytesser.py

This calls the tesseract executable, maybe that is easier.

Yes, but I never did a "translation". Any manual/tutorial/help about this?

On Wednesday, 6 February 2013 at 12:25:37 UTC, David wrote:
> Am 06.02.2013 13:16, schrieb Andrea Fontana:
>> I need a binding for tesseract.  It has a C interface, so it should be
>> doable.
>> 
>> Has anyone already done it?
>> 
>> Is there a tutorial on how to create a binding? I've seen bcd.gen but it
>> seems old: it won't compile with my dmd version.
>> 
>
> Translating this file:
> http://code.google.com/p/tesseract-ocr/source/browse/trunk/api/capi.h
>
> Into D, wrapped with extern(C) should do it.
>
> I played around with pytesser a while ago:
> http://code.google.com/p/pytesser/source/browse/trunk/pytesser.py
>
> This calls the tesseract executable, maybe that is easier.

On 2013-02-06 13:16, Andrea Fontana wrote:
> I need a binding for tesseract.  It has a C interface, so it should be
> doable.
>
> Has anyone already done it?
>
> Is there a tutorial on how to create a binding? I've seen bcd.gen but it
> seems old: it won't compile with my dmd version.
>

There's a tool for that:

https://github.com/jacob-carlborg/dstep

-- 
/Jacob Carlborg

It won't compile on ubuntu 12.10 64bit alternatives?

On Wednesday, 6 February 2013 at 13:46:11 UTC, Jacob Carlborg wrote:
> On 2013-02-06 13:16, Andrea Fontana wrote:
>> I need a binding for tesseract.  It has a C interface, so it should be
>> doable.
>>
>> Has anyone already done it?
>>
>> Is there a tutorial on how to create a binding? I've seen bcd.gen but it
>> seems old: it won't compile with my dmd version.
>>
>
> There's a tool for that:
>
> https://github.com/jacob-carlborg/dstep

Am 06.02.2013 14:29, schrieb Andrea Fontana:
> Yes, but I never did a "translation". Any manual/tutorial/help about this?
> 

Well, you need a basic C knowledge to translate it and there is this guide: http://dlang.org/interfaceToC.html

If you need more help you can join #D on irc.freenode.net, helping with a realtime chat is easier than over these "forums"

That seems useful, thank you :)
In the meantime, I've started a ec2 micro instance 32bit and I'm
trying to compile stuff for dstep :)

On Wednesday, 6 February 2013 at 18:35:30 UTC, David wrote:
> Am 06.02.2013 14:29, schrieb Andrea Fontana:
>> Yes, but I never did a "translation". Any manual/tutorial/help about this?
>> 
>
> Well, you need a basic C knowledge to translate it and there is this
> guide: http://dlang.org/interfaceToC.html
>
> If you need more help you can join #D on irc.freenode.net, helping with
> a realtime chat is easier than over these "forums"

On 2013-02-06 15:45, Andrea Fontana wrote:
> It won't compile on ubuntu 12.10 64bit alternatives?

Use the pre-compiled binary for 32bit.

-- 
/Jacob Carlborg

On Thursday, 7 February 2013 at 07:36:18 UTC, Jacob Carlborg wrote:
> On 2013-02-06 15:45, Andrea Fontana wrote:
>> It won't compile on ubuntu 12.10 64bit alternatives?
>
> Use the pre-compiled binary for 32bit.

On Thursday, 7 February 2013 at 07:36:18 UTC, Jacob Carlborg wrote:
> On 2013-02-06 15:45, Andrea Fontana wrote:
>> It won't compile on ubuntu 12.10 64bit alternatives?
>
> Use the pre-compiled binary for 32bit.

Hey Jacob & Andrea,

I hate to drag this up from so long ago but I am very new to D and have used your tool to convert the latest capi.c from the tesseract-ocr library (https://github.com/tesseract-ocr/tesseract/blob/master/src/api/capi.h)

And I am wondering how I go about simply importing it and using it in my D project.

Here is the converted file, it worked with dstep with no errors:
https://pastebin.com/x1FgWjGj

And I called the output file tesseract_capi.d and put it in the source directory of my project and am trying to import it into one of my apps files named ocr.d as follows:

module ocr;
import std.stdio;
import tesseract_capi;

class ocr{
    TessBaseAPI *api;
    this(){
        this.api = TessBaseAPICreate();
    }
}

And any attempt to build and run returns an: undefined reference to `TessBaseAPICreate'

Should I be linking to the actual library in the dub.json? I cannot seem to find any straightforward tutorial about importing dstep converted files unfortunately.

Any help would be greatly appreciated.
Thank you

On Thursday, 9 May 2019 at 00:30:04 UTC, Fred wrote:
> Should I be linking to the actual library in the dub.json? I cannot seem to find any straightforward tutorial about importing dstep converted files unfortunately.
>
> Any help would be greatly appreciated.
> Thank you

Turns out, yes, all I needed to do was check for the location of the library

tesseract -v
tesseract 4.0.0
 leptonica-1.75.3
  libgif 5.1.4 : libjpeg 8d (libjpeg-turbo 1.5.2) : libpng 1.6.34 : libtiff 4.0.9 : zlib 1.2.11 : libwebp 0.6.1 : libopenjp2 2.3.0

 Found SSE

And add "-ltesseract" to my projects lflags in the dub.json! Sorry for the notification folks +1