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akorentlab / tesseract-ocr

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Delphi wrapper for tessdll.dll ?? #88

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
I'm trying to use tessdll.dll from delphi but I can't get success.

I follow all steps from testdll.exe project but nothing... Someone use 
tessdll.dll from delphi? 

Best regards from Spain.

Original issue reported on code.google.com by dad...@gmail.com on 26 Dec 2007 at 5:53

GoogleCodeExporter commented 9 years ago 

you need to change the __cdecl modifier in the tessdll.h to __stdcall then 
ricompile 
after that use  DEpendencyWalker.exe to get the exact names of exported 
function..
for example _TessDllRelease@0 for TessDllRelease...

on Delphi side write  a unit like that, (only TessDllRelease in the  example 
but you
can add the others)

//delphi unit 
unit TessDll;

interface
uses 
    Windows;
type
  TTessDllRelease   = procedure ;stdcall;
var
  hlib:HMODULE;
  TessDllRelease:TTessDllRelease;

implementation

initialization
    hlib:=LoadLibrary('Tessdll.dll');   
    @TessDllRelease:=GetProcAddress(hlib,'_TessDllRelease@0');

end.
//end delphi unit 
now you can call it by something like

procedure TFormOCR.Button4Click(Sender: TObject);
begin
    TessDllRelease;
end;

btw : i have not used all the functions in tessdll.dll but i have defined my 
own one
that's why i dont report it in the code above 
hope this help

Original comment by lr1...@gmail.com on 12 Jan 2008 at 8:21

GoogleCodeExporter commented 9 years ago 
Hi

I have no C compiler. If you rebuilt the dll successly please send me with mail 
or 
place anywhere and give link please.

mrmcop@gmail.com

Sincerely yours..

Original comment by mrm...@gmail.com on 15 Jan 2009 at 9:59

GoogleCodeExporter commented 9 years ago

Original comment by theraysm...@gmail.com on 21 May 2010 at 8:32

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
My application in Delphi is aborting when execute "GetAllWords".

Original comment by rogerios...@gmail.com on 5 Jun 2011 at 12:22

Attachments:

GoogleCodeExporter commented 9 years ago 
rogerios...
finally, you resolved the problem (of aborting when "GetAllWords" is called)?

Original comment by alles...@gmail.com on 7 Jul 2011 at 7:20

GoogleCodeExporter commented 9 years ago 
I have the same trouble mrm had, I don't have C compiler, someone can recompile 
and send Delphi version for me please ?

Original comment by marcosde...@gmail.com on 13 Nov 2011 at 3:25

GoogleCodeExporter commented 9 years ago 
Has anyone been successful creating a Delphi 5 or Delphi 2010 project for 
Tesseract 3.01 ?

I tried to compile above project in Delphi 5 Enterprise and fatal error

[Fatal Error] uPrincipal.pas(6): File not found: 'Variants.dcu'

Original comment by nine.ele...@gmail.com on 21 Jun 2012 at 8:56

GoogleCodeExporter commented 9 years ago 
where to get dll for delphi? can someone help me?

edmilsongrilo@hotmail.com

Original comment by edmilson...@gmail.com on 7 Nov 2012 at 7:40

GoogleCodeExporter commented 9 years ago 
have a look at project ocrivist - it looks like they have wrapper around 
(older?) version of tesseract. Maybe encourage/help them to upgrade to the 
recent version...

http://code.google.com/p/ocrivist/source/browse/#svn%2Ftessintf

Original comment by zde...@gmail.com on 8 Nov 2012 at 7:34

GoogleCodeExporter commented 9 years ago 
Reference to this issue was posted in FAQ

Original comment by zde...@gmail.com on 2 Jan 2013 at 12:44

GoogleCodeExporter commented 9 years ago 
ocrivist is not working on Win7 nor in Win8 and this project seems to be not 
under active development. Maybe there are some other hints?

Original comment by d.schulz...@googlemail.com on 30 Apr 2015 at 7:49