Pointer to Image

[Thomas Heller]

cjankowski at hbr-inc.com (Chris Jankowski) writes:

> Here is what I have now.
>
> from ctypes import *
> def myOutputHandler(infotype, param):
>     outputFile.write("outhandler")
>     if infotype == "OT_TEXT":
>         print param
> ##        return param
> ##    elif infotype == "OT_ENDL":
> ##        return "\n"
> ##    elif infotype == "OT_ENDZ":
> ##        return "\n\n"
>     return
> #***************************************************************
> #* main process                                                *
> #* myList - requests                                           *
> #* inList - data file                                          *
> #***************************************************************
> if __name__ == '__main__':
>     outputFile=open('c:\\newOCR.txt', 'w')
>     myOcr = cdll.LoadLibrary('C:\\SimpleOCR\\ocrdll.dll')
>     loadImg = myOcr.LoadMultipleImg
>     x = loadImg("c:\\chris.tif")
>     print x
>     setLanguage = myOcr.SetLanguage
>     setLanguage('ENGLISH',".")
>
>     setOutputMode = myOcr.SetOutputMode
>     setOutputMode("OM_TEXT")
>
>     setOutputHandler = myOcr.OCRSetOutputHandler
>     z = id(myOutputHandler)
>     errorx = setOutputHandler(z)
>         
>     getImage = myOcr.GetImage
>     img = getImage(x,0)
>
>     getNBImages = myOcr.GetNbImages
>     numImg = getNBImages(x)
>
>     processOCR = myOcr.OCR 
>     myTest = processOCR(img)  ## it will run without this line.
>     
>     freeMultipleImage = myOcr.FreeMultipleImg
>     freeMultipleImage(x)
>
>     outputFile.close()
>
> This will not run it abends when I try to call the .OCR function.  I
> am thinking that it cannot call the procedure to write the file.  Any
> ideas?

At least one problem that I see is that you are passing
id(myOutputHandler) to setOutputHandler call.  Assuming that
setOutputHandler expects a C callback function, this will not work.

Ok - send me (in private email) a pointer to where I can download the
ocrdll.dll including C header files, plus your 'chris.tif' image, and I
will take a look at it.

Thomas