Found it.  Looks like 'gradients' has been added since ocropus 0.2.
--Graham

On Nov 15, 11:52 pm, grahamgrebe <[EMAIL PROTECTED]> wrote:
> Hi
>
> Quick version:
> Web page gives 'gradients' in example, but 'gradients' not found in
> ocroscript.
>
> Long version:
>
> I see fromhttp://ocrocourse.iupr.com/image-processingan example of
> the Canny edge detector.  The sample program includes the command
> 'gradients':
>    read_image_gray(byteimage,arg[1])
>    image:copy(byteimage)
>    gauss2d(image,3.0,3.0)
>    gradients(gradm,gradx,grady,image)
>
> I'm using the ocroscript that comes with ocropus-0.2:
>   [EMAIL PROTECTED]:~/ocropus-0.2/ocroscript$ ocroscript -v
>    OCRoscript (interactive)
>
> But gradients does not seem to be defined:
> [EMAIL PROTECTED]:~/Desktop$ ocroscript canny.lua
> ocroscript: canny.lua:11: attempt to call global 'gradients' (a nil
> value)
> stack traceback:
>         canny.lua:11: in main chunk
>         [C]: ?
> [EMAIL PROTECTED]:~/Desktop$
>
> I looked for gradients in the .pkg files, but didn't find it.  Looked
> around in the subversion server, particularly image.pkg, and didn't
> see anything there either.
>
> Is 'gradients' something that existed in a previous release?  Is there
> an equivalent function in ocropus-0.2?
>
> Thanks,
> --Graham
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