OpenCV in WorldViz

[JimC]

You might have a look at ctypes_opencv. It's not intended for Python 2.4, but as it's pure python code it might be made to work.

Sorry, that was perhaps not clear. It's still a wrapper around the C dlls, but ctypes allows you to write the wrapper directly in Python rather than in some C-like (SWIG) or C++-like (SIP) dialect...If the problem is in the original pyopencv wrapper code, then this might provide a workaround...

[JimC]

OK, I got interested and got it to work (at least, I got capture-cam and a couple others to run). Download. The src/ctypes_opencv folder goes in Vizard's site-packages directory, there's also a folder of modified demos (I assume the syntax is a bit different). Let me know if the PIL conversion works...

[nige777]

Wow, you really are the man . I'm itching to try this out - will report back as soon as I have.

[JimC]

I wrote to the author of ctypes-opencv and ended up applying the fixes to the bleeding-edge version and mailing that to him. Interestingly, it looked like there might be some code added to the bleeding-edge version relevant to exactly the problem you've been writing about, so you might want to look at that. It's here.

[nige777]

Thank you so much for all of your time on this.

I'm tied up playing with kalman filters for the weekend so haven't had time for a proper test - however i have quickly run a couple of the demos which while they seem to work there is a complaint:

no functools support

a module which I know made an appearance in 2.5 - so I'm presuming that this rules out this fix, or am I wrong on that?

[JimC]

That's just a warning. AFAIK, all functools is used for is to fix the docstring of a single decorated function, so just ignore it.

[nige777]

Thats great news, thanks for the reply.
As my background is in CAD&3d modelling not in computer science there is alot of incidental knowledge that I miss -