@getinbalcony I plan on doing some image processing test and have some OpenCV scripts that I will be trying out, however a few caveats.
The current Ubuntu version provided is based on 11.10, which is... old (release date Oct 2011) and the OpenCV packaged with that is *ancient* - 2.1 from June 2010. Looks like the OpenCL module wasn't added to OpenCV until ... 2.3.1? You're going to need to either build OpenCV from source or see if we can get a better version of Ubuntu (raring or saucy would do the trick).
Another thing to note doing a quick search is that the Vivante GPU supports "OpenCL 1.1 Embedded Profile" From this thread
EP does not include support for 3D images, 64b integers, and double precision floating point. Requirements on the samplers are reduced (in addition to the number reduced from 16 to 8) and the math precision is lowered below the IEEE 754 specification for some functions (e.g. atan). Lastly, the minimum image size is reduced to 2048 (from 8192) and the local memory is reduced to 1KB (from 16KB).
It's quite possible that the OpenCV OCL module may not work particularly well w/ the Vivante GPU's EP implementation.
Anyway, sounds like good fun. Report back on what you discover!