All and all eblearn + visiongrader seem like great tools, with a nice
and well thought API.
I will definitely look more in detail about their internals (I already
had played around with eblearn a few months ago) and use/re-use as
much as possible the existing code base.

Thanks for your interest Rodrigo. If you reuse existing parts, I guess the best�for what you want to do would be to use the tensor library libidx and its GUI as a basis for image/matrix manipulations (not tied to any learning scheme) and visiongrader for performance evaluation.

Pierre