I read on the TODO of Gem that the motion detection has to be implemented first but I want to know if somebody tried some 'workarounds' to get something like motion detection. I think about using an infrared camera which will input a black/withe signal. Any suggestions?

for a project i'm doing, i use a different approach with optical trigger fields that send out a bang, if movement has been detected in a certain area of the incoming image ... it's not tested very well (works for my purpose) and i didn't send it to the gem-list, since it's probably possibly to rewrite it as an abstraction... i attached the source files, maybe it can be of use ... in general i think that image analyse functions in gem should be improved ... either in c++ or in abstractions (whatever is faster)

cheers ... tim