I recently installed OpenCV via cmake with the option WITH_TBB=ON on a raspberry pi 3.
The code I wanted to accalerate is basically a circle detection with HoughCircles.
Unfortunately the CPU usage is the same as before having TBB enabled, that is somewhere below 30%.
Why is it that way? I supposed HoughCircles is highly parallelizable, according to this http://www.ijcsi.org/papers/IJCSI-9-6-3-481-486.pdf.
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