Sets number of threads used by OpenCV for parallel regions

cv.Utils.setNumThreads(n)

Input

• n number of threads.

OpenCV will try to set the number of threads for the next parallel region.

OpenCV will try to run its functions with specified threads number, but some behaviour differs from framework:

• TBB User-defined parallel constructions will run with the same threads number, if another is not specified. If later on user creates their own scheduler, OpenCV will use it.
• OpenMP No special defined behaviour.
• Concurrency If threads == 1, OpenCV will disable threading optimizations and run its functions sequentially.
• GCD Supports only values <= 0.
• C= No special defined behaviour.