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Is there an advantage to building opencv yourself?

asked 2017-10-13 04:08:25 -0500

SpacePirate gravatar image

Hi,

Other than being able to get correction before the release. Does code compiled on your computer is faster than code compiled elsewhere?

Thanks.

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answered 2017-10-13 05:49:01 -0500

mshabunin gravatar image

__Advantages:__

  • you can build OpenCV better optimized for this machine (cmake variables CPU_BASELINE and CPU_DISPATCH) - read more here, by default we use SSSE3 as baseline
  • you can build only limited subset of a library (just opencv_core and opencv_imgproc for example), can compose it into a single opencv_world.dll binary, make it static or dynamic
  • you can choose different options for video backends, parallel_for backend, windows backends, OpenCL, OpenGL support and many others
  • build modules which are not provided in default distributions: opencv_viz, all CUDA modules, all opencv_contrib modules
  • replace subset of functionality with your own functions via HAL (read more here)
  • you can built accuracy and performance tests and check how good does your platform perform basic operations before experimenting with complex algorithms

__Disadvantages:__

  • you need some free time for this
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thank you :)

SpacePirate gravatar imageSpacePirate ( 2017-10-14 02:08:33 -0500 )edit
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Asked: 2017-10-13 04:08:25 -0500

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Last updated: Oct 13 '17