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set mask in Python ? #189

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peijason opened this issue Sep 15, 2020 · 1 comment
Open

set mask in Python ? #189

peijason opened this issue Sep 15, 2020 · 1 comment
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@andrewssobral
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@peijason
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Tested both c++ and python.

  1. In c++:
    bgs->process(img_input, img_mask, img_bkgmodel);
    we can input a img_mask.

  2. In python:
    from demo.py and demo2.py.
    img_output = algorithm.apply(frame)

it looks there is nowhere for me to input an mask image?

Any suggestions?
@andrewssobral andrewssobral self-assigned this Jul 24, 2022
@andrewssobral
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Hi @peijason , sorry for my delayed feedback to you.

In c++: bgs->process(img_input, img_mask, img_bkgmodel);
img_mask and img_bkgmodel are references to be filled by the process method.

In python the behavior is different.

img_output = algorithm.apply(frame)

img_output is equivalent to img_mask (but it returns by value instead of reference)
and img_bkgmodel can be given by:

img_bkgmodel = algorithm.getBackgroundModel()

Hope this helps you.

For info, I just released a new version of the BGSLibrary, now v3.1.0.
I tested it on Windows, Mac and Linux, both compiling the C++ library on OpenCV 3.4.7, 3.4.16 and 4.6.0.
I also tested its respective Python wrapper and GT user interface.
Thanks,
Andrews

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