How to save/load the whole internal states (not the parameters) of the BackgroundSubtractors, OpenCVSharp?

C++
1

I have successfully used OpenCVSharp, specifically the BackgroundSubtractorGMG, BackgroundSubtractorKNN, and BackgroundSubtractorMOG2, to perform background subtraction on images. However, when attempting to save the trained model, I have found that I can only save and load the parameters used to configure it!

Do you have any suggestions on how I can save the entire model with its learned state for future use? If there isn’t a direct way to achieve this, is it feasible to make modifications to the library to enable such functionality?

2

you cant save the state (or learned model)
(it’s not a csharp problem)

what is your actual use-case, which would require this ?

it’s meant to be used on continuous video streams to find moving objects (and assumes you have a few hundred frames to spare on startup to ‘train’ it.)

can it be, you’re looking for some more general object segmentation on single images ?

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cv::algorithm has read(), write(), save() instance methods and load(), read() static methods

BackgroundSubtractor, being a subclass of cv::algorithm, should mean that further subclasses implement those… hopefully with sensible semantics.

crosspost:

4

Thanks for your response, Berak,

I aim to kick off the inference right from the get-go, skipping the training process every time the system starts. Consequently, I aim to store the most recent model state and start using it promptly upon startup.

As far as I am concerned, there is no direct way to do that. I want to know where can I modify the implementation or, maybe, add a new method for that functionality!

5

it’s not about you, there IS no way to do that builtin.

you’d have to dig into the resp. cpp source here

again, there are read/write methods, so it might even go without modifying interfaces

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