cv::bgsubcnt Namespace Reference

The BackgroundSubtractorCNT related code is in here.

Classes
class	BackgroundSubtractorCNT
	Background subtraction based on counting. More...

Functions
BGSUBCNT_EXPORTS_W Ptr< BackgroundSubtractorCNT >	createBackgroundSubtractorCNT (int minPixelStability=15, bool useHistory=true, int maxPixelStability=15 *60, bool isParallel=true)
	Create background subtraction based on counting. More...

Function Documentation

BGSUBCNT_EXPORTS_W Ptr<BackgroundSubtractorCNT> cv::bgsubcnt::createBackgroundSubtractorCNT	(	int	minPixelStability = 15,
		bool	useHistory = true,
		int	maxPixelStability = 15 *60,
		bool	isParallel = true
	)

Parameters

minPixelStability	number of frames with same pixel color to consider stable
useHistory	determines if we're giving a pixel credit for being stable for a long time
maxPixelStability	maximum allowed credit for a pixel in history
isParallel	determines if we're parallelizing the algorithm

Returns

a smart pointer to a BackgroundSubtractorCNT

Note

The default values assume 15 FPS, in which a pixel which keeps it's value for ~ 1 second is a stable background.

For history, a stable pixel will keep counting frames up to maxPixelStability. Changes will try to decrement the count, but as long as it is above minPixelStability, is will remain stable. for example, if FPS * is 15, then maxPixelStability of 15*60 means that a changes of ~ 60 seconds will make this pixel non-stable background.

Effect of learningRate in apply(..., learningRate) -

• If learningRate == -1, then the algorithm is as stated above.
• If learningRate == 0, it is as if you used 'useHistory = false'.
• If 0 < learningRate < 1, then maxPixelStability = "initial maxPixelStability" * learningRate

Examples:

main.cpp.