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Open Source Computer Vision Library
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80 lines
2.0 KiB
80 lines
2.0 KiB
12 years ago
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Background Subtraction
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======================
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12 years ago
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.. highlight:: cpp
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gpu::VIBE_GPU
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-------------
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.. ocv:class:: gpu::VIBE_GPU
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Class used for background/foreground segmentation. ::
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class VIBE_GPU
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{
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public:
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explicit VIBE_GPU(unsigned long rngSeed = 1234567);
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void initialize(const GpuMat& firstFrame, Stream& stream = Stream::Null());
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void operator()(const GpuMat& frame, GpuMat& fgmask, Stream& stream = Stream::Null());
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void release();
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...
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};
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The class discriminates between foreground and background pixels by building and maintaining a model of the background. Any pixel which does not fit this model is then deemed to be foreground. The class implements algorithm described in [VIBE2011]_.
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gpu::VIBE_GPU::VIBE_GPU
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-----------------------
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The constructor.
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.. ocv:function:: gpu::VIBE_GPU::VIBE_GPU(unsigned long rngSeed = 1234567)
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:param rngSeed: Value used to initiate a random sequence.
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Default constructor sets all parameters to default values.
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gpu::VIBE_GPU::initialize
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-------------------------
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Initialize background model and allocates all inner buffers.
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.. ocv:function:: void gpu::VIBE_GPU::initialize(const GpuMat& firstFrame, Stream& stream = Stream::Null())
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:param firstFrame: First frame from video sequence.
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:param stream: Stream for the asynchronous version.
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gpu::VIBE_GPU::operator()
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-------------------------
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Updates the background model and returns the foreground mask
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.. ocv:function:: void gpu::VIBE_GPU::operator()(const GpuMat& frame, GpuMat& fgmask, Stream& stream = Stream::Null())
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:param frame: Next video frame.
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:param fgmask: The output foreground mask as an 8-bit binary image.
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:param stream: Stream for the asynchronous version.
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gpu::VIBE_GPU::release
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----------------------
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Releases all inner buffer's memory.
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.. ocv:function:: void gpu::VIBE_GPU::release()
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.. [VIBE2011] O. Barnich and M. Van D Roogenbroeck. *ViBe: A universal background subtraction algorithm for video sequences*. IEEE Transactions on Image Processing, 20(6) :1709-1724, June 2011
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