Blob_Tracking_Modules.zip_blob_opencv_tracking_zip

Blob Tracking Modules

Table of contents

Blob Tracking Modules ...................................................................................................................1

Table of contents .........................................................................................................................1

General Description.....................................................................................................................1

Data structures description ..........................................................................................................2

CvBlob.....................................................................................................................................2

CvBlobList...............................................................................................................................2

Modules descriptions...................................................................................................................2

CvBlobTrackPostProc .............................................................................................................6

CvBlobTrackPostProcList ...................................................................................................6

CvBlobTrackPostProcOne...................................................................................................7

General Description

The blob tracking system includes 5 modules as depicted on diagram.

This pipeline is called “Blob Tracking Auto” module and implemented as individual module in

BlobTrackingAuto.cpp and BlobTrackingAuto.h files.

“FG/BG Detection” module performs foreground/background segmentation for each pixel.

“Blob Entering Detection” module uses the result (FG/BG mask) of “FG/BG Detection” module

to detect new blob object entered to a scene on each frame.

“Blob Tracking” module initialized by “Blob Entering Detection” results and tracks each new

entered blob.

“Trajectory Generation” module performs a saving function. It collects all blobs positions and

It is a simple structure describing a blob position, size and ID.

This is a class to collect set of blobs. This set can be trajectories or (for example) list of blob on

current frame. So this list is the indexed array and each element of this array can be addressed by

Now this class is implemented using CvSeq from OpenCV. Initially this class was implemented

to simplify blob list creation and manipulation.

This is virtual class, describing interface of “FG/BG Detection” module.

The interface is defined in videomining\Surveillance\src\BG-FG-

Estimation\PM\BG_FG_Estimation.h file. If someone wants to create own module, he must

create a class inherited from CvFGDetector and implement all virtual methods declared in

CvFGDetector.

Input Data:

Output Data:

This module classify pixels on current frame to FG or BG pixels. As result the FG mask is

returned by GetMask method. All methods must be redefined in child class. Also some creation

function must be written.

This is virtual class, describing interface of “Blob Entering Detection” module.

The interface is defined in EnteringBlobDetection.h file. If someone wants to create own

module, he must create a class inherited from CvBlobDetector and implement all virtual methods

declared in CvBlobDetector.

Input Data:

FG/BG mask of current frame;

List of existed Blobs.

This module detects new blob using FG mask. As result the newly detected blobs saved to