CvTrack和CvBlob有什么区别？

Question

我们在程序中使用结构cvtrack和cvblob进行斑点检测，但由于这两种类型的结构成员相同，因此我无法找到这两种结构之间的差异。

Answer 1

You can use cvBlob to detect and draw figures defined by contours (blobs). then you can track them, from one frame to another. For this you use cvTracks , which gives you a label and a lifetime. you can give also a lifetime limit (if the blob is not detected in one frame, it is saved for a couple of frames in order to detect it again if it appears again, if the lifetime pass, it is removed and cosidered a new blob if it is detected again). Then in some implementations you have a lifetime limit for being active (it does the opposite, after it is active a couple of frames, it is considered a new blob). You can see an example here .

Answer 2

There are two different blobs libraries with similar names: CvBlobsLib and cvblob

In cvblob (version 0.10.4), the CvTrack struct is similar but not identical to CvBLob . CvTrack has these members that are not present in CvBlob :

unsigned int    lifetime
// Indicates how much frames the object has been in scene.
unsigned int    active
// Indicates number of frames that has been active from last inactive period.
unsigned int    inactive
//Indicates number of frames that has been missing.