Blob ID matching over multiple frames in C++ (image analysis)

Question

Dear reader,

I'm working on a blob matching and tracking library in C++. Currently I'm using openCV to detect blobs and try to match blobs in a new frame by checking the position, velocity and size of the blob. This works quite okay and I'm receiving a high blob match rate (95% or higher).

Sometimes blobs fall out of the image or new blobs appear. Now I need to give matched blobs the same ID as they had before. I'm wondering if there are typical or commonly used techniques for doing this. Or even some keywords I can use to google on.

Thanks

Answer 1

http://en.wikipedia.org/wiki/Blob_extraction

I assume you have your blobs in a binary image, simply floodfill each blob with a different color/id, and register overlapping blobs between frames with the same id.