please explain the blob function

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please explain the blob function

lombardijoseph
hi,
can anyone explain me how to use the blob.cpp or how to detect blobs by
color from an image? in blob.cpp i gave it a .avi file but after few
seconds that the code ran giving a list of parameters, nothing
happened. should i pick the data from anywhere else? maybe a new file
was created?? i need to detect a red blob and know its coordinates on
the image. can this be done?

thanks a lot