Hi, I have a doubt about the SIFT algorithm.
In the OpenCV documentation it says:
For this, scale-space filtering is used. In it, Laplacian of Gaussian is found for the image with various σ values. LoG acts as a blob detector which detects blobs in various sizes due to change in σ.
I don't quite understand what means 'detects blobs', can someone explain to me?
Thanks in advance