With the help of ActivBlobFinder, you can extract so-called blobs from images. Generally speaking, a blob is a region in the image whose pixels differ in some way from the surrounding part of the image. A blob can have any shape and may even contain holes. Extracted blobs can be called the "foreground" of an image, the rest the "background".

ActivBlobFinder offers multiple methods for extracting blobs, ranging from very fast and simple ones to methods that extract blobs even from a difficult background. Moreover, it allows to process extracted blobs further, e.g., to fill holes.

Blob analysis can be used to locate parts in the image or to check their shape (see an example application).