Wiki gives this definition of blob detection
In computer vision, blob detection methods are aimed at detecting regions in a digital image that differ in properties, such as brightness or color, compared to surrounding regions. Informally, a blob is a region of an image in which some properties are constant or approximately constant; all the points in a blob can be considered in some sense to be similar to each other. The most common method for blob detection is convolution.
based on which, is there 8 separate color blobs in this figure?
Is it possible to use clustering algorithm to color blob detection problem?