Web Reference: 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 by using convolution. Jul 23, 2025 · In this article, we look at the underlying ideas of blob detection, how OpenCV is used to build it, how to tweak its parameters, some applications, and finally some perspectives on its relevance across a range of domains. Blobs are bright on dark or dark on bright regions in an image. In this example, blobs are detected using 3 algorithms. The image used in this case is the Hubble eXtreme Deep Field. Each bright dot in the image is a star or a galaxy. This is the most accurate and slowest approach.
YouTube Excerpt: First Principles of Computer Vision is a lecture series presented by Shree Nayar who is faculty in the Computer Science ...
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