Simple yet effective method – Otsu thresholding (envisioned in 1979) makes the conversion from grayscale to a binary image. It is based on the observation of the grayscale histogram and used only the zeroth- and first-order cumulative moment. Even though this approach was proposed for over 40 years, it is…

Do you remember things that happened in your childhood? As for me, when I am looking at some old photos I have taken, all things come into my brain. Maybe, mysterious powers that can rise the deeply buried memory are hidden in “old photos”. …

There may contain some imperfections in images under some circumstances, for example, the fingerprint is scanned and then distorted by noises, the image is not intact for not being preserved well. Morphological processing is the way to remove/reduce these imperfections, and it not only can be applied to binary images…

In image processing and analysis, we sometimes need a method to separate two related data, for example, background and foreground, land and river. In this article, I’ll introduce a data-driven way that can adaptively find the optimal threshold to distinguish two-class data — Otsu thresholding. …

Canny Edge Detection +Short introduction Canny edge detection is the edge detection technique in image processing. It is notable that with the non-maximal suppression and double threshold, this method performs well in both noise processing and edge positioning. +More details Canny algorithm can be divided into the steps below (from step 0 to step…