This week’s edition — edge detection in images. More specifically we’ll be taking a closer look at the Sobel Edge Detection algorithm. Let’s start from the beginning. Grayscale Images The Sobel algorithm works by measuring the varying pixel intensity in an image. Naturally, this is easiest to accomplish

Let’s take a closer look at the technical aspects of this technology (Global Positioning Systems), starting with the satellites and working our way down to the receivers on the ground. ![Image for post](https://i2.wp.com/miro.medium.com/max/468/1*rBAMjm_JHGi1SBqs8vgu5g.png?resize=586%2C350&

If you’re like me, you’ve wondered how sites like Facebook, Reddit, and Instagram are able to tell you whether a username has been taken so quickly. It seemed like these services were able to search through hundreds of millions of user records to verify the uniqueness of a

Cybersecurity has always been a weak point for me and after setting up Authy for the n-th time, it seemed as good a time as any to take a deep dive and figure out exactly how these time-based one-time password algorithms worked. Basic Overview At the highest level, the passcodes