Algorithms
27 bites tagged Algorithms — interview questions with model answers, and 60-second explainers.
Canny Edge Detector: Finding True Edges
The Canny detector finds true edges by identifying sharp, connected intensity changes. It's used in object detection and feature extraction where clean edge maps are vital.
The Sobel Operator: Fast, Cheap Edge Detection
The Sobel operator finds image edges by measuring how fast pixel brightness changes horizontally and vertically. It's a fast, cheap first pass for edge detection in computer vision. The footgun is treating it as precise; it's a crude approximation.
Image Scaling: Resizing Pixels Without Ruining Them
Image scaling isn't just stretching a picture; it's inventing or discarding pixel data. It's used everywhere from displaying thumbnails to making 1080p video fit a 4K screen.
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