📸 Edge Detection in Images: Sobel vs Canny using OpenCV (Python)
Edge Detection: Sobel vs Canny ✨ Introduction Edge detection is a fundamental technique in computer vision used to identify boundaries of objects in images. Whether it's medical imaging, license plate recognition, or self-driving cars, edge detection helps machines interpret the structure of visual data. In this blog, we’ll: Understand and implement Sobel and Canny edge detection techniques. Walk through a numerical example of convolution and thresholding using Sobel. Write Python code to visualize both methods side by side. 📘 Theory 🔹 What is Edge Detection? Edge detection locates points in a digital image where brightness changes sharply. These changes often indicate boundaries of objects. 🔹 Sobel Operator The Sobel operator uses two 3×3 convolution kernels to compute gradients in: Horizontal direction (Gx) Vertical direction (Gy) From these, we compute the gradient magnitude at each pixel, indicating edge strength. Sobel Kernels...