What is Image Segmentation?
TL;DR: Image segmentation is an AI technique that divides an image into meaningful regions. In background removal, the AI identifies which pixels belong to the foreground subject and which belong to the background, creating a pixel-perfect separation.
Modern segmentation models like BiRefNet use deep neural networks trained on millions of images. They can handle complex edges (hair, fur, transparent objects), multiple subjects, and challenging backgrounds with remarkable accuracy.