Haar-like features

Haar-like features are simple rectangular patterns used in computer vision, particularly for object detection, such as identifying faces in images. They work by comparing the intensity of light and dark regions within these rectangles. By analyzing various combinations of these regions, the system can quickly determine whether a specific feature, like a face, is present in a given image. This approach is efficient because it reduces complex image data into meaningful calculations, enabling faster and more accurate detection, which is crucial in real-time applications like security cameras and smartphone facial recognition.