A CMOS sensor (Complementary Metal-Oxide-Semiconductor) is a type of image sensor used in digital cameras and smartphones. It converts light into electrical signals, allowing for the capture of images. CMOS sensors are known for their low power consumption and faster processing speeds compared to other types of sensors, such as CCD (Charge-Coupled Device) sensors. These sensors are widely used in various applications, including photography, video recording, and surveillance. They are integral to devices like digital cameras, smartphones, and webcams, enabling high-quality image capture in a compact form. CMOS technology continues to evolve, improving image quality and performance.