Charge-Coupled Device

An electronic light sensor used in cameras and scanners that converts light into electrical signals. CCDs capture images by accumulating electric charge in proportion to the intensity of light hitting each pixel. In accessibility applications, CCD sensors are used in optical Braille recognition devices, document scanners for OCR, and camera-based assistive systems that capture visual information for processing and presentation to users with disabilities. Linear CCD arrays, which capture a single line of pixels at a time, are commonly used in handheld scanning devices.