Scanning is the process of digitizing paper documents or physical objects through a scanner or other device.
1. During the scanning process, the device will convert the image or text on the object into a digital signal to facilitate computer processing and storage.
2. Scanning technology is widely used: document digitization, scanning can convert paper documents into electronic documents for easy storage and transmission; image processing, scanning can convert physical objects or photos into digital images. Convenient for subsequent editing and processing; security detection, scanning can be used for security detection, such as X-ray scanners in airport security; medical diagnosis, CT scanners in medical equipment can digitally scan the human body to facilitate diagnosis by doctors .
3. The development of scanning technology has gone through many stages: optical scanning, the earliest scanning technology is optical scanning, which uses optical sensors to convert images on objects into electrical signals; CCD scanning, and later CCD scanning appeared Technology, using CCD sensors for scanning, improves the resolution and speed of scanning; CMOS scanning, most scanners use CMOS sensors for scanning, with higher resolution and lower power consumption; Hybrid scanning, used by some high-end scanners Hybrid scanning technology uses both CCD and CMOS sensors for scanning to take into account both resolution and speed.