What is the difference between the one third and one quarter of the surveillance camera? What is the different CCD
The surveillance camera is a semiconductor imaging device, which has the advantages of high sensitivity, strong anti-glare, small distortion, small volume, long life and shock resistance. Surveillance cameras security system, the image of the generated current is mainly from the CCD camera, also can remove the storage charge to change voltage, resistance to vibration and impact of the characteristics and is widely used.
CCD: Charge - coupled Device, Chinese full name: Charge coupled Device. It can be called CCD image sensor, also called image controller. A CCD is a semiconductor device that converts optical images into digital signals. Tiny photosensitive substances embedded in the CCD are called pixels. The more pixels contained in a CCD, the higher the resolution. A CCD is like a film, but it converts light signals into electrical signals. There are many neat photodiodes on the CCD, capable of sensing light and converting optical signals into electrical signals, which are converted into digital image signals by external sampling amplification and analog conversion circuits.
1/4 and 1/3 are the size of the camera's photosensitive chip. The camera image sensor (CCD or CMOS) has a 1/3 inch or 1/4 inch area. With the same manufacturing process and standard, the larger the image sensor (CCD or CMOS), the better the image quality (resolution) will be.
