My mobile phone camera picture is very grainy. Is there something wrong with the hardware?

There should be no problem with your mobile phone hardware! This is only because:

As the shooting function of mobile phone, the built-in camera function is the same as the low-end (65438+ million-1.3 million pixels) digital camera we usually see. Photoreceptor is the core of digital camera and the most critical technology. At present, there are two core imaging components of digital cameras: one is CCD (Charge Coupled Device), which is widely used; The other is CMOS (complementary metal oxide conductor) device.

Lens is an important part of digital camera, which is divided into CCD and CMOS according to different components.

CCD (Charge Coupled Device) is a high-end technical component used in photography, while CMOS (Complementary Metal Oxide Semiconductor) is used for low-quality products. Its advantages are lower manufacturing cost and lower power consumption than CCD, which is also the reason why many products with USB interface on the market do not need external power supply and are cheap. Because CMOS is cheap, the photosensitive elements of digital cameras used in mobile phones are basically CMOS.

Although there are great differences in technology and the performance gap between CCD and CMOS is not great, CMOS cameras have higher requirements for light sources. On this issue, mobile phones are generally very grainy because they don't have fill lights, especially under low illumination conditions.