What does 3mp on the camera lens mean?

3MP on the camera lens means 3 million pixels.

3MP is the abbreviation of 3millionaire pixel, which can shoot video with 18P resolution.

the pixel of a camera and the nominal pixel of a common camera have different meanings, and the difference between them is also quite large.

cameras are generally nominally the largest available pixel, while cameras are nominally the largest static pixel. The available pixels of the camera are, for example, 12 million pixels, and the available shooting resolution is 4X3. The camera's 3 million pixels means that it can take about 248X1536 photos. In fact, there is a more important parameter of the camera, that is, dynamic pixels, which also determines an important parameter of the camera performance.

the dynamic pixels of the camera determine the resolution of shooting video, which is generally adapted to the resolution of the TV.

the NTSC standard of TV is 72x48 with a refresh rate of 6Hz, PAL is 72x576 with a refresh rate of 5Hz. China's TV broadcasting adopts PAL system. 18P is two million pixels with a resolution of 192*18? 72P is one million pixels with a resolution of 96*72/128*72? D1: Resolution 74*576 (equivalent to 4CIF)? FULL D1 resolution 74x576,72x576,? Half D1 resolution 72x288? 4CIF: Resolution 74*576? 2CIF: Resolution 74*288(HALF D1)? CIF: Resolution 352*288? QCIF: That is, quarter resolution of 176*144? VGA: The resolution is 64*48? QVGA is a quarter with a resolution of 32*24.

Generally, the dynamic pixels of a camera are lower than those of a camera, and it is not impossible to make them higher. The main considerations are as follows:

The lower the pixels per inch of a photosensitive element with the same area, the larger the area of a single pixel, the more light it receives, and the higher the tolerance, so that a relatively pure picture can be obtained at a low ISO.

it takes a long time for a camera to take pictures. The higher the resolution, the higher the performance of the processor, and the greater the heat generation. It is difficult to solve the problem of heat dissipation after working for a long time. Many cameras can also shoot 18P videos, but it is usually set for a long time to prevent the processor core from overheating.

most of the cameras are played by televisions or monitors. At present, the resolution of this part of the equipment is mainly around 18P, and the dynamic pixels used to achieve 18P video shooting are less than 3 million. At this time, the demand for pixels is not urgent. In order to achieve a smoother effect, it is more important to improve the refresh rate of the camera. However, rashly increasing the pixels reduces the area of a single pixel, and increasing the sensitivity under the condition of increasing the refresh rate will have a certain impact on the image quality.