What does the ev of the mobile phone camera mean?

1, EV stands for exposure compensation.

Exposure is usually represented by the combination of shutter speed (t) and aperture value (f). For simplicity, it is once expressed by light value (LV) and uniformly expressed by EV. EV is the abbreviation of English Exposure Values, and it is a quantity that reflects the degree of exposure.

Initially defined as: the sensitivity is ISO 100, the aperture coefficient is F 1, and when the exposure time is 1 s, the exposure is defined as 0, the exposure is reduced by one step (the shutter time is halved or the aperture is reduced by one step), and the EV value is increased by 1.

2.ISO is the sensitivity of CCD.

Sensitivity, also known as ISO value, is a measure of the sensitivity of negative film to light, which is determined by the measurement of sensitivity and several values, and has recently been standardized by the International Organization for Standardization. For the negative with low sensitivity, it takes a long exposure time to achieve the same imaging effect as the negative with high sensitivity, so it is usually called slow negative.

Highly sensitive negatives are therefore called fast negatives. Whether it is digital or negative photography, in order to reduce the exposure time, the relative use of higher sensitivity usually leads to the decline of image quality (due to thicker negative particles or higher image noise or other factors).

3.s refers to the shutter, that is, the speed.

Shutter is the mechanism used by camera to control the effective exposure time of photosensitive film. It is an important part of the camera, and its structure, form and function are important factors to measure the grade of the camera. Generally speaking, the larger the shutter time range, the better. Low seconds is suitable for shooting moving objects, so a camera emphasizes that the shutter can reach116000 seconds at the earliest, which can easily capture fast moving targets.

However, when shooting traffic at night, the shutter time will be lengthened, and the silky water flow effect in ordinary photos can only be photographed with a slow shutter.

4.WB refers to white balance.

White balance literally means white balance. White balance is an index to describe the white accuracy of the mixed red, green and blue primary colors in the display. White balance is a very important concept in the field of TV camera shooting, through which a series of problems such as color restoration and tone processing can be solved. White balance is produced with the true color reproduction of electronic images, and it was applied earlier in professional photography.

Extended information We all know that the phase background of professional SLR cameras is relatively large, and the photos taken can be magnified to dozens or even hundreds of times, while the phase background of mobile phone cameras is relatively small, and the photos taken by magnifying several times are easily blurred, especially when the light is bad, when shooting at night or backlighting, the problems of underexposure or overexposure, heavy smear and loss of details are even more troublesome.

1. Reduce ISO and use longer shutter time to get more light.

2. A camera with a large pixel photosensitive element (large phase bottom) can get more light.

In fact, these two methods are to make the camera get more light and shoot more details under the same light. However, it is difficult to maintain stability when shooting with a slow shutter, so a mobile phone camera with a larger pixel sensor is a better choice.

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