Photographing method and device for mobile terminal

Abstract

The invention relates to the field of electronics, and discloses a picture and video photographing method and device for a mobile terminal. According to the invention, the method comprises the following steps: controlling a flash lamp to be turned on at least one time at a stage of frame and previewing, wherein the power of the flash lamp during turning-on is less than or equal to the maximum power; obtaining one or more real-time pictures obtained by the real-time framing of a camera when the flash lamp is turned on, and obtaining trial picture brightness through image analysis; determining a final photographing parameter according to the trial picture brightness and an corresponding to-be-adjusted parameter value; and controlling the flash lamp and the camera for formal photographing at a formal photographing stage through a final photographing parameter. The method can determine the satisfactory flashing lamp power, light-emitting time, camera gain, diaphragm and shutter time in an automatic or manual mode during formal photographing of pictures and videos, and prevents improper photographing parameters from causing insufficient exposure or excessive exposure of obtained pictures or videos.

Description

technical field [0001] The present invention relates to the field of electronics, in particular to the photographing technology of a mobile terminal. Background technique [0002] The popularization of portable mobile terminals such as smart phones makes more and more people use them to take pictures and videos. However, at present, when most mobile terminals take pictures and record videos, the flashlight has only two options: on and off, and often encounter the problem that the photo or video is overexposed without the flashlight being turned on and the photo or video is too dark. At the same time, the lighting brightness of the flash decreases with the increase of the distance in a square relationship. For example, the lighting brightness of the flash for an object 2 meters away is a quarter of that for an object 1 meter away, so it is difficult to simply determine the required screen brightness. Appropriate flash power often leads to the problem that the screen brightne...

AI Technical Summary

Problems solved by technology

However, at present, when most mobile terminals take pictures and record videos, the flashlight only has two options of on and off, and often encounter the problem that the photo or video is overexposed after the flashlight is turned on, and the photo or video is too dark when the flashlight is turned on.

At the same time, the lighting brightness of the flash decreases with the increase of the distance in a square relationship. For example, the lighting brightness of the flash for an object 2 meters away is a quarter of that for an object 1 meter away, so it is difficult to simply determine the required screen brightness. Appropriate flash power often leads to the problem that the screen brightness does not meet the shooting conditions when shooting or video recording

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