Focal length adjustment method, focal length adjustment device and terminal

Abstract

The invention provides a focal length adjustment method, a focal length adjustment device and a terminal. The terminal is provided with a zoom camera. The terminal is further provided with a distance measurement device which carries out distance measurement through transmitting and receiving laser signals. The method comprises the steps of controlling the distance measurement device to measure first distance between the zoom camera and a shot object when shooting is carried out by using the zoom camera; and adjusting the focal length of the zoom camera according to the first distance. According to the invention, the distance between the camera and the shot object is measured through laser, and thus accurate focusing is realized according to the measured distance.

Description

technical field [0001] The present invention relates to the field of terminals, in particular to a focus adjustment method, device and terminal. Background technique [0002] With the popularization of consumer electronic products such as smartphone terminals and tablets, terminals with zoom and high-resolution cameras have become very popular, and digital card cameras have been basically replaced by mobile terminals with high-pixel zoom cameras. [0003] Among them, the automatic zoom function can be realized in the following two ways: [0004] <Method 1> Using the principle of object light reflection, determine the distance between the object to be photographed and the camera, so as to automatically adjust the focal length; [0005] <Method 2> Realize automatic focus by detecting the contour edge of the image. [0006] But at present, terminals with cameras have not shaken the SLR camera market. The reason why there is no shaking is because the camera of the...

AI Technical Summary

Problems solved by technology

[0006] But at present, terminals with cameras have not shaken the SLR camera market

The reason why there is no shaking is because the camera of the terminal can’t capture the layered feeling of the image, and it can’t really meet the user’s framing requirements in a certain scene

For example, if you take a view from a dark place to a bright place, or if there are other larger objects in front of the object photographed by the mobile terminal, the camera of the terminal cannot focus correctly, and cannot determine where the user is focusing on the object, that is, The close-range is clear and the distant view is blurred or the distant view is clear and the near-field is blurred by the SLR

For another example, when using a terminal camera to take pictures, since the subject changes before and after the focal length, automatic zooming often results in blurred images due to frequent focusing

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