Focus processing method and device, and terminal device

Abstract

The invention discloses a focus processing method and device, and a terminal device. The focus processing method is applied to the terminal device with a master camera module and a secondary camera module. Each light filter unit in the secondary camera module corresponds to a combination pixel in a secondary image sensor. Each combination pixel comprises at least n adjacent pixels. The n is an even number greater than 2. The method comprises the steps of obtaining a first image collected by left n / 2 pixels and a second image collected by right n / 2 pixels of the same combination pixel in the secondary camera module; judging whether phase difference between the first image and the second image is in a preset range or not; and if the phase difference is not in the preset range, controlling a master motor in the master camera module to drive a master camera to move according to a preset strategy and the phase difference. The focus precision and speed are improved, the rapid focus cost is reduced, and the quality of the image photographed by the terminal device is improved.

Description

technical field [0001] The present invention relates to the technical field of photography, in particular to a focus processing method, device and terminal equipment. Background technique [0002] With the development of smart phones, the requirements for camera functions of mobile phones are getting higher and higher, especially the fast focusing function, because only after fast focusing can a clear scene be quickly captured. [0003] At present, the fast focus processing method used is through Dual Pixel CMOS AF (Dual Pixel CMOS AF). Each pixel on the image sensor corresponds to the same microlens, and two photodiodes are configured. During autofocus, through two photodiodes, each pixel can obtain two signals (A image and B image) at the same time at a time, and calculate the driving amount and driving direction of the camera by comparing the parallax signals of A image and B image, and then Drive the camera to focus. [0004] However, in the aforementioned Dual Pixel C...

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Problems solved by technology

[0004] However, in the above-mentioned Dual Pixel CMOS AF method, the area of ​​the photosensitive element in the image sensor must be large, reaching 1 / 2.5 inch, so that the size of the pixel needs to be 1.44 microns (um)

This makes the height of the camera module need to be increased a lot, increasing the difficulty of structural design and installation in the mobile phone, and the number of pixels will be greatly reduced, and the increase in the area of ​​the photosensitive element and the pixel area will also make the camera module. Increased costs

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