A kind of automatic exposure method and mobile terminal

A mobile terminal and automatic exposure technology, which is applied to TVs, color TV parts, TV system parts, etc. It can solve the problems of difficult to distinguish details in dark areas of images, overexposure of local areas of captured images, and low dynamic range.

Active Publication Date: 2018-12-04
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an automatic exposure method and a mobile terminal to solve the problem that local areas of captured images are overexposed or too dark due to the low dynamic range of the color sensor, making it difficult to distinguish details in dark areas of the image, and unable to take pictures expected by users.

Method used

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  • A kind of automatic exposure method and mobile terminal
  • A kind of automatic exposure method and mobile terminal
  • A kind of automatic exposure method and mobile terminal

Examples

Experimental program
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Effect test

no. 1 example

[0027] The embodiment of the present invention is applied to a mobile terminal with a camera function, such as a smart phone, a tablet computer, etc., and the mobile terminal includes a color camera and a black and white camera. Such as figure 1 As shown, the flow chart of the automatic exposure method provided by the first embodiment of the present invention, the method includes:

[0028] Step 101. Obtain a color image and a black-and-white image synchronously captured by the color camera and the black-and-white camera.

[0029] In the embodiment of the present invention, after entering the photographing mode, the color image and the black-and-white image synchronously captured by the color camera and the black-and-white camera start to be acquired.

[0030] In the embodiment of the present invention, the color image is captured by a color camera, and the black and white image is captured by a black and white camera. Wherein, no matter the image captured by the color camera...

no. 2 example

[0041] The embodiment of the present invention is applied to a mobile terminal with a camera function, such as a smart phone, a tablet computer, etc., and the mobile terminal includes a color camera and a black and white camera. Such as figure 2 Shown is a flow chart of the automatic exposure method in the second embodiment of the present invention, the method in this embodiment includes:

[0042] Step 201, acquire the color image and black-and-white image synchronously captured by the color camera and the black-and-white camera.

[0043] In the embodiment of the present invention, after entering the photographing mode, the color image and the black-and-white image synchronously captured by the color camera and the black-and-white camera start to be acquired.

[0044]In the embodiment of the present invention, the color image is captured by a color camera, and the black and white image is captured by a black and white camera. Wherein, no matter the image captured by the col...

no. 3 example

[0093] Such as image 3 As shown, it is a structural block diagram of the mobile terminal provided by the third embodiment of the present invention. image 3 The mobile terminal 300 shown includes: an acquisition module 301 , a calculation module 302 , an adjustment module 303 , and a control module 304 .

[0094] The acquiring module 301 is configured to acquire the color image and black-and-white image that are synchronously captured by the color camera and the black-and-white camera.

[0095] Wherein, when the mobile terminal 300 enters the camera mode, the acquisition module 301 will continuously acquire color images from the color camera, acquire black and white images from the black and white camera, and use frame synchronization to make the image time stamps of the black and white camera consistent with those of the color camera.

[0096] The calculation module 302 is configured to calculate the color brightness value of the color image acquired by the acquisition modu...

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Abstract

The present invention provides an automatic exposure method, which is applied to a mobile terminal. The mobile terminal includes a color camera and a black-and-white camera. The automatic exposure method includes: acquiring a color image and a black-and-white image synchronously collected by the color camera and the black-and-white camera; Calculating the color brightness value of the color image and the black and white brightness value of the black and white image; adjusting the exposure parameters of the color camera according to the color brightness value and the black and white brightness value; according to the adjusted exposure parameters, Controlling the color camera for exposure. The invention also provides a corresponding mobile terminal. The automatic exposure method provided by the present invention combines a color camera with a black-and-white camera to adjust the exposure parameters of the color camera, and can perform more scientific exposure settings for the current scene to achieve more accurate exposure, thereby effectively solving the shooting problem caused by the low dynamic range of the color camera The problem of overexposure or overdarkening of local areas of the image.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to an automatic exposure method and a mobile terminal. Background technique [0002] With the popularity of smart phones, users have higher and higher requirements for the image display quality of smart phones. Exposure is a key factor that determines the final effect of photos. At present, the automatic exposure method is widely used in smart phone cameras. [0003] The existing automatic exposure metering methods of smartphone cameras are set based on the image information of the color camera, and the weight of most metering methods such as spot metering, central weighted metering, and average metering are directly set , only the weight of the multi-area evaluative metering method is dynamically set based on the differences between different areas of the current frame. No matter which metering method is based on the image information of the current color camera, only some meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
CPCH04N23/73H04N23/74
Inventor 严思志万美君
Owner VIVO MOBILE COMM CO LTD
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