Automatic exposure method and mobile terminal

A mobile terminal, automatic exposure technology, applied in the field of mobile communications, 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: 2016-08-03
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 d

Method used

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  • Automatic exposure method and mobile terminal

Examples

Experimental program
Comparison scheme
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 Shown is a flowchart of the automatic exposure method provided by the first embodiment of the present invention, and the method includes:

[0028] Step 101: Acquire a color image and a black and white image that are synchronously collected 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 collected by the color camera and the black and white camera are acquired.

[0030] In the embodiment of the present invention, a color image is captured by a color camera, and a black and white image is captured by a black and white camera. Wherein, the image captured by the color camera or the black-and-white camera h...

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 As shown, it is a flowchart of the automatic exposure method in the second embodiment of the present invention. The method in this embodiment includes:

[0042] Step 201: Acquire a color image and a black and white image that are synchronously collected 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 collected by the color camera and the black and white camera are acquired.

[0044] In the embodiment of the present invention, a color image is captured by a color camera, and a black and white image is captured by a black and white camera. Wherein, the image captured by the color camera or the black-and...

no. 3 example

[0093] Such as image 3 As shown, it is a structural block diagram of a 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 a color image and a black and white image that are synchronously collected by the color camera and the black and white camera.

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

[0096] The calculation module 302 is configured to calculate the color brightness value of the color image obtained by the obtaining module 301 and the black a...

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Abstract

The present invention provides an automatic exposure method applied to a mobile terminal. The mobile terminal includes a color camera and a black-and-white camera. The automatic exposure method comprises the steps of obtaining the color image of the color camera and the black-and-white image of the black-and-white camera, wherein the two images are acquired synchronously; calculating the color intensity value of the color image and the black-and-white intensity value of the black-and-white image; according to the color intensity value of the color image and the black-and-white intensity value of the black-and-white image, adjusting the exposure parameters of the color camera; according to the adjusted exposure parameters of the color camera, controlling the exposure of the color camera. The present invention also provides a corresponding mobile terminal. Based on the automatic exposure method of the present invention, the exposure parameters of the color camera can be adjusted based on the combination of the color camera and the black-and-white camera, so that the exposure setting for the current scene can be configured more scientifically. The more accurate exposure is realized. Therefore, the problem in the prior art that the color camera is small in dynamic range so as to cause the overexposure/over-dark condition of the local region of a photographed image can be effectively solved.

Description

Technical field [0001] The present 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 in determining the final effect of photos. At present, the automatic exposure method is widely used in smart phone cameras. [0003] The automatic exposure metering method of the existing smart phone camera is set based on the image information of the color camera. Most of the metering methods such as spot metering, central weight metering, and average metering weights are set directly , Only the weight of multi-zone evaluative metering method is dynamically set based on the difference between different regions of the current frame. Regardless of the light metering method, it is based on the image information of the current color camera, and only...

Claims

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Application Information

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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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