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Automatic exposure parameter calibrating method and device based on double-camera system

A technology of automatic exposure and exposure parameters, which is applied in the parts of TV systems, image communication, and color TV parts, etc., can solve problems such as inability to match, brightness deviation, statistical data deviation, etc., to achieve the effect of optimizing the imaging effect.

Active Publication Date: 2017-06-13
X CHIP MICROELECTRONICS TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the difference in the field of view angles of the two camera units in the dual-camera system is not considered, if there is a target object with a brightness different from the common field of view in the unique field of view of the two camera units, it will lead to deviations in statistical data. and finally expose the difference in the convergence target
When the exposure parameters determined based on this are applied to the dual-camera public field of view, the brightness will have a large deviation, and it cannot be matched based on the brightness
In addition, since the difference between the left and right sides of the dual camera module is not considered, even if the same exposure parameters are used, completely different image brightness can be obtained if it is not corrected

Method used

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Embodiment 1

[0026] figure 1 It is a schematic flowchart of a method for calibrating automatic exposure parameters based on a dual-camera system provided in Embodiment 1 of the present invention. The method can be performed by a device for calibrating automatic exposure parameters based on a dual-camera system. The device can use hardware and It may be implemented in a software manner, and may generally be independently configured in a user terminal to implement the method in this embodiment.

[0027] The method of this embodiment specifically includes the following steps:

[0028] S110. Acquire a first image and a second image of a target object based on the first camera and the second camera respectively.

[0029] Wherein, the target object may be the entire scene area to be photographed, or a part of objects or a single object in a multi-object scene, or even a part of a single object. For example, based on the images with the depth of field effect captured by the first camera and the...

Embodiment 2

[0043] Figure 2A A schematic flowchart of a method for calibrating automatic exposure parameters based on a dual-camera system provided in Embodiment 2 of the present invention, as shown in Figure 2A As shown, in this embodiment, on the basis of the foregoing embodiments, it is optional that the acquiring the common field of view of the first camera and the second camera includes: according to the current scene of the first camera and the second camera The distance, the effective camera distance, and the field of view angle determine the common field of view of the first camera and the second camera.

[0044] On the basis of the above technical solutions, the automatic exposure parameter calibration method based on the dual camera system of this embodiment may further include: querying and obtaining the first camera and the second camera according to the current target brightness value of the current public field of view Corresponding exposure parameters; using the exposure...

Embodiment 3

[0086] image 3 Shown is a schematic structural diagram of an automatic exposure parameter calibration device based on a dual-camera system provided in Embodiment 3 of the present invention. The device can be implemented by means of hardware and / or software, and generally can be independently configured in a user terminal The method of this embodiment is realized. Such as image 3 As shown, the automatic exposure parameter calibration device based on the dual camera system specifically includes: an image acquisition module 310 , a brightness value statistics module 320 and an exposure parameter recording module 330 .

[0087] Wherein, the image obtaining module 310 is used to obtain the first image and the second image of the target object based on the first camera and the second camera respectively; the brightness value statistics module 320 is used to obtain the common image of the first camera and the second camera field of view, and count the first brightness value and t...

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Abstract

The embodiment of the invention discloses an automatic exposure parameter calibrating method and device based on a double-camera system. The method comprises the steps of: respectively acquiring a first image and a second image of a target object on the basis of a first camera and a second camera; acquiring a common view field of the first camera and the second camera, and respectively carrying out statistics on a first brightness value and a second brightness value of pixel regions in the first image and the second image, which are positioned in the common view field; and regulating exposure parameters so as to enable the first brightness value and the second brightness value to be the same and respectively reach at least one preset target brightness value, and respectively recording exposure parameters of the first camera and the second camera, which corresponds to the preset target brightness value. According to the technical scheme of the embodiment of the invention, not only is inconsistency of brightness response of the first camera and the second camera in the double-camera system compensated, but also double-camera exposure is cooperatively controlled by utilizing a common statistic quantity of the images of the double-camera system, brightness consistency of the double-camera system is implemented.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electronic equipment, and in particular to an automatic exposure method and device based on a dual camera system. Background technique [0002] Due to the powerful functions it brings, such as background blur, post-focus, optical zoom, and dark state enhancement, the dual-camera system (hereinafter referred to as "dual-cam") has gradually become the standard configuration of smartphones. [0003] The matching algorithm is the main factor affecting the accuracy and effect of the dual-camera algorithm. The matching algorithm is a search algorithm based on the grayscale, color, and sharpness of the image. The matching algorithm will perform dual-camera view matching based on the above three dimensions of image evaluation. Only when the matching algorithm is used to accurately find out the corresponding relationship between the pixels between the two images, can the cross information of...

Claims

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Application Information

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IPC IPC(8): H04N5/235
CPCH04N23/71H04N23/73
Inventor 江浩郭鑫魏孜宸
Owner X CHIP MICROELECTRONICS TECH CO LTD
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