Method and system for adjusting automatic exposure

An automatic exposure and measurement technology, which is applied to TV system components, color TV components, TVs, etc., can solve the problem of limiting the adjustable range of exposure, so as to prevent flickering changes in the screen and expand the adjustable range Effect

Inactive Publication Date: 2015-07-01
LEADCORE TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The reason is that the camera sets a fixed frame rate b

Method used

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  • Method and system for adjusting automatic exposure
  • Method and system for adjusting automatic exposure
  • Method and system for adjusting automatic exposure

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Embodiment Construction

[0028] The embodiment of the present invention describes a method for quickly and accurately adjusting the frame rate according to the brightness of the current picture to expand the adjustable exposure range of the camera device.

[0029] figure 1 A structural block diagram of an imaging device according to an embodiment of the present invention is shown. refer to figure 1 As shown, the camera device 100 may include an image sensor 110 , an image signal processing (Image Signal Processing, ISP) module 120 and an image control system 130 . The image sensor 110 is used to receive light and convert it into electrical signals that can be recognized and processed by subsequent modules. Image sensor 110 contains registers 111 to configure its parameters, such as exposure value, gain, etc. The image signal processing module 120 can calculate the aforementioned parameters for use by the image sensor 110 . The image control system 130 controls the operation of the image sensor 110...

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Abstract

The invention relates to a method and a system for adjusting an automatic exposure, which are used for a camera device. The method comprises the following steps: a, calculating a deviation measure value according to current brightness and target brightness of a picture of the camera device; b, comparing the deviation measure value with a frame reduction threshold value and a frame increasing threshold value respectively to determine a way of adjusting the frame rate of the camera device; reducing the frame rate of the camera device when the deviation measure value is smaller than the frame reduction threshold value and gain of the camera device reaches the maximum gain; increasing the frame rate of the camera device when the deviation measure value is greater than or equal to the frame reduction threshold value; keeping the frame rate of the camera device when the deviation measure value is greater than the frame reduction threshold value and is smaller than the frame increasing threshold value, wherein the frame reduction threshold value is smaller than the frame increasing threshold value.

Description

technical field [0001] The invention relates to an imaging device, in particular to a method and a system for adjusting automatic exposure in the imaging device. Background technique [0002] Camera devices, such as cameras and / or video cameras, have become an essential component of various portable electronic devices. People use portable electronic devices such as mobile phones, tablet computers or digital compact cameras to capture the events of everyday life. The characteristic of this type of application is to focus on the convenience of use, and the requirements for shooting quality are secondary. Therefore, it is expected that the camera device can automatically adjust its parameters to a reasonable range without user intervention, so that users can directly to shoot. Exposure is an important parameter among many parameters. [0003] Auto-exposure means that the camera device automatically adjusts the exposure according to the intensity of the light, so as to preven...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N5/235
Inventor 张婷柴永亮陈爽
Owner LEADCORE TECH
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