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A Smart AE Algorithm for Mobile Phone Flash Camera

A mobile phone and smart technology, applied in the field of mobile phone flash photography intelligent AE algorithm, can solve the problem of unreasonable control of exposure time, unable to automatically adjust the main flash current, etc., to avoid overexposure or underexposure, and maximize battery efficiency , the effect of enhancing the experience

Inactive Publication Date: 2018-03-02
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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AI Technical Summary

Problems solved by technology

However, the above method still has shortcomings. It cannot automatically adjust the main lightning flow, and it still cannot reasonably control the exposure time.

Method used

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  • A Smart AE Algorithm for Mobile Phone Flash Camera

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Embodiment

[0030] Such as figure 1 Shown, the present embodiment a kind of smart AE algorithm of mobile phone flash photography, comprises the following steps:

[0031] Step 1. In a dark environment, activate the mobile phone camera function, turn on the flash or use the Auto flash setting;

[0032] Step 2. Press the camera button to take a picture, and the camera first starts the flash pre-flash mechanism;

[0033] Step 3. The sensor detects the return light intensity of the subject during the pre-flash. In this step, the method of detecting the return light intensity is: detect according to the imaging principle of the sensor. When the return light is different, the charge released by the photodiode is also different. . In addition, when taking a photo, the exposure is based on the subject as the main exposure object, so the exposure effect is carried out to meet the subject. ;

[0034] Step 4.ISP (Image Signal Processor) or mobile phone platform image processing chip analyzes the ...

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Abstract

The invention discloses an intelligent AE algorithm for mobile phone flash photography, which includes the following steps: S1, in a dark environment, start the camera function of the mobile phone, turn on the flashlight or perform Auto flash setting; S2, press the camera button, and the camera starts the flashlight pre-flash Mechanism; S3. The sensor detects the light intensity returned by the subject during the pre-flash; S4. The processor chip analyzes the light signal received by the sensor from the subject; S5. According to the analysis result, automatically adjust the optimal main lightning current intensity and AE compensation value; if the return light is strong, the main flash will reduce the main flash current and AE compensation value accordingly, and if the return light is weak, the main flash will increase the main flash current and AE compensation value accordingly. The present invention avoids over-exposure or under-exposure of the imaging picture taken by the flashlight, and at the same time can reasonably distribute the current and power of the flashlight of the mobile phone camera, so as to maximize the battery use efficiency.

Description

technical field [0001] The invention relates to the technical field of mobile phone image processing, in particular to an intelligent AE algorithm for mobile phone flash photography. Background technique [0002] The mobile phone uses its built-in flash to take pictures, and the flash flash is divided into two stages, namely the pre-flash and main flash stages. And at present, when a mobile phone uses a flash to take pictures, the mobile phone system will provide a fixed current to the flash. When using a flash to take pictures at close range or at a long distance, either the short-range flash is overexposed, or the long-distance flash is insufficiently bright. It is dark, and it is difficult to achieve a relatively perfect AE (automatic exposure) control for both long-range and short-range imaging. An exposure control method for an imaging device in the prior art, the device generally includes: an optical system; a sensor that performs color coding by using high-sensitivit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232H04M1/725H04N23/40
Inventor 彭植远胡铂蔡叶生
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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