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Intelligent AE algorithm for flash photography of mobile phone

A mobile phone and flash technology, which is applied in the direction of TV, telephone communication, color TV parts, etc., can solve the problems of unable to automatically adjust the main lightning flow, and can not reasonably control the exposure time, so as to avoid overexposure or underexposure, Maximize battery efficiency and enhance user experience

Active Publication Date: 2014-02-12
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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  • Intelligent AE algorithm for flash photography of mobile phone

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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 the flash photography of a mobile phone. The intelligent AE algorithm for the flash photography of the mobile phone comprises the following steps that S1, in a dark environment, a camera function of the mobile phone is started, and a flashlight is started or Auto flashlight setting is carried out; S2, a photographing key is pressed, and a camera starts a flashlight preflashing mechanism; S3, a sensor detects the intensity of light returning from an object to be shot in the preflashing process; S4, a processor chip analyzes light signals received by the sensor and returning from the object to be shot; S5, the best main flashlight current intensity and an AE compensation value are automatically regulated according to the analysis result; if the retuning light is intense, a main flashlight correspondingly lowers the main flashlight currents and the AE compensation value, and if the returning light is weak, the main flashlight correspondingly improves the main flashlight currents and the AE compensation value. The intelligent AE algorithm for the flash photography of the mobile phone avoids overexposure and underexposure of images when the flashlight is used for taking photos, can reasonably distribute the currents and electricity quantity of the flashlight of camera of the mobile phone at the same time, and maximizes the use efficiency of a battery.

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 Applications(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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