CN105007429A - Method and system for elimination scintillation, and mobile terminal - Google Patents
Method and system for elimination scintillation, and mobile terminal Download PDFInfo
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- CN105007429A CN105007429A CN201510487444.7A CN201510487444A CN105007429A CN 105007429 A CN105007429 A CN 105007429A CN 201510487444 A CN201510487444 A CN 201510487444A CN 105007429 A CN105007429 A CN 105007429A
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- flicker
- sensing mode
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- mobile terminal
- exposure
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Abstract
The invention discloses a method and system for elimination scintillation, and a mobile terminal. The method comprises the following steps that: a mobile terminal turns on a camera to enter a high sensitivity mode; current environment light is detected, and if the scintillation frequency of the current environment light is detected to be M HZ and the M is larger than 40 and smaller than 100 HZ and the exposure time T is less than a scintillation period 2/M of the current environment light, an instruction for switching a photosensitive mode is sent to the mobile terminal; and after the mobile terminal receives the instruction, switching to a low sensitivity mode is realized, N-fold exposure time is prolonged under the circumstances that identical brightness is guaranteed, and then the exposure time is adjusted to be an integral multiple of the scintillation period to eliminate scintillation. According to the invention, the high sensitivity mode is used on the normal condition; once the current scintillation frequency is detected by the algorithm and the exposure time is less than the scintillation period, switching to the low sensitivity mode is realized, thereby prolonging the exposure time being an integral multiple of the scintillation period. Therefore, a problem that scintillation can not be eliminated due to too short exposure time can be solved.
Description
Technical field
The present invention relates to communication terminal technology field, more particularly, relate to a kind of method, system and the mobile terminal of eliminating flicker.
Background technology
Present mobile terminal (as mobile phone etc.) camera all adopts the transducer of CMOS (Complementary Metal Oxide Semiconductor) substantially, when not upon exposure being the integral multiple in light flash cycle, flicker will be produced, namely Hz noise, by AFD and AEC algorithm, mobile terminal can detect current light flash frequency (being generally 50HZ/60HZ), meets above-mentioned condition eliminate flicker by the adjustment time for exposure.
But technique scheme still can't resolve a problem: namely current environment brightness is very high, when causing the time for exposure short especially, such as current light source is 50HZ, its flicker cycle is 0.01s, 0.01s is less than once the time for exposure, just can not meet the condition of integral multiple again, the flicker in this time just cannot eliminate.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of method, system and the mobile terminal of eliminating flicker are provided.
For achieving the above object, technical scheme provided by the invention is as follows: a kind of method eliminating flicker, and the method comprises the following steps:
Mobile terminal opens camera, enters high light sensing mode;
Detect current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send the instruction switching light sensing mode to mobile terminal;
After mobile terminal receives instruction, switch to low light sensing mode, extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates glimmer when ensureing that brightness is constant.
As preferably, open camera at mobile terminal, enter in the step of high light sensing mode, described mobile terminal supports two kinds of patterns: high light sensing mode and low light sensing mode, and the flicker cycle of described high light sensing mode is set to the N of low light sensing mode flicker cycle doubly.
As preferably, at detection current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send to mobile terminal in the step of the instruction switching light sensing mode
Detect current environment light by AFD and AEC algorithm, thus the flicker frequency of current environment light detected.
As preferably, after receiving instruction when mobile terminal, switch to low light sensing mode, the N time for exposure is doubly extended when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminate in the step of flicker when ensureing that brightness is constant, after mobile terminal receives instruction, the method switching to low light sensing mode is:
High light sensing mode is realized to low light sensing mode switching by adjustment capacitance, and the size namely by adjusting capacitance regulates N value size.
As preferably, after receiving instruction when mobile terminal, switch to low light sensing mode, the N time for exposure is doubly extended when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminate when ensureing that brightness is constant in the step of Hz noise, the adjustment time for exposure, to be the method for the integral multiple of a surround lighting flicker cycle be:
By adjustment gain, the time for exposure after adjusting is made to be the integral multiple of a current environment light flicker cycle.
The present invention also provides a kind of system eliminating flicker, and this system comprises:
Illuminant module, opens camera for mobile terminal, enters high light sensing mode,
Detection module, for detecting current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send the instruction switching light sensing mode to mobile terminal;
Executive Module, for after mobile terminal receives instruction, switches to low light sensing mode, and extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates glimmer when ensureing that brightness is constant.
As preferably, described illuminant module comprises: high illuminant module and low illuminant module, and the flicker cycle of described high illuminant module is set to the N of low illuminant module flicker cycle doubly, and N is integer.
As preferably, described detection module comprises AFD algorithm detection module and AEC algorithm detection module, the flicker frequency of current environment light detected by AFD algorithm detection module and AEC algorithm detection module.
As preferably, described Executive Module comprises light sensing mode handover module and gain regulation module,
Described light sensing mode handover module, switch to low light sensing mode for realizing high light sensing mode by adjustment capacitance, the size namely by adjusting capacitance regulates N value size;
Described gain regulation module, for adjusting gain, makes the time for exposure after adjusting be the integral multiple of a current environment light flicker cycle.
The present invention also provides a kind of mobile terminal, and this mobile terminal comprises the system of above-mentioned elimination flicker.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention uses high light sensing mode under normal circumstances, once AFD algorithm current flicker frequency detected and the time for exposure is less than flicker cycle time, just be switched to low light sensing mode, thus elongate the time for exposure, make it the integral multiple becoming flicker cycle, thus overcome the problem causing flicker to eliminate because the time for exposure is too short.
2, the present invention realizes the prolongation of time for exposure by adjustment gain, thus the adjustment time for exposure is the integral multiple of surround lighting flicker cycle, and eliminate flicker when ensureing that brightness is constant, adjustment process is simple and convenient, better experiences to user.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow diagram of the elimination flicker that the embodiment of the present invention one provides;
Fig. 2 is the method flow diagram of the elimination flicker that the embodiment of the present invention two provides;
Fig. 3 is the system block diagram of the elimination flicker that the embodiment of the present invention three provides;
Fig. 4 is the system block diagram of the elimination flicker that the embodiment of the present invention four provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Embodiments of the invention one provide a kind of method eliminating flicker, are described in detail to the present embodiment below in conjunction with accompanying drawing.Fig. 1 is the method flow diagram of the embodiment of the present invention one, please refer to Fig. 1, and the method for the embodiment of the present invention comprises the following steps:
Step S101, mobile terminal open camera, enter high light sensing mode;
Step S102, detection current environment light, if detect that the flicker frequency of current environment light is MHZ, 40 < M < 100HZ are 50HZ or 60HZ under normal circumstances;
Step S103, time for exposure T are less than a flicker cycle 2/M of current environment light;
Step S104, to send to mobile terminal and switch the instruction of light sensing mode;
Step S105, after mobile terminal receives instruction, switch to low light sensing mode, when ensureing that brightness extends the N time for exposure doubly identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates flicker when ensureing that brightness is constant.
The present invention uses high light sensing mode under normal circumstances, once AFD algorithm current flicker frequency detected and the time for exposure is less than flicker cycle time, just be switched to low light sensing mode, thus elongate the time for exposure, make it the integral multiple becoming flicker cycle, thus overcome the problem causing flicker to eliminate because the time for exposure is too short.
Embodiment two
Embodiments of the invention two provide a kind of method eliminating flicker, are the improvement carried out on the basis of embodiment one.Fig. 2 is the method flow diagram of the embodiment of the present invention two, please refer to Fig. 2, and the method for the embodiment of the present invention comprises the following steps:
Step S201, mobile terminal open camera, enter high light sensing mode; Suppose that current light flicker frequency is 50HZ, and brightness is very high, cause current exposure time to be 0.005S, gain gain is 1, is so just certain to this time occur flicker flicker;
Described mobile terminal supports two kinds of patterns: high light sensing mode and low light sensing mode, and the flicker cycle of described high light sensing mode is set to the N of low light sensing mode flicker cycle doubly.
Step S202, detect current environment light by AFD and AEC algorithm, detect that the flicker frequency of current environment light is M HZ;
If step S203 time for exposure T is less than a flicker cycle 2/M of current environment light,
Step S204, then send to mobile terminal and switch the instruction of light sensing mode, such as, detect that current environment light is 50HZ, and when finding that the time for exposure is less than flicker cycle (0.01s), send the instruction switching light sensing mode to mobile terminal;
Step S205, after mobile terminal receives instruction, regulate N value size by adjusting the size of capacitance;
Step S206, when ensureing that brightness extends the N time for exposure doubly identical; Such as after transducer receives appointment, switch to low light sensing mode, the time for exposure at this time in guarantee same brightness situation should be exactly 0.005*N, gain is 1, as long as so N is enough large, so just substantially can contain very bright environment;
Step S207, by adjustment gain, adjustment the time for exposure be the integral multiple of flicker cycle;
Time for exposure after step S208, adjustment is the integral multiple of a current environment light flicker cycle, eliminates flicker when ensureing that brightness is constant.Suppose that N is 5 times, so the time for exposure is 0.025s, this time by adjustment gain, the time for exposure can be allowed to be 0.02S (for integral multiple), and gain is 1.25, so just can ensure brightness constant and elimination flicker.
The present invention realizes the prolongation of time for exposure by adjustment gain, thus the adjustment time for exposure is the integral multiple of surround lighting flicker cycle, and eliminate flicker when ensureing that brightness is constant, adjustment process is simple and convenient, better experiences to user.
Embodiment three
Embodiments of the invention three provide a kind of system eliminating flicker, please refer to Fig. 3, the system of the embodiment of the present invention comprises illuminant module 1, detection module 2 and Executive Module 3, described illuminant module 1, detection module 2 and Executive Module 3 are linked in sequence, and are described in detail below by the function of each module.
Illuminant module 1, opens camera for mobile terminal, enters high light sensing mode,
Detection module 2, for detecting current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send the instruction switching light sensing mode to mobile terminal;
Executive Module 3, for after mobile terminal receives instruction, switches to low light sensing mode, and extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates glimmer when ensureing that brightness is constant.
Embodiment four
Embodiments of the invention four provide a kind of system eliminating flicker, please refer to Fig. 4, the difference of the system of the embodiment of the present invention and the system of above-described embodiment three is, described illuminant module 1 comprises: high illuminant module 11 and low illuminant module 12, the flicker cycle of described high illuminant module 11 is set to the N of low illuminant module 12 flicker cycle doubly, and N is integer;
Described detection module 2 comprises AFD algorithm detection module 21 and AEC algorithm detection module 22, the flicker frequency of current environment light detected by AFD algorithm detection module 21 and AEC algorithm detection module 22.
Described Executive Module 3 comprises light sensing mode handover module 31 and gain regulation module 32,
Described light sensing mode handover module 31, switch to low light sensing mode for realizing high light sensing mode by adjustment capacitance, the size namely by adjusting capacitance regulates N value size;
Described gain regulation module 32, for adjusting gain, makes the time for exposure after adjusting be the integral multiple of a current environment light flicker cycle.
Embodiment five
Inventive embodiment five provides a kind of mobile terminal, and this mobile terminal comprises the system of above-mentioned elimination flicker, can a kind of method eliminating flicker corresponding to application of aforementioned, and details, see the description of above-described embodiment one to embodiment four, do not repeat them here.
It should be noted that, a kind of communication terminal that above-described embodiment provides, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by system is divided into different functional modules, to complete all or part of function described above.In addition, this communication terminal can be mobile phone, panel computer, human-computer interaction terminal or other there is the communication terminal device of Menu key.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. eliminate a method for flicker, it is characterized in that, the method comprises the following steps:
Mobile terminal opens camera, enters high light sensing mode;
Detect current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send the instruction switching light sensing mode to mobile terminal;
After mobile terminal receives instruction, switch to low light sensing mode, extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates glimmer when ensureing that brightness is constant.
2. the method eliminating flicker according to claim 1, it is characterized in that, camera is opened at mobile terminal, enter in the step of high light sensing mode, described mobile terminal supports two kinds of patterns: high light sensing mode and low light sensing mode, and the flicker cycle of described high light sensing mode is set to the N of low light sensing mode flicker cycle doubly.
3. a kind of method eliminating flicker according to claim 1, it is characterized in that, at detection current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send to mobile terminal in the step of the instruction switching light sensing mode
Detect current environment light by AFD and AEC algorithm, thus the flicker frequency of current environment light detected.
4. a kind of method eliminating flicker according to claim 1, it is characterized in that, after receiving instruction when mobile terminal, switch to low light sensing mode, extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates in the step of glimmering when ensureing that brightness is constant, after mobile terminal receives instruction, the method switching to low light sensing mode is:
High light sensing mode is realized to low light sensing mode switching by adjustment capacitance, and the size namely by adjusting capacitance regulates N value size.
5. a kind of method eliminating flicker according to claim 1, it is characterized in that, after receiving instruction when mobile terminal, switch to low light sensing mode, the N time for exposure is doubly extended when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates in the step of flicker when ensureing that brightness is constant, and the adjustment time for exposure, to be the method for the integral multiple of a surround lighting flicker cycle be:
By adjustment gain, the time for exposure after adjusting is made to be the integral multiple of a current environment light flicker cycle.
6. eliminate a system for flicker, it is characterized in that, this system comprises:
Illuminant module, opens camera for mobile terminal, enters high light sensing mode,
Detection module, for detecting current environment light, if detect that the flicker frequency of current environment light is M HZ, 40 < M < 100HZ, and time for exposure T is less than a flicker cycle 2/M of current environment light, then send the instruction switching light sensing mode to mobile terminal;
Executive Module, for after mobile terminal receives instruction, switches to low light sensing mode, and extend the N time for exposure doubly when guarantee brightness is identical, then adjusting the time for exposure is the integral multiple of flicker cycle, eliminates glimmer when ensureing that brightness is constant.
7. the system eliminating flicker according to claim 6, it is characterized in that, described illuminant module comprises: high illuminant module and low illuminant module, and the flicker cycle of described high illuminant module is set to the N of low illuminant module flicker cycle doubly, and N is integer.
8. the system eliminating flicker according to claim 6, it is characterized in that, described detection module comprises AFD algorithm detection module and AEC algorithm detection module, the flicker frequency of current environment light detected by AFD algorithm detection module and AEC algorithm detection module.
9. the system eliminating flicker according to claim 6, it is characterized in that, described Executive Module comprises light sensing mode handover module and gain regulation module,
Described light sensing mode handover module, switch to low light sensing mode for realizing high light sensing mode by adjustment capacitance, the size namely by adjusting capacitance regulates N value size;
Described gain regulation module, for adjusting gain, makes the time for exposure after adjusting be the integral multiple of a current environment light flicker cycle.
10. a mobile terminal, is characterized in that, comprises the system of the elimination flicker according to any one of claim 6-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002951.0A CN108174117B (en) | 2015-08-10 | 2015-08-10 | Method and system for eliminating flicker, mobile terminal and medium product |
| CN201510487444.7A CN105007429B (en) | 2015-08-10 | 2015-08-10 | A kind of method, system and mobile terminal for eliminating flicker |
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| CN201510487444.7A CN105007429B (en) | 2015-08-10 | 2015-08-10 | A kind of method, system and mobile terminal for eliminating flicker |
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| CN201810002951.0A Division CN108174117B (en) | 2015-08-10 | 2015-08-10 | Method and system for eliminating flicker, mobile terminal and medium product |
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| CN201810002951.0A Expired - Fee Related CN108174117B (en) | 2015-08-10 | 2015-08-10 | Method and system for eliminating flicker, mobile terminal and medium product |
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| WO2017210897A1 (en) * | 2016-06-08 | 2017-12-14 | Huawei Technologies Co., Ltd. | Image processing apparatus, and image processing method |
| CN109151256A (en) * | 2018-08-31 | 2019-01-04 | 惠州华阳通用电子有限公司 | A kind of camera flashing removing method and device based on sensor detection |
| CN110913149A (en) * | 2019-11-04 | 2020-03-24 | Oppo广东移动通信有限公司 | Control method, electronic device, and storage medium |
| CN111083384A (en) * | 2019-12-06 | 2020-04-28 | Oppo广东移动通信有限公司 | Exposure adjusting method and device, electronic equipment and storage medium thereof |
| CN111314594A (en) * | 2020-03-19 | 2020-06-19 | 闻泰通讯股份有限公司 | Camera module, control method and device, electronic equipment and storage medium |
| CN112188109A (en) * | 2019-07-04 | 2021-01-05 | 深圳市航盛电子股份有限公司 | Camera debugging method and device and electronic equipment |
| WO2021208923A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳市万普拉斯科技有限公司 | Method and apparatus for eliminating flicker during photographing, photographing device, and readable storage medium |
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| WO2017210897A1 (en) * | 2016-06-08 | 2017-12-14 | Huawei Technologies Co., Ltd. | Image processing apparatus, and image processing method |
| CN109151256A (en) * | 2018-08-31 | 2019-01-04 | 惠州华阳通用电子有限公司 | A kind of camera flashing removing method and device based on sensor detection |
| CN109151256B (en) * | 2018-08-31 | 2020-12-08 | 惠州华阳通用电子有限公司 | Camera flicker elimination method and device based on sensor detection |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105007429B (en) | 2018-01-19 |
| CN108174117B (en) | 2021-04-02 |
| CN108174117A (en) | 2018-06-15 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |