CN102724406A - Method for realizing global shutter function of complementary metal-oxide semiconductor (CMOS) snap-shot video camera - Google Patents
Method for realizing global shutter function of complementary metal-oxide semiconductor (CMOS) snap-shot video camera Download PDFInfo
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- CN102724406A CN102724406A CN2012102136187A CN201210213618A CN102724406A CN 102724406 A CN102724406 A CN 102724406A CN 2012102136187 A CN2012102136187 A CN 2012102136187A CN 201210213618 A CN201210213618 A CN 201210213618A CN 102724406 A CN102724406 A CN 102724406A
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Abstract
The invention discloses a method for realizing a global shutter function of a complementary metal-oxide semiconductor (CMOS) snap-shot video camera; a liquid crystal panel is arranged in front of a CMOS sensor of the CMOS snap-shot video camera and behind a lens; line exposure time is adjusted, so that the line exposure of the last line is started before the line exposure of a first line is completed; after the line exposure of the first line is started, the liquid crystal panel is opened and turns from an opaque state to a transparent state, and the line exposure of the last line is started when the liquid crystal panel is converted into the transparent state; when the line exposure of the last line is started, an external light source is lightened on; and when the external light source is turned off, the liquid crystal panel is closed and turns to the opaque state. According to the method for realizing the global shutter function of the CMOS snap-shot video camera, the imaging quality of the CMOS snap-shot video camera can be improved and the cost can be effectively controlled.
Description
Technical field
The present invention relates to the method that a kind of CMOS of realization captures video camera global shutter function, particularly relate to a kind of through setting up a liquid crystal panel and it being controlled and can realize the method for CMOS candid photograph video camera global shutter function.
Background technology
It is a kind of video camera that is in daily use at present that CMOS captures video camera, because it has the advantage of aspects such as cost is low, speed is fast, resolution is high, low in energy consumption, in safety monitoring and intelligent transportation market, has obtained using widely.
But in order to control manufacturing cost, most of cmos sensor does not possess the function of global shutter; But adopt the mode (rolling shutter) of the capable exposure of line scrolling in when exposure, make in this way, because time started and concluding time that every row makes public are all inequality; In practical application, have a strong impact on the quality of imaging, specifically, if the row time for exposure is short; Zone common time that does not just have exposure simultaneously between each row; At the synchronous light source of the external light source that needs the high brightness short time (like the gas photoflash lamp) when carrying out light filling, light source can not find suitable lighting constantly synchronously, will cause to have only in the image that fraction is capable can fill light; And if increase the row time for exposure, make to have public time for exposure zone between each row, can produce again owing to go the time for exposure and longly cause moving object seriously to be trailed, the problem that entire image can't be used.
Use mechanical shutter can solve and light problem constantly owing to row time for exposure weak point is difficult to hold external light source, yet, because mechanical shutter needs frequent open and close, cause shorten its useful life, also increased cost virtually.
Summary of the invention
In view of the foregoing; The object of the present invention is to provide a kind of CMOS to capture in the video camera in no global shutter; Through setting up a liquid crystal panel and it being controlled and can realize the method for CMOS candid photograph video camera global shutter function; Both can improve the image quality that CMOS captures video camera, can effectively control cost again.
For realizing above-mentioned purpose, the present invention adopts following technical scheme: a kind of CMOS of realization captures the method for video camera global shutter function, it is characterized in that, in the cmos sensor front that this CMOS captures video camera, the back of camera lens is provided with a liquid crystal panel;
The adjustment row time for exposure, when the exposure of first every trade was not finished as yet, last column had begun exposure;
And after first row begins exposure, open this liquid crystal panel and make it to convert pellucidity into by opaque state, last column began exposure when this liquid crystal panel converted pellucidity into;
When said last column begins to make public, light external light source;
When said external light source is closed, close liquid crystal panel and make it to convert into opaque state.
The invention has the advantages that:
The present invention sets up a liquid crystal panel through capturing in the video camera at CMOS; The row time for exposure of adjustment simultaneously; Open liquid crystal panel and external light source in the suitable moment; Make external light source to carry out light filling, and then can improve the quality of imaging, also can control cost effectively in the public time for exposure zone of each row.
Description of drawings
Fig. 1 is a method flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
Consideration from cost; Existing C MOS captures the function that video camera scarcely possesses global shutter, owing to adopt the mode of line scrolling to go exposure, and when needs photoflash lamp light filling; The row time for exposure is difficult to adjustment and holds; And in the practical application, all need carry out light filling under most of scenes with photoflash lamp, this just causes existing C MOS to capture the image quality of video camera and the demand that image effect is difficult to satisfy the user.
The present invention sets up a liquid crystal panel through capturing in the video camera at CMOS, simultaneously this liquid crystal panel is controlled to realize the function of video camera global shutter.Fig. 1 is method flow diagram of the present invention, and is as shown in the figure, and the concrete steps of method shown in the present are:
S10: in the cmos sensor front that CMOS captures video camera, the back of camera lens is provided with a liquid crystal panel;
S11: adjustment CMOS captures the capable time for exposure of video camera, and when the exposure of first every trade was not finished as yet, last column had begun exposure;
S12: after first row begins exposure, open this liquid crystal panel and make it to convert pellucidity into, and make that last column just began exposure when this liquid crystal panel converted pellucidity into by opaque state;
S13: when last column begins to make public, light external light source;
S14: when external light source is closed, close liquid crystal panel and make it to convert into opaque state.
Realization CMOS of the present invention captures the method for video camera global shutter function; Be utilized liquid crystal panel can through outside automatically controlled realization transparent and opaque between the characteristic of conversion fast; Before it was arranged at cmos sensor, the camera lens back was adjusted the capable time for exposure that CMOS captures video camera then; And at suitable moment unlatching liquid crystal panel and external light source; Make external light source in the public time for exposure zone of each row, to carry out light filling, and then can improve the quality of imaging, also can control cost effectively.
In specific embodiment of the present invention, the manufacturer and the model of liquid crystal panel do not had specific (special) requirements, only require that the reaction time is in 1ms.Also there is a large amount of TN type liquid crystal panels can reach this requirement in the market.
The above is preferred embodiment of the present invention and the know-why used thereof; For a person skilled in the art; Under the situation that does not deviate from the spirit and scope of the present invention; Any based on conspicuous changes such as the equivalent transformation on the technical scheme of the present invention basis, simple replacements, all belong within the protection range of the present invention.
Claims (1)
1. realize that CMOS captures the method for video camera global shutter function for one kind, it is characterized in that in the cmos sensor front that this CMOS captures video camera, the back of camera lens is provided with a liquid crystal panel;
The adjustment row time for exposure, when the exposure of first every trade was not finished as yet, last column had begun exposure;
And after first row begins exposure, open this liquid crystal panel and make it to convert pellucidity into by opaque state, last column began exposure when this liquid crystal panel converted pellucidity into;
When said last column begins to make public, light external light source;
When said external light source is closed, close liquid crystal panel and make it to convert into opaque state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102136187A CN102724406A (en) | 2012-06-26 | 2012-06-26 | Method for realizing global shutter function of complementary metal-oxide semiconductor (CMOS) snap-shot video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102136187A CN102724406A (en) | 2012-06-26 | 2012-06-26 | Method for realizing global shutter function of complementary metal-oxide semiconductor (CMOS) snap-shot video camera |
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| CN102724406A true CN102724406A (en) | 2012-10-10 |
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| CN2012102136187A Pending CN102724406A (en) | 2012-06-26 | 2012-06-26 | Method for realizing global shutter function of complementary metal-oxide semiconductor (CMOS) snap-shot video camera |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915812A (en) * | 2016-04-28 | 2016-08-31 | 努比亚技术有限公司 | Mobile terminal and exposing method and apparatus for the same |
| CN105959589A (en) * | 2016-05-30 | 2016-09-21 | 努比亚技术有限公司 | Mobile terminal and exposure method thereof |
| CN105959583A (en) * | 2016-04-28 | 2016-09-21 | 努比亚技术有限公司 | Mobile terminal and exposure method thereof |
| CN105979177A (en) * | 2016-04-29 | 2016-09-28 | 努比亚技术有限公司 | CMOS (complementary metal oxide semiconductor) device for realizing global exposure, terminal thereof and exposure control method |
| CN109165548A (en) * | 2018-07-06 | 2019-01-08 | 深圳虹识技术有限公司 | A kind of method and apparatus of light filling |
| CN111586264A (en) * | 2019-02-15 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and image acquisition method |
| CN114430464A (en) * | 2020-10-28 | 2022-05-03 | 华为技术有限公司 | Image processing method and device |
| CN115629505A (en) * | 2022-12-06 | 2023-01-20 | 开拓导航控制技术股份有限公司 | Liquid crystal regulation-based real-time inhibition method and system for overexposure in imaging process |
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| CN1782845A (en) * | 2004-11-30 | 2006-06-07 | 三星电机株式会社 | Image pick up module with optical element |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915812A (en) * | 2016-04-28 | 2016-08-31 | 努比亚技术有限公司 | Mobile terminal and exposing method and apparatus for the same |
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| WO2017185866A1 (en) * | 2016-04-28 | 2017-11-02 | 努比亚技术有限公司 | Mobile terminal, exposure method and device therefor, storage medium |
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| CN105959589A (en) * | 2016-05-30 | 2016-09-21 | 努比亚技术有限公司 | Mobile terminal and exposure method thereof |
| WO2017206658A1 (en) * | 2016-05-30 | 2017-12-07 | 努比亚技术有限公司 | Mobile terminal and method for exposure thereof, and computer storage medium |
| CN109165548A (en) * | 2018-07-06 | 2019-01-08 | 深圳虹识技术有限公司 | A kind of method and apparatus of light filling |
| CN111586264A (en) * | 2019-02-15 | 2020-08-25 | 杭州海康威视数字技术股份有限公司 | Image acquisition device and image acquisition method |
| CN114430464A (en) * | 2020-10-28 | 2022-05-03 | 华为技术有限公司 | Image processing method and device |
| CN115629505A (en) * | 2022-12-06 | 2023-01-20 | 开拓导航控制技术股份有限公司 | Liquid crystal regulation-based real-time inhibition method and system for overexposure in imaging process |
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Application publication date: 20121010 |