CN105744177A - Video exhibition stand light control method and system - Google Patents
Video exhibition stand light control method and system Download PDFInfo
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- CN105744177A CN105744177A CN201610089593.2A CN201610089593A CN105744177A CN 105744177 A CN105744177 A CN 105744177A CN 201610089593 A CN201610089593 A CN 201610089593A CN 105744177 A CN105744177 A CN 105744177A
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- 230000000052 comparative effect Effects 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 6
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- 239000013589 supplement Substances 0.000 abstract description 3
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- 238000005286 illumination Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/745—Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
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Abstract
The invention provides a light control method and a light control system for a video exhibition stand, wherein the method comprises the steps of obtaining an image picture of the video exhibition stand, judging a key frame picture, dividing the key frame picture into a plurality of regions, calculating the brightness average value of each region, comparing the brightness average value of each region with a set threshold value, and adjusting a light supplement lamp in the corresponding direction on the video exhibition stand according to the comparison result, so that the problems of uneven picture brightness, yin and yang pictures, overexposure of the pictures, influence on picture effect, flicker of the pictures and the like are avoided, and the picture display effect of the video exhibition stand is improved.
Description
Technical field
The present invention relates to non-support cable field, particularly a kind of video presenter lamp light control method and system thereof.
Background technology
In the application scenarios of conventional video exhibition booth, LED light supplement lamp simply provides merely illumination functions, and picture is carried out light filling.But simple illumination easily there is problems in that picture brightness is uneven, cause and the phenomenon of overexposure occur and affect picture effect etc. in the middle of negative and positive picture, paper material for shooting, common video presenter is additionally subjected to the impact of environment light, cause that picture brightness jumps, cause the flicker of whole picture, therefore, the picture quality of acquisition is not ideal enough.
Summary of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of video presenter lamp light control method and system thereof, it is possible to make the picture brightness of video presenter evenly.
The video presenter lamp light control method of the present invention, technical scheme is as follows, including:
Obtain the image frame of video presenter；
Judge whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region；
The average brightness in each region is compared with setting threshold value, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
The video presenter lamp light control system of the present invention, including:
Image collection module, for obtaining the image frame of video presenter；
Region divides module, is used for judging whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region；
Light adjusting module, for being compared with setting threshold value by the average brightness in each region, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
The video presenter lamp light control method of the present invention and system thereof, by obtaining the image frame of video presenter, judge key frame picture, described key frame picture is divided into some regions, calculate the average brightness in each region, and the average brightness in each region is compared with setting threshold value, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted, thus avoiding that picture brightness is uneven, negative and positive picture, picture overexposure, affecting the problem such as picture effect and film flicker, therefore improve video presenter and show the effect of picture.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the video presenter lamp light control method of an embodiment；
Fig. 2 is the schematic flow sheet of the video presenter lamp light control method of a relatively good implementation；
Fig. 3 is the structural representation of the video presenter lamp light control system of an embodiment.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Refer to the schematic flow sheet of the video presenter lamp light control method of an embodiment in Fig. 1, including step S101 to step S103:
S101, obtains the image frame of video presenter.
Before step S101, all directions at video presenter are arranged can controlled light compensating lamp, in order to follow-up the light compensating lamp of correspondence direction on video presenter is adjusted.
The image frame of described acquisition video presenter can be realized by following preferred mode: shoots the picture of video on exhibition booth by the photographic head of video presenter upper end, thus improving the convenience obtaining video presenter image frame.
S102, it is judged that whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region.
In step S102, it is judged that whether the brightness value of the pixel that described image frame comprises reaches setting value, if so, determine that this image frame is key frame picture.Judge that key frame picture amount of calculation is little by which, it is judged that efficiency is high.
Further, it is also possible to determine key frame picture in the following manner: using first image frame obtaining as first key frame picture；The image frame currently obtained and a upper key frame picture are compared, if the absolute difference of the pixel brightness value of two pictures exceedes setting amplitude, it is determined that current shooting to image frame be new key frame picture.Key frame picture is judged, it is judged that precision is high by which.
Further, the average brightness in each region of described calculating includes: obtain the rgb value of each area pixel point, obtains the gray value of each area pixel point according to described rgb value, default conversion formula；Follow-up light compensating lamp adjustment calculates the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region, so that more accurately for the regional of image frame, can improve the degree of accuracy that light compensating lamp adjusts.
Specifically, obtaining the rgb value of each area pixel point, each pixel comprises the value between 30 to 255, represents R, G, B three primary colors respectively, is combined into different colors according to these three value；According to described rgb value and default conversion formula grey=0.3*R+0.59G+0.11B, pixel value is converted to gray value grey, the rgb value in pixel is replaced according to the grey value obtained, calculate the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region, judge the lightness of current picture according to average brightness.
S103, compares the average brightness in each region with setting threshold value, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
Wherein, described light compensating lamp is LED, thus reducing hardware cost.
Further, if the average brightness in certain region is less than setting threshold value, then the light compensating lamp of this region correspondence direction is lightened or opens；If the average brightness in certain region is more than setting threshold value, then the light compensating lamp of this region correspondence direction is dimmed or extinguish.This step avoids that picture brightness is uneven, negative and positive picture, picture overexposure, affect the problem such as picture effect and film flicker, reach effect more preferably.
From the video presenter lamp light control method of above-described embodiment, by obtaining the image frame of video presenter, judge key frame picture, described key frame picture is divided into some regions, calculate the average brightness in each region, and the average brightness in each region is compared with setting threshold value, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted, thus avoiding that picture brightness is uneven, negative and positive picture, picture overexposure, affecting the problem such as picture effect and film flicker, therefore improve video presenter and show the effect of picture.
It is below a relatively good implementation of the video presenter lamp light control method of the present invention, consults the schematic flow sheet of the video presenter lamp light control method of shown in Fig. 2 a relatively good implementation, including step S201 to step S209:
S201, starts.
S202, obtains camera picture.The picture of video on exhibition booth is shot by the photographic head of video presenter upper end.
S203, it may be judged whether have camera picture.By obtaining the pixel of image frame, if there is pixel and the brightness value of pixel reaches predetermined number, then judge that current output picture is normal, carry out next step, otherwise, it is judged that current output picture is abnormal, return step S202.
S204, obtains key frame.Using first image frame photographing as first key frame picture；By current shooting to image frame and a upper key frame picture compare, if the absolute difference of the pixel brightness value of two pictures exceedes setting amplitude, then judge that current picture there occurs bigger change compared with a upper key frame, and with current picture for new key frame picture.
S205, it may be judged whether obtain key frame, if so, carries out next step, otherwise, returns step S202.
S206, analysis of key frame picture luminous distribution, described key frame picture is divided into some regions, calculates the average brightness in each region.The data of picture are a series of pixel set, and each pixel comprises the value between 30 to 255, represent R, G, B three primary colors respectively, are combined into different colors according to these three value；According to described rgb value and default conversion formula grey=0.3*R+0.59G+0.11B, pixel value is converted to gray value grey, the rgb value in pixel is replaced according to the grey value obtained, calculate the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region, judge the lightness of current picture according to average brightness.
S207, it may be judged whether carry out LED light filling.If the average brightness in certain region is less than setting threshold value, then needs to carry out LED light filling, carry out next step；If the lightness in certain region is equal to setting threshold value, then it is made without LED light filling, returns step S204.
S208, regulates the state of all directions LED.Such as, need to carry out LED light filling if previous step determined, then the light compensating lamp of this region correspondence direction is opened or lightened.Wherein, following steps can be passed through and regulate on off state or the light levels of LED: send instruction, the current state of request LED to hardware, accept the hardware status information returned, carrying out data point reuse according to current state, send to hardware and adjust data, hardware returns and adjusts result.
S209, terminates.
In above-mentioned relatively good implementation, arranging at different directions at video presenter can controlled LED light supplement lamp, photographic head obtains video pictures in upper end, exhibition booth, real-time image frame is obtained by photographic head, judge key frame picture, described key frame picture is divided into some regions, calculate the average brightness in each region, and the average brightness in each region is compared with setting threshold value, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted, control on off state or the light levels of the LED in respective regions or neighbouring direction, complete light filling, therefore, solve the problem that picture brightness is uneven, improve video presenter and show the effect of picture.
By this method, the light compensating lamp of correspondence direction on video presenter is adjusted, the negative and positive picture, the picture overexposure that produce in traditional method can also be avoided, affect the problem such as picture effect and film flicker, thus improving video presenter further to show the effect of picture.
The present invention also provides for a kind of video presenter lamp light control system, as it is shown on figure 3, include image collection module 301, region division module 302 and light adjusting module 303.
Described image collection module 301 is for obtaining the image frame of video presenter；Described region divides module 302 and is used for judging whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region；And described light adjusting module 303 is for comparing the average brightness in each region with setting threshold value, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
From the video presenter lamp light control system of above-described embodiment, by obtaining the image frame of video presenter, judge key frame picture, described key frame picture is divided into some regions, calculate the average brightness in each region, and the average brightness in each region is compared with setting threshold value, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted, thus avoiding that picture brightness is uneven, negative and positive picture, picture overexposure, affecting the problem such as picture effect and film flicker, therefore improve video presenter and show the effect of picture.
Wherein in an embodiment, described image collection module 301 includes Image Acquisition submodule, for shooting the picture of video on exhibition booth by the photographic head of video presenter upper end, thus improving the convenience of shooting video presenter image frame；Described image collection module 301 also includes arranging submodule, can controlled light compensating lamp for arranging in all directions of video presenter, in order to follow-up the light compensating lamp of correspondence direction on video presenter is adjusted.
Wherein in an embodiment, described region divides module 302 and also includes brightness calculation submodule, for obtaining the rgb value of each area pixel point, obtains the gray value of each area pixel point according to described rgb value, default conversion formula；Follow-up light compensating lamp adjustment calculates the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region, so that more accurately for the regional of image frame, can improve the degree of accuracy that light compensating lamp adjusts.
Wherein in an embodiment, described region divides module 302 and includes the first decision sub-module, and whether the brightness value for judging pixel that described image frame comprises reaches setting value, if so, determines that this image frame is key frame picture.By described first decision sub-module, this embodiment judges that key frame picture amount of calculation is little, it is judged that efficiency is high.
Wherein in an embodiment, described region divides module 302 and also includes the second decision sub-module, for first image frame will obtaining as first key frame picture；The image frame currently obtained and a upper key frame picture are compared, if the absolute difference of the pixel brightness value of two pictures exceedes setting amplitude, it is determined that current shooting to image frame be new key frame picture.This embodiment is analyzed submodule by described second and is judged key frame picture, it is judged that precision is high.
Wherein in an embodiment, described light adjusting module 303 include light adjust submodule, if for certain region average brightness less than set threshold value, then the light compensating lamp of this region correspondence direction is lightened or opens；If the average brightness in certain region is more than setting threshold value, then the light compensating lamp of this region correspondence direction is dimmed or extinguish.
Wherein, described light compensating lamp is LED, thus reducing hardware cost.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. video presenter lamp light control method, it is characterised in that comprise the steps:
Obtain the image frame of video presenter；
Judge whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region；
The average brightness in each region is compared with setting threshold value, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
2. video presenter lamp light control method according to claim 1, it is characterised in that the average brightness in each region of described calculating, including:
Obtain the rgb value of each area pixel point, obtain the gray value of each area pixel point according to described rgb value, default conversion formula；
Calculate the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region.
3. video presenter lamp light control method according to claim 1, it is characterised in that described according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted, including:
If the average brightness in certain region is less than setting threshold value, then the light compensating lamp of this region correspondence direction is lightened or opens；
If the average brightness in certain region is more than setting threshold value, then the light compensating lamp of this region correspondence direction is dimmed or extinguish.
4. video presenter lamp light control method according to claim 1, it is characterised in that described judge whether described image frame is key frame picture, including:
Judge whether the brightness value of the pixel that described image frame comprises reaches setting value, if so, determine that this image frame is key frame picture.
5. video presenter lamp light control method according to claim 1, it is characterised in that described judge whether described image frame is key frame picture, including:
Using first image frame obtaining as first key frame picture；
The image frame currently obtained and a upper key frame picture are compared, if the absolute difference of the pixel brightness value of two pictures exceedes setting amplitude, it is determined that current shooting to image frame be new key frame picture.
6. video presenter lamp light control method according to claim 1, it is characterised in that the image frame of described acquisition video presenter, including:
The picture of video on exhibition booth is shot by the photographic head of video presenter upper end；
Before the image frame of described acquisition video presenter, including:
All directions at video presenter are arranged can controlled light compensating lamp.
7. video presenter lamp light control system, it is characterised in that including:
Image collection module, for obtaining the image frame of video presenter；
Region divides module, is used for judging whether described image frame is key frame picture, if so, described key frame picture is divided into some regions, calculates the average brightness in each region；
Light adjusting module, for being compared with setting threshold value by the average brightness in each region, obtains comparative result, according to comparative result, the light compensating lamp of correspondence direction on video presenter is adjusted.
8. video presenter lamp light control system according to claim 7, it is characterised in that described region divides module and also includes:
Brightness calculation submodule, for obtaining the rgb value of each area pixel point, obtains the gray value of each area pixel point according to described rgb value, default conversion formula；Calculate the meansigma methods of the gray value of each area pixel point, it can be used as the average brightness in described region.
9. video presenter lamp light control system according to claim 7, it is characterised in that described region divides module and includes:
First decision sub-module, whether the brightness value for judging pixel that described image frame comprises reaches setting value, if so, determines that this image frame is key frame picture.
10. video presenter lamp light control system according to claim 7, it is characterised in that described region divides module and also includes:
Second decision sub-module, for first image frame will obtaining as first key frame picture；The image frame currently obtained and a upper key frame picture are compared, if the absolute difference of the pixel brightness value of two pictures exceedes setting amplitude, it is determined that current shooting to image frame be new key frame picture.
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| CN201610089593.2A CN105744177A (en) | 2016-02-17 | 2016-02-17 | Video exhibition stand light control method and system |
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| CN108810509A (en) * | 2018-07-06 | 2018-11-13 | 北京中安未来科技有限公司 | A kind of image color correction method and device |
| CN110248141A (en) * | 2019-06-10 | 2019-09-17 | 广州视源电子科技股份有限公司 | Video image brightness adjusting method, device, equipment and readable storage medium |
| CN110336954A (en) * | 2019-07-11 | 2019-10-15 | 创新奇智(重庆)科技有限公司 | Automatic light-supplementing adjusting method, system and storage medium |
| CN111083388A (en) * | 2019-12-26 | 2020-04-28 | 浙江大华技术股份有限公司 | Light supplement lamp control method and device, electronic equipment and storage medium |
| CN111935388A (en) * | 2020-09-22 | 2020-11-13 | Oppo广东移动通信有限公司 | Flash lamp control method of mobile terminal, storage medium and equipment |
| CN114158160A (en) * | 2021-11-26 | 2022-03-08 | 杭州当虹科技股份有限公司 | Immersive atmosphere lamp system based on video content analysis |
| CN114915705A (en) * | 2021-02-09 | 2022-08-16 | 英业达科技有限公司 | Light supplement method and computer system thereof |
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| CN114915705A (en) * | 2021-02-09 | 2022-08-16 | 英业达科技有限公司 | Light supplement method and computer system thereof |
| CN114158160A (en) * | 2021-11-26 | 2022-03-08 | 杭州当虹科技股份有限公司 | Immersive atmosphere lamp system based on video content analysis |
| CN114158160B (en) * | 2021-11-26 | 2024-03-29 | 杭州当虹科技股份有限公司 | Immersive atmosphere lamp system based on video content analysis |
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