CN106998422A - A kind of automatic identification is taken on the sly the apparatus and method of camera lens - Google Patents
A kind of automatic identification is taken on the sly the apparatus and method of camera lens Download PDFInfo
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- CN106998422A CN106998422A CN201610048999.6A CN201610048999A CN106998422A CN 106998422 A CN106998422 A CN 106998422A CN 201610048999 A CN201610048999 A CN 201610048999A CN 106998422 A CN106998422 A CN 106998422A
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- optical
- image
- filter
- infrared light
- camera lens
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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
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
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Abstract
Taken on the sly the invention discloses a kind of automatic identification the apparatus and method of camera lens, specifically, including lighting source, optical-filter switcher, image pick-up device, image processor and control circuit, wherein described lighting source transmitting visible ray and Infrared irradiation region to be checked, the optical-filter switcher can switch optical filter in turn to the image pick-up device front end, the image pick-up device is set to obtain visible ray and infrared light image, described image processor is compared with a threshold value the luminance difference of infrared light image and visible images, determine whether there is camera lens of taking on the sly, the control circuit sends control instruction according to from the program deposited to above-mentioned part.By apparatus and method of the present invention, can realize it is unattended, recognize illegal shooting behavior in real time so that effectively protection people privacy and business secret safety.
Description
Technical field
The present invention relates to information security field, taken on the sly the apparatus and method of camera lens specifically, being related to a kind of automatic identification.
Background technology
With the development of semiconductor image sensor, shooting and camera function are equipped with increasing electronic product, while the life and amusement of people is enriched, the danger that individual privacy and business secret face leakage more and more is also resulted in.Especially in secure locations, it is necessary to which method easily and effectively prevents illegal behavior of taking on the sly.
The present commonplace detecting to camera of taking on the sly is all the method using strong illumination descendant's eye examination reflective spot, the presence of fixed lens in certain limit can only be checked, such as hotel room, concealed camera of dressing cubicle etc., and need participating in the overall process for people, for interim, the person of taking on the sly of random movement does not work.Therefore, be badly in need of in the industry it is a kind of can realize the technology of automatic identification, taken on the sly behavior so that detecting can be continued at any time.
During the piracy of taking on the sly of confrontation movie theatre, people have also been developed a kind of technology monitored automatically, according to document " IR Hiding: Method to
Prevent Re-recording Screen Image Built in Short Wavelength Pass Filter
Detection Method Using Specular Reflection. " Takayuki Yamada etc., International Conference
on Digital-forensics & Watermarking,2011,7128:Disclosed in 111-125, launch infrared light to auditorium using infrared transmitter behind cinema projection curtain, then the infrared light image reflected is shot with an infrared camera, using pick-up lens it is high to infrared reflectivity the characteristics of detect the behavior of taking on the sly, and can allow software Auto-Sensing using image processing techniques.However, due to many objects, such as glass, mirror, metal etc. may all have higher reflectivity to infrared light, so the accuracy rate of this method is not high, easily produce wrong report.
The content of the invention
The present invention is based on following technical principle：Pick-up lens is in order to make full use of light, and camera lens surface needs to plate the anti-reflection film of multilayer, to increase the transmissivity of visible ray, reduces reflectivity, this causes camera lens that dark brightness is presented under radiation of visible light environment.Simultaneously, because the photo-sensitive cell that modern digital images product uses charge coupled cell (CCD) or cmos device (CMOS), visible ray can not only be sensed, also near infrared light of the wavelength within 1100nm can be sensed, interference in order to avoid the infrared light in environment to imaging, people can also install the optical filter of one piece of filtering infrared light in camera lens, or plate on camera lens the film of filtering infrared light.This optical filter or filter coating are very high to the reflectivity of infrared light, therefore under the irradiation of infrared light, brilliant white will be presented in the pick-up lens center photographed with the camera of only sensing infrared light.As shown in figure 1, visible images 1001 and infrared light image 1002 are continuously shot to the scene containing pick-up lens, wherein, it is seen that the optical center 1003 of light image is dark, and the optical center 1004 of infrared light image is brighter.This very big luminance contrast, is exactly the key character that pick-up lens has, and for other objects, will not typically have so big gap, the particularly wavelength of feux rouges and near infrared light relatively to the reflectivity of visible ray and infrared light.Using the method for image procossing, this luminance contrast is analyzed, one luminance difference threshold value of setting is used as criterion, it is possible to allow software to automatically identify camera lens.The device of the execution above method is arranged on the occasion of need for confidentiality, possible direction of taking on the sly is directed at and carries out continual realtime graphic seizure and analysis, when the person of taking on the sly lifts camera, camera lens therein will be identified by device immediately.
The apparatus and method of camera lens it is an object of the present invention to provide a kind of automatic identification is taken on the sly, to find the illegal safety for shooting behavior, protecting the information such as individual privacy or business secret in time.
To achieve the above object, the present invention provides the device that a kind of automatic identification takes camera lens on the sly, including lighting source, optical-filter switcher, image pick-up device, image processor and control circuit, the lighting source includes VISIBLE LIGHT EMISSION element and infrared light emission element, visible ray of the difference launch wavelength in 380nm to 760nm wave bands, with near infrared light of the wavelength in 760nm to 1100nm wave bands, the optical-filter switcher includes one group of optical filter, wherein at least includes a transmissive infrared light, filter the infrared transmission optical filter of visible ray, it is preferred that, also include a transmissive visible ray, the visible transmission optical filter of filtering infrared light, by a mechanical device, optical filter thereon can be switched to the camera lens front end for being directed at the image pick-up device by the optical-filter switcher, so that image pick-up device obtains the image under corresponding transmission light irradiation, the analysis for the image that described image computing device is exported to image pick-up device and evaluation work, and result of determination is fed back into control circuit, the control circuit sends control instruction according to being stored in interior program to above-mentioned each part.
In addition, to achieve the above object, the present invention also provides a kind of method that automatic identification takes camera lens on the sly, by described device, including：
Start lighting source and irradiate region to be checked；
Control optical-filter switcher switches optical filter to image pick-up device front end in turn, obtains visible images and infrared light image；
It will be seen that light image and infrared light image are output to memory storage；
Image processor reads visible images and infrared light image, the brightness number matrix of the brightness number matrix of infrared light image and visible images is subtracted each other with matrix, obtained difference data is compared with a threshold value；
A region is judged whether, the difference data of wherein all pixels is all higher than threshold value, if it is present judging there is camera lens of taking on the sly, send alarm, otherwise, repeat said process.
The beneficial effects of the invention are as follows：By described device and method, the presence for camera lens of taking on the sly can be automatically identified with software, and send and warn, thus prevent in time it is illegal shoot behavior, retrieve a loss.
Brief description of the drawings
Fig. 1 shows the comparison diagram of the visible images containing pick-up lens and infrared light image；
Fig. 2 shows the embodiment schematic diagram according to apparatus of the present invention；
Fig. 3 shows Fig. 2 lighting source schematic diagram；
Fig. 4 shows Fig. 2 optical-filter switcher first embodiment schematic diagram；
Fig. 5 shows Fig. 2 optical-filter switcher second embodiment schematic diagram；
Fig. 6 shows Fig. 2 optical-filter switcher 3rd embodiment schematic diagram；
Fig. 7 shows the embodiment schematic diagram according to the inventive method.
Embodiment
The present invention is described in detail with reference to embodiment and accompanying drawing.
A kind of automatic identification that the present invention is provided take on the sly camera lens device embodiment it is as shown in Figure 2, the light beam 7 that lighting source 1 is sent is irradiated on region 2 to be checked, its reflected light enters image pick-up device 4 by optical-filter switcher 3, is changed into electric signal and be output in view data form in image processor 5 by the image pick-up device.Wherein lighting source 1, optical-filter switcher 3, image pick-up device 4 and image processor 5 are electrically connected with control circuit 6, and preferably wired connection.Image pick-up device 4 includes imaging lens and CCD or CMOS photo-sensitive cells, by image incoming light and can be converted into view data, represents the brightness size of each pixel in the view data with numerical value, and according to the data structure of location of pixels composition matrix.Image processor 5 it is preferred also include a memory, the view data for storing the output of image pick-up device 4, and also include a graphics calculations processor (GPU) judges whether camera lens of taking on the sly for calculating view data, and according to result of calculation.Control circuit 6 to include controller and memory, control instruction to former components can be sent according to the program in being stored in.
Lighting source 1 shown in Fig. 3 includes VISIBLE LIGHT EMISSION element 101 and infrared light emission element 102, and visible ray and infrared light are sent respectively, and region to be checked can be completely covered in two kinds of light beams.Wherein, in order to allow the photo-sensitive cell of image pick-up device to sense light, the infrared light sent should include near infrared light wavelength between 760nm to 1100nm.
Optical-filter switcher 3 includes optical filter and a mechanical device, can switch optical filter in turn to the front end of image pick-up device 4.The mechanical device can use motor or electromagnetism or other power drives, and it has following preferred embodiment.
Fig. 4 shows the first embodiment of optical-filter switcher 3, including rotating disk 300, filter set 301, rotating shaft 302.Wherein filter set 301 at least includes an infra-red transmitting filter, it is preferred that also including a visible transmission optical filter.Infra-red transmitting filter refers to infrared light, and the optical filter that visible ray is filtered, it is seen that light transmission optical filter refers to visible light-transmissive, and the optical filter that infrared light is filtered.By a rotating shaft 302 driven by motor, the optical filter being installed on it can be in turn switched to before the camera lens 303 of image pick-up device, image pick-up device is obtained visible ray and infrared light image respectively with rotary turnplate 300.
Fig. 5 shows the second embodiment of optical-filter switcher 3, including filter set 301, rotating shaft 302, drive gear 304, movable plate 305.Pass through a rotating shaft 302 driven by motor, can be with rotary drive gear 304, and pass through the engagement of the rack on drive gear and movable plate 305, movable plate 305 is driven to do lateral displacement, optical filter can be in turn switched to before the camera lens 303 of image pick-up device, so that image pick-up device obtains visible ray and infrared light image respectively.
Fig. 6 shows the 3rd embodiment of optical-filter switcher 3, including filter set 301, rotary shaft 306, rotor plate 307, sliding groove 308, swing rod 309, electromagnet 310.Rotor plate 307 can revolve around it axle 306 and rotate, and a sliding groove 308 is provided with thereon, is connected with one end of swing rod 309.The other end of swing rod 309 can be swung by the magneticaction of electromagnet 310, when swing rod is swung, it is possible to promote rotor plate 307 to rotate.And optical filter 301 is installed on rotor plate 307, so that optical filter is switched to before the camera lens 303 of image pick-up device in turn, image pick-up device is obtained visible ray and infrared light image respectively.
The present invention also provides a kind of method that automatic identification by means of said apparatus takes camera lens on the sly, and Fig. 7 shows the embodiment schematic diagram of the inventive method, comprised the following steps：
Step S101, starts lighting source, irradiates region to be checked；
Step S102, controls optical-filter switcher, switches optical filter in turn into the front end light path of image pick-up device, image pick-up device is obtained visible ray and infrared light image respectively；
Step S103, image pick-up device will be seen that light image and infrared light image are output in memory and keep in that the memory is preferably included among image processor；
Step S104, image processor, which is read, is stored in interior view data, then, the brightness that image is completely converted into gray level image, pixel is represented with gray value preferably.Infrared light image data are subtracted each other with visible images data with matrix, obtained difference data is compared with a threshold value.Infrared luminous intensity and the difference of visual intensity that the threshold value should usually be sent according to lighting source, and in addition to camera lens general object to infrared light and the difference of visible reflectance brightness, reasonably set, it is ensured that only pick-up lens is more than the threshold value to infrared light and the difference of visible reflectance brightness；
Step S105, judges whether a region, and the difference data of wherein all pixels is all higher than threshold value, if it is present judging there is camera lens of taking on the sly, into step S106, sends alarm, its mode includes but is not limited to：Loudspeaker sounding is warned, and/or notifies specified director with SMS, and/or retains the person's of taking on the sly photo etc..If there is no the region, then camera lens of not taking on the sly is judged, the repeating said steps since step S102.
Usually; in order to improve recognition accuracy; reduce wrong report; image processor can carry out noise reduction before view data is calculated to image; and/or enhancing etc. pretreatment; in the step of these preprocessing process may be embodied in the present embodiment, a step can also be individually composed, it does not influence the scope of patent protection of the present invention.
It these are only the preferred embodiments of the present invention; it is not intended to limit the scope of the invention; equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made; or other related technical fields are directly or indirectly used in, it is included within the scope of the present invention.
Claims (7)
- The device of camera lens 1. a kind of automatic identification is taken on the sly, including lighting source, optical-filter switcher, image pick-up device, image processor and control circuit, it is characterized in that, the lighting source includes VISIBLE LIGHT EMISSION element and infrared light emission element, the optical-filter switcher comprises at least an infrared transmission optical filter, and the optical-filter switcher is located at the front end of the image pick-up device.
- 2. according to claim 1, it is characterised in that visible ray of the VISIBLE LIGHT EMISSION element launch wavelength in 380nm to 760nm wave bands, near infrared light of the infrared light emission element launch wavelength in 760nm to 1100nm wave bands.
- 3. according to claim 1, it is characterised in that the optical-filter switcher includes one group of optical filter, wherein at least includes an infrared transmission optical filter, and the infrared transmission optical filter refers to transmissive infrared light, filters the optical filter of visible ray.
- 4. according to claim 1, it is characterized in that, the optical-filter switcher also includes a mechanical device, optical filter on the optical-filter switcher can be switched to the camera lens front end for being directed at the image pick-up device by the mechanical device, so that image pick-up device obtains the image under corresponding transmission light irradiation, then switch the camera lens front end that optical filter leaves the image pick-up device again.
- 5. according to claim 1 or 4, it is characterised in that the optical-filter switcher has short switching time, its time is less than 0.1 second.
- 6. according to claim 1, it is characterised in that the image pick-up device includes imaging lens and photo-sensitive cell, and the photo-sensitive cell is charge coupled cell or cmos device.
- A kind of method of camera lens 7. automatic identification is taken on the sly, it is characterised in that methods described includes：Start lighting source and irradiate region to be checked；Control optical-filter switcher switches optical filter to image pick-up device front end in turn, and visible images and infrared light image are obtained respectively；It will be seen that light image and infrared light image are output to memory storage；Image processor reads visible images and infrared light image, the brightness number matrix of the brightness number matrix of infrared light image and visible images is subtracted each other with matrix, obtained difference data is compared with a threshold value；A region is judged whether, the difference data of wherein all pixels is all higher than threshold value, if it is present judging there is camera lens of taking on the sly, send alarm, otherwise, repeat said process.
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| CN201610048999.6A CN106998422A (en) | 2016-01-26 | 2016-01-26 | A kind of automatic identification is taken on the sly the apparatus and method of camera lens |
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| CN201610048999.6A CN106998422A (en) | 2016-01-26 | 2016-01-26 | A kind of automatic identification is taken on the sly the apparatus and method of camera lens |
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| CN109271814A (en) * | 2018-10-09 | 2019-01-25 | 裕利年电子南通有限公司 | Anti- take pictures display system and anti-photographic method based on computer vision |
| CN109388532A (en) * | 2018-09-26 | 2019-02-26 | Oppo广东移动通信有限公司 | Test method, device, electronic equipment and computer-readable storage medium |
| CN109544535A (en) * | 2018-11-26 | 2019-03-29 | 马杰 | It is a kind of that camera detection method and system are pried through based on infrared cutoff filter optical filtration characteristic |
| EP3502959A1 (en) * | 2017-12-21 | 2019-06-26 | Samsung Electronics Co., Ltd. | Apparatus and method for detecting reflection |
| CN109976837A (en) * | 2019-03-29 | 2019-07-05 | 联想(北京)有限公司 | The information processing method and electronic equipment of a kind of electronic equipment |
| CN110031852A (en) * | 2019-04-17 | 2019-07-19 | 深圳市安特保电子商务集团有限公司 | It is a kind of for detecting the method, apparatus and storage device of equipment of taking on the sly |
| CN110134565A (en) * | 2019-04-12 | 2019-08-16 | 重庆科芮智能科技有限公司 | Environment light detection method and device |
| CN110488371A (en) * | 2019-08-06 | 2019-11-22 | 软通智慧科技有限公司 | Hiding camera based on infrared light detection finds method, device and equipment |
| CN110572618A (en) * | 2019-09-24 | 2019-12-13 | 增长引擎（北京）信息技术有限公司 | Illegal photographing behavior monitoring method, device and system |
| CN111200781A (en) * | 2018-11-19 | 2020-05-26 | 林桦 | Anti-photographing method and system based on computer vision and radio direction finding positioning |
| CN111935403A (en) * | 2020-08-14 | 2020-11-13 | 昆山同日工业自动化有限公司 | Confidential area violation photographing monitoring system based on 5G network |
| CN112525495A (en) * | 2020-11-25 | 2021-03-19 | 中国人民解放军陆军工程大学 | Active detection module design for resisting optical hidden observation |
| CN113223036A (en) * | 2020-01-21 | 2021-08-06 | 李华 | Electronic equipment field positioning system |
| CN113542573A (en) * | 2020-04-14 | 2021-10-22 | 华为技术有限公司 | Photographing method and electronic equipment |
| CN114339184A (en) * | 2022-03-07 | 2022-04-12 | 南京睿辰欣创网络科技股份有限公司 | Multifunctional projection and identification equipment |
| CN114325728A (en) * | 2021-12-30 | 2022-04-12 | 无锡睿勤科技有限公司 | Camera detection method and device |
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| EP3502959A1 (en) * | 2017-12-21 | 2019-06-26 | Samsung Electronics Co., Ltd. | Apparatus and method for detecting reflection |
| CN109951698A (en) * | 2017-12-21 | 2019-06-28 | 三星电子株式会社 | For detecting the device and method of reflection |
| CN109388532B (en) * | 2018-09-26 | 2022-10-28 | Oppo广东移动通信有限公司 | Test method, test device, electronic equipment and computer readable storage medium |
| CN109388532A (en) * | 2018-09-26 | 2019-02-26 | Oppo广东移动通信有限公司 | Test method, device, electronic equipment and computer-readable storage medium |
| CN109271814A (en) * | 2018-10-09 | 2019-01-25 | 裕利年电子南通有限公司 | Anti- take pictures display system and anti-photographic method based on computer vision |
| WO2020073739A1 (en) * | 2018-10-09 | 2020-04-16 | 林桦 | Computer-vision-based anti-photographing display system and anti-photographing method |
| CN111200781A (en) * | 2018-11-19 | 2020-05-26 | 林桦 | Anti-photographing method and system based on computer vision and radio direction finding positioning |
| CN111200781B (en) * | 2018-11-19 | 2021-09-14 | 林桦 | Anti-photographing method and system based on computer vision and radio direction finding positioning |
| CN109544535A (en) * | 2018-11-26 | 2019-03-29 | 马杰 | It is a kind of that camera detection method and system are pried through based on infrared cutoff filter optical filtration characteristic |
| CN109976837A (en) * | 2019-03-29 | 2019-07-05 | 联想(北京)有限公司 | The information processing method and electronic equipment of a kind of electronic equipment |
| CN110134565A (en) * | 2019-04-12 | 2019-08-16 | 重庆科芮智能科技有限公司 | Environment light detection method and device |
| CN110031852A (en) * | 2019-04-17 | 2019-07-19 | 深圳市安特保电子商务集团有限公司 | It is a kind of for detecting the method, apparatus and storage device of equipment of taking on the sly |
| CN110488371A (en) * | 2019-08-06 | 2019-11-22 | 软通智慧科技有限公司 | Hiding camera based on infrared light detection finds method, device and equipment |
| CN110572618A (en) * | 2019-09-24 | 2019-12-13 | 增长引擎（北京）信息技术有限公司 | Illegal photographing behavior monitoring method, device and system |
| CN110572618B (en) * | 2019-09-24 | 2021-03-16 | 增长引擎（北京）信息技术有限公司 | Illegal photographing behavior monitoring method, device and system |
| CN113223036A (en) * | 2020-01-21 | 2021-08-06 | 李华 | Electronic equipment field positioning system |
| CN113542573A (en) * | 2020-04-14 | 2021-10-22 | 华为技术有限公司 | Photographing method and electronic equipment |
| CN111935403A (en) * | 2020-08-14 | 2020-11-13 | 昆山同日工业自动化有限公司 | Confidential area violation photographing monitoring system based on 5G network |
| CN112525495B (en) * | 2020-11-25 | 2022-05-27 | 中国人民解放军陆军工程大学 | Active detection module design for resisting optical hidden observation |
| CN112525495A (en) * | 2020-11-25 | 2021-03-19 | 中国人民解放军陆军工程大学 | Active detection module design for resisting optical hidden observation |
| CN114325728A (en) * | 2021-12-30 | 2022-04-12 | 无锡睿勤科技有限公司 | Camera detection method and device |
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Application publication date: 20170801 |