CN111783563A - Double-spectrum-based face snapshot and monitoring method, system and equipment - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000001228 spectrum Methods 0.000 title claims abstract description 42
- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 23
- 238000001429 visible spectrum Methods 0.000 claims abstract description 23
- 230000009977 dual effect Effects 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 10
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/172—Classification, e.g. identification
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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
- H04N23/45—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
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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
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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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
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
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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
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
Abstract
The invention provides a face snapshot and monitoring method based on double spectrums, a system, equipment and a storage medium, comprising the following steps: acquiring image data of infrared spectrum and visible spectrum; fusing the image data to obtain optimal image data; generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face; and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture. The double-spectrum camera has the same effect as a common camera under the condition of sufficient light source, but can still shoot out colored pictures under the condition of insufficient light source or no light, can also effectively reduce light pollution, improves the face image quality at night, does not need to carry out highlight compensation when capturing a snapshot on the road, causes the condition that pedestrians or vehicles generate dazzling and dazzling, increases the experience effect of customer use, and improves the satisfaction degree.
Description
Technical Field
The invention belongs to a security system, relates to a monitoring method and equipment, and particularly relates to a double-spectrum-based face snapshot and monitoring method, system, equipment and storage medium.
Background
The traditional color camera only collects and utilizes information of visible light wave bands, and the color image effect is seriously degraded along with the reduction of the visible light intensity or the blockage of scene information in low-light, haze and other scenes; in these scenes, a clear infrared image with a high signal-to-noise ratio can be obtained through proper exposure control. On the other hand, infrared images only have gray information but no color information, and moreover, the effect of capturing human face pictures is poor due to the influence of the illuminance (under the condition of insufficient light or no light) of the traditional human face capturing camera at night, and many common lenses play a shooting role at night, and an infrared lamp is added for light supplement to generate black and white pictures or a strong flashing lamp is used for light supplement to obtain color pictures.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, the invention provides a method for improving the night face image quality.
In a first aspect, an embodiment of the present application provides a method for capturing and monitoring a face based on dual spectrum, where the method includes:
acquiring image data of infrared spectrum and visible spectrum;
fusing the image data to obtain optimal image data;
generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face;
and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture.
In a second aspect, embodiments of the present application further provide a dual-spectrum based dual-spectrum face capture and monitoring system, the system including:
an acquisition module: acquiring image data of infrared spectrum and visible spectrum;
a fusion module: fusing the image data to obtain optimal image data;
a generation module: generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face;
a cutting module: and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture.
In a third aspect, an embodiment of the present application further provides a dual-spectrum-based face capturing and monitoring device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the dual-spectrum-based face capturing and monitoring method according to the first aspect.
In a fourth aspect, embodiments of the present application further provide a storage medium having a computer storage stored thereon, where the computer program is executed by a processor to implement the steps of the dual spectrum-based face capturing and monitoring method according to the first aspect.
The embodiment of the application provides a double-spectrum-based face snapshot and monitoring method, which comprises the following steps: acquiring image data of infrared spectrum and visible spectrum; fusing the image data to obtain optimal image data; generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face; and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture. The double-spectrum camera has the same effect as a common camera under the condition of sufficient light source, but can still shoot out colored pictures under the condition of insufficient light source or no light, can also effectively reduce light pollution, improves the face image quality at night, does not need to carry out highlight compensation when capturing a snapshot on the road, causes the condition that pedestrians or vehicles generate dazzling and dazzling, increases the experience effect of customer use, and improves the satisfaction degree.
Drawings
The detailed structure of the invention is described in detail below with reference to the accompanying drawings
FIG. 1 is a schematic flow chart of a dual spectrum-based face capture and monitoring method of the present invention;
FIG. 2 is a schematic sub-flow diagram of a dual-spectrum-based face capture and monitoring method of the present invention;
FIG. 3 is another sub-flow diagram of the dual spectrum-based face capture and monitoring method of the present invention;
FIG. 4 is another sub-flow diagram of the dual spectrum-based face capture and monitoring method of the present invention;
FIG. 5 is another sub-flow diagram of the dual spectrum-based face capture and monitoring method of the present invention;
fig. 6 is a schematic diagram of program modules of the dual spectrum-based face capture and monitoring method of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a dual-spectrum-based face capturing and monitoring method in an embodiment of the present application, where in the embodiment, the dual-spectrum-based face capturing and monitoring method includes:
In the embodiment, the dual-spectrum camera is used for collecting images from two paths of image sensors, wherein one path is visible light, the other path is infrared light, and the images collected by the two paths of image sensors are processed to generate bright YUV format color images. The method for collecting image data by the image sensor comprises the steps that an optical signal passes through a lens and then passes through a double-optical prism, and light splitting and beam splitting are carried out on the inclined plane of the double-optical prism, namely infrared light penetrates through the prism and then reaches a CMOS image sensor receiving the infrared light, so that a brightness signal of an image is obtained, and visible light is reflected on the inclined plane of the prism and then reaches the CMOS image sensor receiving the visible light, so that an image color signal is obtained. The YUV is a color coding method, often used in various video processing components, which allows for reduced chroma bandwidth in view of human perceptibility when encoding photos or videos.
And step 102, fusing the image data to obtain optimal image data.
In this embodiment, in a certain scene, the image signal of the visible light and the image signal of the infrared light are fused to obtain the optimal image data, but the optimal image data is not limited to only a certain scene, and actually, the classification calculation of scenes is performed first, for example, a normal scene, a scene in which the visible light exists at night, a scene in which the infrared reflector exists at night, and a normal scene at night are synthesized, and then the optimal scene image data is synthesized, and the video frame data at that time is output.
103, generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face.
The generating of the alarm information specifically includes inputting an original video acquired by the image sensor to the face detection unit in a YUV format data frame, where YUV is a color coding method and is often used in each video processing component, and when YUV codes a photo or a video, it allows reducing a bandwidth of chromaticity in consideration of human perception capability. The face detection unit is responsible for analyzing each frame of YUV original data generated by the camera and outputting alarm information, and the alarm information only comprises rectangular region coordinates of the position of the face.
And step 104, cutting the optimal image data according to the rectangular area coordinates to generate a face picture.
The cutting of the face picture in the rectangular area coordinate specifically comprises cutting the specific position of the face from the rectangular coordinate position in the original video in the YUV format at the same time of face detection, namely cutting the face picture in the YUV format from the complete video frame picture, and then encoding the face picture in the YUV format into the picture data in the JPG format by adopting an MJPEG encoder.
The embodiment of the application provides a double-spectrum-based face snapshot and monitoring method, which comprises the following steps: acquiring image data of infrared spectrum and visible spectrum; fusing the image data to obtain optimal image data; generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face; and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture. The double-spectrum camera has the same effect as a common camera under the condition of sufficient light source, but can still shoot out colored pictures under the condition of insufficient light source or no light, can also effectively reduce light pollution, improves the face image quality at night, does not need to carry out highlight compensation when capturing a snapshot on the road, causes the condition that pedestrians or vehicles generate dazzling and dazzling, increases the experience effect of customer use, and improves the satisfaction degree.
Further, based on the above embodiment, referring to fig. 2, fig. 2 is a sub-flow diagram of the double-spectrum-based face capturing and monitoring method in this embodiment, the specific steps of obtaining the optimal image data include:
the light passes through the lens and then the double-light prism, and the light is split on the inclined plane of the double-light prism;
the image sensor obtains an image color signal of a visible spectrum and an image brightness signal of an infrared spectrum;
respectively carrying out color processing on an image color signal of a visible spectrum and an image brightness signal of an infrared spectrum, and processing image data in an MIPI format to obtain image data in an RAW format;
respectively carrying out white balance processing on the image color signals of the visible spectrum and the image brightness signals of the infrared spectrum after color processing, and processing the image data in the RAW format to obtain the image data in the RGB format;
respectively carrying out histogram statistics on the image color signals of the visible spectrum and the image brightness signals of the infrared spectrum after the white balance processing to obtain the color distribution of the image data of the visible spectrum and the infrared spectrum, and processing the image data in the RGB format to obtain the image data in the YUV format;
and fusing the visible spectrum image color signal and the infrared spectrum image brightness signal after the white balance processing with the visible spectrum image color signal and the infrared spectrum image brightness signal after color distribution to obtain the optimal image data in a YUV format.
Further, based on the foregoing embodiment, referring to fig. 3, fig. 3 is a sub-flow schematic diagram of the double-spectrum-based face capturing and monitoring method in this embodiment, the foregoing step 103 generates alarm information according to the optimal image data, where the alarm information at least includes a rectangular area coordinate of a position where a face is located. The method comprises the steps of inputting an original video shot by a camera in a YUV format to a face detection unit in a data frame mode, wherein the face detection unit is responsible for analyzing each frame of YUV original data generated by the camera, outputting alarm information and caching the alarm information into an event linked list.
Specifically, the alarm information includes not only the coordinates of the rectangular area including the position of the face, but also a unique number and a timestamp, where the unique number is the unique number that each person has, and the timestamp is the time at that time.
Further, based on the above embodiment, referring to fig. 4, fig. 4 is a sub-flow diagram of the method for capturing and monitoring a face based on dual spectrum in this embodiment, and in this embodiment, the method includes the specific steps of detecting whether a face exists, and cropping the optimal image data according to the rectangular area coordinates to generate a face picture:
firstly, encoding an original video in a YUV format to generate a video in a JPG format, and obtaining a video frame and a video frame timestamp in the JPG format;
simultaneously detecting whether a human face exists in an original video in a complete YUV format;
if the face exists, alarm information is output, wherein the alarm information comprises a rectangular area coordinate where the face is located, a unique number of the face and a timestamp;
then, cutting the coordinates of the face rectangular area in the alarm information to obtain a face picture and a face timestamp in the current YUV format;
and coding the face picture in the current YUV format to obtain the face picture in the JPG format.
Further, based on the above embodiment, referring to fig. 5, fig. 5 is a sub-flowchart of the method for capturing and monitoring a face based on dual spectrum in this embodiment, which includes the specific steps of outputting a face picture based on a 5G transmission mode:
firstly, establishing connection between a camera and a back-end server, wherein the back-end server sends a connection establishment request to a specified camera, and the camera agrees and returns a response after receiving the request;
the back-end server sends a video and picture request to the appointed camera, and the camera sends the video and the picture to the back-end server after receiving the request;
and the back-end server sends a disconnection request to the specified camera, and the camera agrees to disconnection and returns a response after receiving the request.
Further, an embodiment of the present application further provides a dual-spectrum-based face capturing and monitoring device 200, referring to fig. 6, where fig. 6 is a schematic diagram of a dual-spectrum-based face capturing and monitoring device module in an embodiment of the present application, and in this embodiment, the dual-spectrum-based face capturing and monitoring device 200 includes:
the acquisition module 201: acquiring image data of infrared spectrum and visible spectrum;
the fusion module 202: fusing the image data to obtain optimal image data;
the generation module 203: generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face;
a clipping module 204: and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture.
The double-spectrum-based face snapshot and monitoring device 200 provided by the embodiment of the application can realize that: acquiring image data of infrared spectrum and visible spectrum; fusing the image data to obtain optimal image data; generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face; and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture. The double-spectrum camera has the same effect as a common camera under the condition of sufficient light source, but can still shoot out colored pictures under the condition of insufficient light source or no light, can also effectively reduce light pollution, improves the face image quality at night, does not need to carry out highlight compensation when capturing a snapshot on the road, causes the condition that pedestrians or vehicles generate dazzling and dazzling, increases the experience effect of customer use, and improves the satisfaction degree.
Further, the embodiment of the present application further provides a dual-spectrum-based face capturing and monitoring device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, each step of the above-mentioned dual-spectrum-based face capturing and monitoring method is implemented.
Further, the present application also provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the dual spectrum-based face capture and monitoring method as described above.
Each functional module in the embodiments of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should be noted that, for the sake of simplicity, the above-mentioned method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no acts or modules are necessarily required of the invention.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In view of the above description of the method, system, device and storage medium for capturing and monitoring a human face based on dual spectrum, those skilled in the art will appreciate that the embodiments of the present invention can be modified in the specific implementation manners and application ranges according to the ideas of the present application.
Claims (10)
1. A dual-spectrum based face capture and monitoring method, the method comprising:
acquiring image data of infrared spectrum and visible spectrum;
fusing the image data to obtain optimal image data;
generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face;
and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture.
2. The method of claim 1, wherein acquiring image data of the infrared spectrum and the visible spectrum comprises:
acquiring an image brightness signal of an infrared spectrum and an image color signal of a visible spectrum;
and processing the image brightness signal of the infrared spectrum and the image color signal of the visible spectrum to obtain image data of the infrared spectrum and the visible spectrum.
3. The method of claim 2, wherein said processing the image brightness signal of the infrared spectrum and the image color signal of the visible spectrum comprises:
respectively carrying out color processing on image signals of infrared spectrums and visible spectrums;
respectively carrying out white balance processing on the two image signals after the color image processing;
and respectively carrying out histogram statistics on the two image signals after the white balance processing to obtain the color distribution of the two image signals.
4. The method of claim 3, wherein said fusing the image data to obtain optimal image data comprises:
and fusing the two image signals subjected to the white balance processing and the color distribution of the two image signals to obtain optimal image data.
5. The method of claim 1, wherein after generating alert information based on the optimal image data, further comprising:
and storing the alarm information.
6. The method of claim 1, wherein the alert information further includes a unique number, a time stamp.
7. The method of claim 1, wherein after the cropping the fused image data according to the rectangular region coordinates to generate a face picture, further comprising:
and outputting the face picture, wherein the face picture is output based on a 5G transmission mode.
8. A dual spectrum-based face capture and monitoring system, the system comprising:
an acquisition module: acquiring image data of infrared spectrum and visible spectrum;
a fusion module: fusing the image data to obtain optimal image data;
a generation module: generating alarm information according to the optimal image data, wherein the alarm information at least comprises rectangular area coordinates of the position of the face;
a cutting module: and cutting the optimal image data according to the rectangular region coordinates to generate a human face picture.
9. A dual-spectrum based human face capturing and monitoring device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the dual-spectrum based human face capturing and monitoring method according to any one of claims 1 to 7.
10. A storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the dual spectrum based face capture and monitoring method of any one of claims 1 to 7.
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