CN111246172A - Linkage image acquisition device and image acquisition method - Google Patents
Linkage image acquisition device and image acquisition method Download PDFInfo
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- CN111246172A CN111246172A CN202010065231.6A CN202010065231A CN111246172A CN 111246172 A CN111246172 A CN 111246172A CN 202010065231 A CN202010065231 A CN 202010065231A CN 111246172 A CN111246172 A CN 111246172A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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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
- H04N23/67—Focus control based on electronic image sensor signals
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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
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
Abstract
The invention discloses a linkage image acquisition device and an acquisition method, wherein the acquisition device comprises a control chip, the control chip is connected with a first sensor and a second sensor, the first sensor is connected with a gun camera, the second sensor is connected with a ball machine, the gun camera is used for acquiring a panoramic video, and the ball machine is used for acquiring target characteristic information in the panoramic video. The linkage image acquisition device integrates a gun camera and a ball camera, the gun camera and the ball camera are controlled through the same control chip, the product integration level is high, the gun camera is used for carrying out intelligent analysis on the panoramic video, the ball camera is used for amplifying, tracking, snapshotting and extracting attribute characteristics of a target selected from the panoramic video, and the information of the target output under the panoramic scene and the detail scene is displayed in an associated mode, so that the details of the target image and the target image in the panoramic scene are considered. The target image is captured more efficiently and more comprehensively.
Description
Technical Field
The invention belongs to the technical field of security monitoring, and particularly relates to an image acquisition device and an image acquisition method for linkage of a gunlock and a dome camera.
Background
In the current intelligent era, the demand of intelligent services under the same scene is continuously increased, the fields of video monitoring and the like can be monitored, analyzed, identified and tracked no longer only by one camera device, particularly for squares with dense crowds or complex crossroads, the behaviors of motor vehicles, non-motor vehicles and pedestrians (collectively referred to as targets) in a panoramic scene are often required to be controlled, meanwhile, detail analysis is required to be carried out on all targets, relevant attributes are extracted, information output by the same target under the panoramic scene and the detailed scene is required to be managed and displayed, and the requirements can not be met by a single camera. At present, although a technical scheme of combined monitoring of a gun camera and a ball machine exists, the gun camera and the ball machine are generally of independent structures, the product integration level is low, the occupied space is large, the effect of relevant display of information of a panoramic scene and a detailed scene cannot be realized, and the panoramic and detailed compatibility is poor.
Disclosure of Invention
Therefore, the invention provides a linkage image acquisition device and an acquisition method integrating a gun camera and a dome camera to solve the technical problems.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a linkage image acquisition device which comprises a control chip, wherein the control chip is connected with a first sensor and a second sensor, the first sensor is connected with a gun camera, the second sensor is connected with a ball machine, the gun camera is used for acquiring a panoramic video, and the ball machine is used for acquiring target characteristic information in the panoramic video.
Preferably, the gunlock is used for acquiring a panoramic video, capturing a target and extracting a target picture, and the dome camera is used for extracting the structural attribute of the target according to a preset linkage strategy between the dome camera and the gunlock.
In another aspect, the present invention provides a method for acquiring an image by using the linkage image acquisition device, which comprises the following steps:
controlling the gunlock to collect a panoramic video frame of a preset area, and extracting a target picture in the panoramic video frame;
and controlling the gunlock to be linked with the dome camera, feeding back the position information of the target relative to the dome camera, controlling the dome camera to track the target, and performing structural feature extraction on the target.
Preferably, before controlling the rifle bolt and the ball machine to be linked, the method further comprises: and calibrating the gun camera and the ball machine to enable the target to be mutually converted in the video coordinate systems of the gun camera and the ball machine.
Preferably, the pair of bolt or ball machines is marked as:
selecting 6 points from the video acquired by the gunlock;
sequentially placing the positions of 6 points at the central position of the field of view of the dome camera under the multiplying power of 1 time;
and saving the horizontal position and the vertical position of the target in the gunlock and the horizontal position and the vertical position of the target in the ball machine, and setting the zoom multiple to be 1 time.
Preferably, the pair of bolt or ball machines is marked as:
selecting 24 reference points on the bolt;
comparing the similarity between a target image in a certain area with one reference point as the center in the field of view of the gun camera and a target image in a certain area with the center point as the center in the field of view of the dome camera, if the similarity exceeds a preset threshold value, recording the horizontal position and the vertical position of the reference point in the gun camera, recording the horizontal position and the vertical position of the target in the dome camera, and setting the zoom multiple to be 1 time;
and 6 groups of data with the highest image similarity are selected for calibration calculation.
Preferably, the calibration calculation is performed by the following formula:
Q＝a1*X2+a2*XY+a3*Y2+ a 4X + a 5Y + a6, wherein a1, a2, a3, a4 and a5 are equation coefficients, X is the X-direction coordinate, Y is the Y-direction coordinate, and Q is the target position.
Preferably, the method further comprises the step of presetting linkage operation signals before linkage of the gun camera and the ball machine, wherein the linkage operation signals comprise: at least one of a target area intrusion signal, a target lane crossing signal, a target vehicle stop signal, and a target loitering signal.
Preferably, if the linkage operation signals are multiple, the processing sequence of the dome camera is determined according to the effect of the target in the video acquired by the gun camera, the moving distance from the dome camera to the linkage position or the target attribute to be analyzed.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the linkage image acquisition device comprises a control chip, wherein the control chip is connected with a first sensor and a second sensor, the first sensor is connected with a gun camera, the second sensor is connected with a ball machine, the gun camera is used for acquiring panoramic videos, and the ball machine is used for acquiring target characteristic information in the panoramic videos. The linkage image acquisition device integrates a gun camera and a ball camera, the gun camera and the ball camera are controlled through the same control chip, the product integration level is high, the gun camera is used for carrying out intelligent analysis on the panoramic video, the ball camera is used for amplifying, tracking, snapshotting and extracting attribute characteristics of a target selected from the panoramic video, and the information of the target output under the panoramic scene and the detail scene is displayed in an associated mode, so that the details of the target image and the target image in the panoramic scene are considered. The target image is captured more efficiently and more comprehensively.
(2) The image acquisition method comprises the steps of firstly controlling a gun camera to obtain a panoramic video frame of a preset area, extracting a target picture, controlling the gun camera to be linked with a dome camera, feeding back position information of a target relative to the dome camera, controlling the dome camera to track the target, and performing structural feature extraction on the target. The extraction efficiency of the target feature information is improved, and the global feature of the target and the detail feature of the target can be obtained at the same time. The same target can be converted into a video coordinate system of the gunlock and the dome camera, and the whole-process tracking, snapshot and attribute analysis of the target are realized.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a flowchart of a method of acquiring an image according to embodiment 2 of the present invention;
FIG. 2 is a flow chart of a first calibration mode in the method according to embodiment 2 of the present invention;
fig. 3 is a flow chart of a second calibration method in the method according to embodiment 2 of the present invention.
Detailed Description
Example 1
The embodiment provides a linkage image acquisition device, and it includes a control chip, control chip is connected with first sensor and second sensor, first sensor is connected with a rifle bolt camera, the second sensor is connected with a ball machine camera. The gunlock camera is used for acquiring a panoramic video in a preset area and analyzing the video, and the ball machine is used for acquiring characteristic information of a specific target in the panoramic video.
Specifically, the rifle bolt is used for acquiring a panoramic video in a certain area, and intelligently analyzing the panoramic video so as to snapshot a certain target and extract a picture of the target; and a linkage strategy of the gun camera and the dome camera is preset in the control chip, so that after the gun camera acquires the panoramic video, the dome camera tracks, amplifies, captures and extracts and analyzes the attribute characteristics of a certain target in the panoramic video according to the linkage rule. Therefore, the information output by the same target under the panoramic scene and the detailed scene is displayed in an associated manner, and the effect of taking the global effect of the target and the detailed effect of the target into consideration is achieved.
Linkage image acquisition device is different with the simple interconnection of conventional rifle bolt and ball machine, is that same control chip connects two sensors simultaneously, and two sensors are connected with a rifle bolt and a ball machine respectively to realized the coordinated control to rifle bolt and ball machine, compared with conventional camera, the device has reached the purpose that panorama and detail are compromise, and image acquisition, treatment effeciency are higher.
Example 2
The present embodiment provides a method for acquiring an image by using the linkage image acquisition device described in embodiment 1, as shown in fig. 1, the method includes the following steps:
and S1, controlling the gunlock to collect a panoramic video frame of a preset area, and extracting a target picture in the panoramic video frame.
In this step, the control chip controls the bolt face to acquire a panoramic video frame of a preset area, and performs snapshot, optimization and deduplication processing on a certain target in the panoramic video, and finally outputs a picture with the best effect of the target in the panoramic video to become a target picture, and further performs structural feature extraction processing on the target picture.
And S2, controlling the gunlock to be linked with the dome camera, feeding back the position information of the target in the panoramic video relative to the dome camera, controlling the dome camera to track the target, and extracting the structural features of the target.
The control chip feeds back the target position in the panoramic video to the dome camera according to a preset linkage strategy, the target position is placed in the center of the field of view of the dome camera, the dome camera tracks the target for a period of time, the dome camera captures, prefers and removes the weight of the target within the tracking time, a detailed picture with the best target effect is output, and structural feature extraction is carried out on the detailed picture.
Specifically, after any target in a video acquired by a gunlock is linked to a dome camera, the dome camera is calculated to move from the current position to amplify the target to a certain multiple according to the position of the target in the video of the gunlock, the values of P (left and right), T (up and down) and Z (zoom) of the target needing to operate in the center of the field of view of the dome camera are calculated, the dome camera is controlled to carry out PTZ operation according to the value of P, T, Z, the target is amplified to a preset multiple, and the target is located at the center of the picture of the dome camera.
According to the steps, the associated output of the panoramic target picture and the attribute acquired by the gun camera and the detailed target picture and the attribute acquired by the dome camera is realized. In this embodiment, the correlation output may be correlation output between a target human body in the panoramic video and a human face in the detail picture; or the associated output can be the associated output of the motor vehicle captured under the panoramic video and the driver in the motor vehicle in the detail picture acquired by the dome camera; or the correlated output can be the correlated output of the human face driving the non-motor vehicle in the detail pictures acquired by the non-motor vehicle and the dome camera captured under the gun panoramic video, so that the technical effect of considering both the global effect and the detail effect of the specific target is realized.
Further, before controlling the linkage of the gun camera and the ball machine, the method comprises the following steps: and calibrating the gun camera and the ball machine, and mutually converting the target in the video coordinate systems of the gun camera and the ball machine so as to realize the correlated output of the target in the video images acquired by the gun camera and the ball machine.
The calibration includes two ways, the first one is shown in fig. 2:
s11, 6 points are selected from the video acquired by the gun camera, and the 6 points are approximately uniformly distributed on the video image acquired by the gun camera, preferably points with obvious mark objects (such as bright and dark points).
S12, sequentially setting the positions of 6 points at the central position of the field of view of the dome camera under the magnification of 1 time, storing the horizontal position and the vertical position of the target in the video acquired by the gun camera, storing the P position and the T position of the target in the video acquired by the dome camera, and setting the zoom magnification to 1 time.
Alternatively, as shown in fig. 3, the calibration may be performed in a second calibration manner:
and S11, selecting 24 reference points on the bolt, equally dividing the bolt video image into 5 x 5 columns of squares, taking the center of each square as each point, and removing the last square.
And S12, comparing the similarity between the target image in a certain area with one reference point as the center in the field of view of the gun and the target image in a certain area with the center point as the center in the field of view of the dome camera, if the similarity exceeds a preset threshold, recording the horizontal position and the vertical position of the reference point in the gun, recording the horizontal position and the vertical position of the target in the dome camera, and setting the zoom multiple to be 1 time.
And S13, selecting 6 groups of data with the highest image similarity from the 24 groups of calibrated data to perform calibration calculation.
The calibration calculation is performed by the following formula:
Q＝a1*X2+a2*XY+a3*Y2+ a 4X + a 5Y + a6, wherein a1, a2, a3, a4 and a5 are equation coefficients, X is X-direction coordinates, Y is Y-direction coordinates, and Q is a target position, further, Q is replaced by P, X is replaced by X, and Y is replaced by Y, so that values of P from a1 to a6 are obtained; substituting Q for T, X for X, and Y for Y, yields values for T from a1 to a 6.
When the target position in the video acquired by the gun camera is known, the P, T value in the dome camera video can be obtained according to the formula, and the zoom multiple is obtained according to the size of the target in the video image acquired by the gun camera and the size of the expected target in the dome camera image.
Furthermore, according to the requirements of an application scene, before controlling the linkage of the gun and the dome camera, the method further comprises the step of setting a linkage operation signal, wherein the linkage operation signal can be at least one of a target area intrusion signal, a target line crossing signal, a target vehicle stopping signal and a target loitering signal.
And if the gun machine detects that a plurality of targets can trigger the linkage operation signal at the same time, the gun machine sequentially links the dome cameras according to a multi-target linkage optimization strategy, and the multi-target linkage optimization strategy determines the sequence of the linked dome cameras according to the optimal effect of each target in the gun machine video, the distance from the current dome camera position to the linkage position (the dome camera with the shortest preferential linkage distance), and the target attribute (structural characteristic) of each target to be analyzed in the dome camera video. The ball machine directly reaches the linkage position at the current position, tracking, snapshot and attribute analysis are carried out on the target for a period of time, after the preset tracking time is exceeded, the target is switched to the next target for tracking, snapshot and attribute analysis, and when the ball machine tracks the last target, the target is subjected to whole-course tracking, snapshot and attribute analysis. In addition, as the ball machine moves from the initial position to the set linkage position, a certain delay exists in time, in the gunlock video, the linkage position of the target needs to be predicted according to the motion track of the target and in combination with the motion state (mainly referring to the motion speed) of the ball machine, and after the position prediction is carried out, the target can be quickly locked.
In this embodiment, the linkage image acquisition device can be applied in the following scenes:
(1) the linkage image acquisition device is arranged in a square in which an inaccurate vehicle enters, and is started to enable the gunlock to be subjected to panoramic detection, detect that the vehicle enters the square, control the ball machine to be linked with the gunlock, capture and amplify the vehicle, extract the license plate of the vehicle, perform corresponding upper-level platform alarm, and upload the panoramic picture of the vehicle in the square and the close-up picture of the vehicle.
(2) The linkage image acquisition device is arranged on a non-motor lane, the non-motor lane requires a non-motor driver to wear a helmet, the linkage image acquisition device is started, the gunlock performs panoramic detection and attribute extraction (extracts whether the non-motor driver wears a safety helmet) on the non-motor lane, if the driver does not wear the safety helmet, the ball machine is controlled to be linked with the gunlock, the face of the driver is captured in an amplification mode, the face picture of the driver is obtained, a rear-end platform is uploaded, and the face picture is compared with face data prestored in a database to obtain identity information of the driver who does not wear the safety helmet.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. The utility model provides a linkage image acquisition device, its characterized in that, includes control chip, control chip is connected with first sensor and second sensor, first sensor is connected with a rifle bolt, the second sensor is connected with a ball machine, the rifle bolt is used for acquireing the panoramic video, the ball machine is arranged in acquireing the target characteristic information in the panoramic video.
2. The linkage image acquisition device according to claim 1, wherein the gunlock is used for acquiring a panoramic video, capturing a target and extracting a target picture, and the dome camera is used for performing structured attribute extraction on the target according to a preset linkage strategy between the dome camera and the gunlock.
3. A method of capturing images using the linked image capturing device of claim 1 or 2, comprising the steps of:
controlling the gunlock to collect a panoramic video frame of a preset area, and extracting a target picture in the panoramic video frame;
and controlling the gunlock to be linked with the dome camera, feeding back the position information of the target relative to the dome camera, controlling the dome camera to track the target, and performing structural feature extraction on the target.
4. The image capturing method according to claim 3, wherein before controlling the gun camera to be linked with the ball machine, the method further comprises: and calibrating the gun camera and the ball machine to enable the target to be mutually converted in the video coordinate systems of the gun camera and the ball machine.
5. The image acquisition method according to claim 4, characterized in that said pair of bolt or ball machines is marked as:
selecting 6 points from the video acquired by the gunlock;
sequentially placing the positions of 6 points at the central position of the field of view of the dome camera under the multiplying power of 1 time;
and saving the horizontal position and the vertical position of the target in the gunlock and the horizontal position and the vertical position of the target in the ball machine, and setting the zoom multiple to be 1 time.
6. The image acquisition method according to claim 4, characterized in that said pair of bolt or ball machines is marked as:
selecting 24 reference points on the bolt;
comparing the similarity between a target image in a certain area with one reference point as the center in the field of view of the gun camera and a target image in a certain area with the center point as the center in the field of view of the dome camera, if the similarity exceeds a preset threshold value, recording the horizontal position and the vertical position of the reference point in the gun camera, recording the horizontal position and the vertical position of the target in the dome camera, and setting the zoom multiple to be 1 time;
and 6 groups of data with the highest image similarity are selected for calibration calculation.
7. The image acquisition method according to claim 6, wherein the calibration calculation is performed by the following formula:
Q＝a1*X2+a2*XY+a3*Y2+ a 4X + a 5Y + a6, wherein a1, a2, a3, a,
a4 and a5 are equation coefficients, X is an X-direction coordinate, Y is a Y-direction coordinate, and Q is a target position.
8. The image capturing method according to any one of claims 3 to 7, wherein the step of presetting a linkage operation signal before controlling the gun camera to be linked with the ball machine further comprises: at least one of a target area intrusion signal, a target lane crossing signal, a target vehicle stop signal, and a target loitering signal.
9. The image capturing method according to claim 8, wherein if there are a plurality of the linkage operation signals, a processing sequence of the dome camera is determined according to an effect of a target in the video obtained by the gun camera, a moving distance of the dome camera to a linkage position, or a target attribute to be analyzed.
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| CN111800605A (en) * | 2020-06-15 | 2020-10-20 | 深圳英飞拓科技股份有限公司 | Gun-ball linkage based vehicle shape and license plate transmission method, system and equipment |
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| CN112351200A (en) * | 2020-10-13 | 2021-02-09 | 深圳英飞拓科技股份有限公司 | Method and system for realizing linkage snapshot of gun-ball intelligent camera |
| CN112243110A (en) * | 2020-10-15 | 2021-01-19 | 成都易瞳科技有限公司 | Panoramic target track recording device and recording method |
| CN112243110B (en) * | 2020-10-15 | 2023-03-24 | 成都易瞳科技有限公司 | Panoramic target track recording method |
| CN112954274A (en) * | 2021-02-04 | 2021-06-11 | 三亚海兰寰宇海洋信息科技有限公司 | Video snapshot method and system for ship |
| CN113393492A (en) * | 2021-05-27 | 2021-09-14 | 浙江大华技术股份有限公司 | Target tracking method, target tracking device, electronic device and storage medium |
| CN113660464A (en) * | 2021-08-16 | 2021-11-16 | 北京中安瑞力科技有限公司 | One-to-many gun ball linkage method and linkage system |
| CN114866697A (en) * | 2022-04-29 | 2022-08-05 | 重庆紫光华山智安科技有限公司 | Video display method and device, video shooting equipment and storage medium |
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