CN110012223A - A kind of method and system for realizing cloud platform rotation based on image cropping - Google Patents
A kind of method and system for realizing cloud platform rotation based on image cropping Download PDFInfo
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- CN110012223A CN110012223A CN201910225695.6A CN201910225695A CN110012223A CN 110012223 A CN110012223 A CN 110012223A CN 201910225695 A CN201910225695 A CN 201910225695A CN 110012223 A CN110012223 A CN 110012223A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000007704 transition Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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- 230000001131 transforming effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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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
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/2628—Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
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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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Abstract
The present invention discloses a kind of method and system that cloud platform rotation is realized based on image cropping, the system includes: that the system includes camera unit and controlling terminal, the camera unit does not have rotatable cradle head structure, it include a high resolution sensor, a wide-angle lens, the resolution ratio of the high resolution sensor is greater than the target resolution of camera unit output, and the wide-angle lens field angle is m/a times of ratio of the field of regard angle that high resolution sensor exports maximum length m and the long a of target resolution.The present invention is a kind of solution that angle of view adjustment is realized based on image cropping, solves the problems, such as that traditional gun-shaped camera angles fixation can not adjust；The mode of plug-in holder is compared, the present invention greatly reduces cost, and solves hardware machinery holder waterproofness, reliability, rotates the problems such as being prone to wear aging for a long time；Conventional panoramic camera scheme is compared, the present invention will not influence image quality in implementation process, and not influence master control performance completely.
Description
Technical field
The technology for realizing viewing angle control is cut the present invention relates to image, more particularly to a kind of based on image cropping realization holder
The method and system of rotation.
Background technique
The machine that camera lens both horizontally and vertically moves may be implemented in PTZ camera, the machine energy relative to fixed lens
It is enough that wider array of field range is obtained to which more pictures and information be presented by rotation camera lens.Itself is additional for PTZ camera
Increase the cost of external hanging hardware (horizontal stage electric machine component), and in communication control may due to aging circuit, structural failure,
The factors such as motor fatigue failure, which have unstable situation, to be occurred, and the processing mode for comparing compromise is belonged to.
Based on the existing camera unit for being capable of providing fixed angle and the output of size picture, such as gun-shaped video camera, biography
How system household video camera, realize the rotating effect of PTZ camera, is the original intention of research and development of the invention.
Summary of the invention
In view of the problems of the existing technology, the present invention provide it is a kind of based on image cropping realize cloud platform rotation method and
System.
To achieve the above object, the specific technical solution of the present invention is as follows:
A kind of system for realizing cloud platform rotation based on image cropping, which includes camera unit and controlling terminal, this is taken the photograph
It include a high resolution sensor, a wide-angle lens, the high resolution sensor as unit does not have rotatable cradle head structure
Resolution ratio be greater than camera unit output target resolution, the wide-angle lens field angle be high resolution sensor export most
M/a times of ratio of the field of regard angle of long length m and the long a of target resolution；
The output picture size of target output picture size setting high resolution sensor based on wide-angle lens, the control
Terminal processed is located at the position of the photosensitive picture of entire high resolution sensor by the picture that App controls high resolution sensor output
So that sensor output designated position starts the picture of specified size, achieve the purpose that picture is cut.
Preferably, the resolution ratio of the high resolution sensor is more than or equal to the 2 of the target resolution of camera unit output
Times.
Preferably, the camera unit further includes main control chip, network connection mould group；It is each that the main control chip is responsible for connection
Class peripheral hardware simultaneously carries out logical process, is pre-processed to the video flowing of high resolution sensor output, encodes compression, saves and grasp
Make；The network connection mould group is for connecting interaction with APP and server, realizing video and controlling the real-time Transmission of data.
Preferably, shown camera unit is gun-shaped video camera or traditional-family's video camera.
The present invention also provides a kind of method for realizing cloud platform rotation based on image cropping, be applied to including camera unit and
In the system of controlling terminal, which does not have rotatable cradle head structure, includes a high resolution sensor, a wide-angle lens
Head, the resolution ratio of the high resolution sensor are greater than the target resolution of camera unit output, the wide-angle lens field angle
M/a times of ratio of the field of regard angle of maximum length m and the long a of target resolution are exported for high resolution sensor；This method packet
Include following steps:
The output picture size of target output picture setting high resolution sensor based on wide-angle lens, works as camera unit
Receive the control instruction of APP sending, the target point provided according to control algolithm, the picture that setting high resolution sensor exports
Positioned at the position of the photosensitive picture of entire high resolution sensor so that sensor output designated position starts specified size
Picture achievees the purpose that picture is cut.
Preferably, the control algolithm increases starting point to the transition point between target point during screen switching, reaches
The effect smoothly moved to picture.
Further, the control algolithm are as follows:
Each user instruction issues the mobile certain length of rear holder, and direction, which is presented as, adds and subtracts certain length, by soft
The register that part reads camera unit can accurately learn the position of holder, and the expection target point to be moved to is calculated, and lead to
It crosses path planning algorithm and obtains movement routine；
After the completion of path planning, step cycle can be formed by increasing transition point；It is long by each Moving Unit stepping
The scheme of degree is constantly updated, and is advanced to target position, is finally exactly that picture changes with the rotation of holder on user experience.
The invention discloses a kind of schemes that viewing angle control is realized based on image cutting technique, can make with this solution
Do not have rotatable cradle head structure gun shaped video camera machine can with operation adjustment visual angle so that user be concerned about picture show,
Realize the soft holder gun shaped video camera of the function as PTZ camera.
The present invention realizes that the cost for not needing external hanging hardware can be achieved with the function at adjustment visual angle by the way of software,
And control algolithm can be constantly updated by way of upgrading to improve user experience.
Panoramic camera is compared, is to carry out software video contracting again after obtaining the whole scene information completed by fish-eye camera
Put correction；Although monitoring, visual angle is wide, and local resolution is lower, poor definition；To reach the video image quality of standard high definition,
CPU processing capacity and sensor and camera lens times over high definition is then needed to be adapted to.
For holder navigation feature, common PTZ camera needs to carry out picture capture by continuous mobile hardware holder
And synthesize position and state of the panoramic pictures to identify holder, and this programme then directly can panorama sketch implemented in software acquisition
And holder is moved manually there is no user and leads to the risk for losing holder position.
Relative to common hardware PTZ camera, this programme can accurately grasp the position of holder, Bu Huiyin in real time
For power down, user is mobile and generates error, makes guarantee for subsequent experience and data statistics.
Detailed description of the invention
Fig. 1 is the mobile schematic diagram of soft holder in the present invention；
Fig. 2 is that transition point adds schematic diagram in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
With reference to Fig. 1, firstly, the present invention provides a kind of system for realizing cloud platform rotation based on image cropping, which includes
Camera unit and controlling terminal, the camera unit do not have rotatable cradle head structure, include a high resolution sensor, a wide-angle
Camera lens, the resolution ratio of the high resolution sensor are greater than the target resolution of camera unit output, the view of the wide-angle lens
Rink corner is m/a times of ratio of the field of regard angle that high resolution sensor exports maximum length m and the long a of target resolution；
The output picture size of target output picture size setting high resolution sensor based on wide-angle lens, the control
Terminal processed is located at the position of the photosensitive picture of entire high resolution sensor by the picture that App controls high resolution sensor output
So that sensor output designated position starts the picture of specified size, achieve the purpose that picture is cut.
Wherein, the resolution ratio of the high resolution sensor is more than or equal to 2 times of the target resolution of camera unit output.
The camera unit further includes main control chip, network connection mould group；The main control chip is responsible for connecting all kinds of peripheral hardwares and be patrolled
Processing is collected, the video flowing of high resolution sensor output is pre-processed, compression is encoded, saves operation；The network connection
Mould group is for connecting interaction with APP and server, realizing video and controlling the real-time Transmission of data.
Specifically:
(1), for high resolution sensor, need selection bigger than actual demand resolution ratio, in order to reach better view
Angle span of control limit of control is typically chosen sensor of 2 times at least more than target resolution.Target resolution is in embodiment illustrated in fig. 1
1280*720, the practical maximum resolution of high resolution sensor are 2304*1536.
(2), for wide-angle lens, for presentation user's picture of concern, the field range of picture is according to actual view
Rink corner demand, detailed calculation method reference: the long a of target resolution (region I shown in Fig. 1 is 1280), sensor reality output is most
Long length is m (region II shown in Fig. 1 is 2304).
To reach the equivalent unchanged view angle of reality output, then camera lens needs to select m/a times of field angle of camera lens in this scheme
?.
Such as: if user wishes the conventional gun-type video camera effect for reaching 6mm, need to select 2.8mm camera lens (m/a=
2304/1280=3.3, existing camera lens specification generally have 2.8mm, 4mm, 6mm, 8mm etc., wherein 2.8mm closer to 3.3, therefore,
2.8mm camera lens is selected herein).
(3), soft holder interaction: the soft holder on mobile APP monitored picture can make picture is constantly mobile difference is presented
The picture of position.
User can arbitrarily move soft holder up and down, and picture can follow mobile so that user wants the specified of observation
Picture shows.
The present invention also provides a kind of method for realizing cloud platform rotation based on image cropping, be applied to including camera unit and
In the system of controlling terminal, which does not have rotatable cradle head structure, includes a high resolution sensor, a wide-angle lens
Head, the resolution ratio of the high resolution sensor are greater than the target resolution of camera unit output, more preferably, the high-resolution
The resolution ratio of sensor is more than or equal to 2 times of the target resolution of camera unit output；The field angle of the wide-angle lens is height
M/a times of ratio of the field of regard angle of resolution sensor output maximum length m and the long a of target resolution；This method includes such as
Lower step:
The output picture size of target output picture setting high resolution sensor based on wide-angle lens, works as camera unit
Receive the control instruction of APP sending, the target point provided according to control algolithm, the picture that setting high resolution sensor exports
Positioned at the position of the photosensitive picture of entire high resolution sensor so that sensor output designated position starts specified size
Picture achievees the purpose that picture is cut.
Preferably, the control algolithm increases starting point to the transition point between target point during screen switching, reaches
The effect smoothly moved to picture.
Further, the control algolithm are as follows:
Each user instruction issues the mobile certain length of rear holder, and direction, which is presented as, adds and subtracts certain length, by soft
The register that part reads camera unit can accurately learn the position of holder, and expection is calculated according to user instructions to be moved to
Target point, passage path planning algorithm obtains movement routine；
After the completion of path planning, step cycle can be formed by increasing transition point.It is long by each Moving Unit stepping
The scheme of degree is constantly updated, and is advanced to target position, is finally exactly that picture changes with the rotation of holder on user experience.
Specifically, the principle of the above-mentioned method that cloud platform rotation is realized based on image cropping is as follows:
(1), the above method is applied in the system including camera unit and controlling terminal, and the camera unit in the system is
Gun shaped video camera or traditional-family's video camera are this system for example, being the equipment of video acquisition when it is gun shaped video camera
The functions such as data acquisition, network communication, logical process are provided, comprising:
Wide-angle lens: optical module；
High resolution sensor: transforming into electric signal for optical signal, forms video flowing and handles for master control；
Main control chip: it is responsible for all kinds of peripheral hardwares of connection and carries out logical process, the video flowing of sensor output is located in advance
The operations such as reason, coding compression, preservation；
Network connection mould group: for connecting interaction with APP and server, realizing video and controlling the real-time biography of data
It is defeated.
(2), picture is cut
Picture cutting is the basis that soft holder is realized.By sending instructions to high resolution sensor, high-resolution is controlled
Sensor only exports target position, and (high resolution sensor is arranged in the as above-mentioned target output picture based on wide-angle lens
Export picture size), the form of target resolution video flowing realizes the output of local video picture；It is transmitted simultaneously in video flowing
In the process, interception area can be dynamically adjusted, under conditions of not influencing master control performance, realizes soft holder function.
Picture method of cutting out is that high score is arranged according to the picture size (such as: 1280*720) of the target of wide-angle lens output
The picture size of resolution sensor output, the target point provided according to control algolithm, the picture that setting sensor exports are located at whole
The position of a sensor photosensitive picture reaches picture sanction so that sensor output designated position starts the picture of specified size
The purpose cut.
(3) control algolithm
After camera unit receives instruction (such as " up and down ") of the cradle head control of APP sending, calculated according to control
Method, it is continuous to update camera picture clipping region, and increase starting point between target point during screen switching
Transition point achievees the effect that picture smoothly moves, to simulate the transition effect of true cloud platform rotation.
Control algolithm is mainly that each user instruction issues the mobile certain length of rear holder, and plus-minus one is presented as in direction
Fixed length.Because the present invention program can accurately learn holder position in real time therefore the expection target point to be moved to can be calculated,
Cook up movement routine.After the completion of path planning, it can establish and increase transition point formation step cycle, pass through each Moving Unit
The scheme of stepping length is constantly updated, and is advanced to target position, is exactly that picture changes with the rotation of holder on user experience.
Control algolithm needs the size of the target picture according to required for picture trimming algorithm to calculate boundary pixel coordinate,
Preventing from going beyond the scope in moving process causes data to overflow.
Picture transition point updates the speed that picture is updated dependent on sensor, too fast, and it is too late to will lead to sensor response
When, picture blocks, and it is not smooth then to will lead to picture Caton slowly excessively.The increase mode of transition point and target position and current location exist
There is relationship in the position of entire sensor photosensitive coordinate system, establishes coordinate system mark planning path, signal such as Fig. 2, and example is from working as
The transition of preceding point (576,456) to target point (1056,936) is planned, carries out adding for transition point by the way of 24 pixel of stepping
Add, the time delay between transition point depends on the renewal speed of picture.The size of stepping pixel determines the span that picture jumps, pixel
The the dynamic amplitude of bigger picture the big more Caton, the fewer picture of stepping pixel it is more smooth but will with the number of sensor interaction
Become more, resource frequency of usage will be more.
It continues to refer to figure 1, output 2304*1536 size (is supported by the high resolution sensor of 3,000,000 pixels
Picture) wide-angle lens is added, to obtain the field range more much broader than common gun shaped video camera.
Main control chip exports the video pictures of target 1280*720 size by adjusting webcam driver, then passes through network and connect
It connects mould group and is sent to the end APP and be presented to the user.
User controls holder by APP and is sent to gun shaped video camera by network, and gun shaped video camera receives control holder
Order can change the position of picture output by the starting point that change software method of cutting out cuts picture, continuous to adjust
Starting point can achieve the effect that field motion to realize the effect of holder.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (9)
1. a kind of system for realizing cloud platform rotation based on image cropping, which is characterized in that the system includes camera unit and control
Terminal, the camera unit do not have rotatable cradle head structure, and it includes have a high resolution sensor, a wide-angle lens, the height
The resolution ratio of resolution sensor is greater than the target resolution of camera unit output, and the wide-angle lens field angle is high-resolution
M/a times of ratio of the field of regard angle of sensor output maximum length m and the long a of target resolution；
The output picture size of target output picture size setting high resolution sensor based on wide-angle lens, the control is eventually
End by App control high resolution sensor output picture be located at the photosensitive picture of entire high resolution sensor position thus
So that sensor output designated position starts the picture of specified size, achieve the purpose that picture is cut.
2. the system according to claim 1 for realizing cloud platform rotation based on image cropping, which is characterized in that the high-resolution
The resolution ratio of rate sensor is more than or equal to 2 times of the target resolution of camera unit output.
3. the system according to claim 2 for realizing cloud platform rotation based on image cropping, which is characterized in that the camera shooting is single
Member further includes main control chip, network connection mould group；The main control chip is responsible for connecting all kinds of peripheral hardwares and carries out logical process, to height
The video flowing of resolution sensor output is pre-processed, encodes compression, saves operation；The network connection mould group be used for and
APP and server connection interaction, realize video and control the real-time Transmission of data.
4. the system according to claim 2 for realizing cloud platform rotation based on image cropping, which is characterized in that shown camera shooting is single
Member is gun-shaped video camera or traditional-family's video camera.
5. a kind of method for realizing cloud platform rotation based on image cropping is applied to the system including camera unit and controlling terminal
In, which is characterized in that the camera unit does not have rotatable cradle head structure, includes a high resolution sensor, a wide-angle lens,
The resolution ratio of the high resolution sensor is greater than the target resolution of camera unit output, and the wide-angle lens field angle is height
M/a times of ratio of the field of regard angle of resolution sensor output maximum length m and the long a of target resolution；This method includes such as
Lower step:
The output picture size of target output picture setting high resolution sensor based on wide-angle lens, when camera unit receives
The control instruction issued to APP, the target point provided according to control algolithm, the picture that setting high resolution sensor exports are located at
The position of the entire photosensitive picture of high resolution sensor so that sensor output designated position starts the picture of specified size,
Achieve the purpose that picture is cut.
6. the method according to claim 5 for realizing cloud platform rotation based on image cropping, which is characterized in that the control is calculated
Method increases starting point to the transition point between target point during screen switching, achievees the effect that picture smoothly moves.
7. the method according to claim 6 for realizing cloud platform rotation based on image cropping, which is characterized in that the control is calculated
Method are as follows:
Each user instruction issues the mobile certain length of rear holder, and direction, which is presented as, adds and subtracts certain length, is read by software
It takes the register of camera unit that can accurately learn the position of holder, the expection target point to be moved to is calculated, passes through road
Diameter planning algorithm obtains movement routine；
After the completion of path planning, step cycle can be formed by increasing transition point；Pass through each Moving Unit stepping length
Scheme is constantly updated, and is advanced to target position, is finally exactly that picture changes with the rotation of holder on user experience.
8. the method according to claim 5 for realizing cloud platform rotation based on image cropping, which is characterized in that the high-resolution
The resolution ratio of rate sensor is more than or equal to 2 times of the target resolution of camera unit output.
9. the method according to claim 5 for realizing cloud platform rotation based on image cropping, which is characterized in that shown camera shooting is single
Member is gun-shaped video camera or traditional-family's video camera.
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Application publication date: 20190712 |