CN104580895A - Airborne imaging system with synchronous camera shooting and photographing capacity - Google Patents
Airborne imaging system with synchronous camera shooting and photographing capacity Download PDFInfo
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Abstract
An airborne imaging system with synchronous camera shooting and photographing capacity comprises a motorized zoom lens, an imaging sensor, a power module, a signal processing module, an interface module, a storage module and an image compression module, wherein a sensor module images a target scene through the motorized zoom lens, converts an optical signal into a digital signal and transmits the digital signal to the signal processing module, and the signal processing module receives and processes the digital signal and then transmits the signal to a compression module; the compression control module transmits the received signal to the image compression module, and the image compression module performs image compression on the received signal according to a compression control instruction and then outputs the signal to the storage module for storage; and the signal processing module receives an external instruction through an UART (universal asynchronous receiver/transmitter) communication interface connected with the interface module and sends the external instruction to the control module. Functions of the system meet function requirements of an electric-optic turret for camera shooting and photographing equipment, the size and the power consumption of the equipment are effectively reduced, the design difficulty of the electric-optic turret is reduced, and the working efficiency of the electric-optic turret is improved.
Description
Technical field
The present invention relates to a kind of airborne imaging system, particularly a kind of have the airborne imaging system taken the photograph according to synchronous working ability, be mainly used in airborne photoelectric turret system to use, the major function of equipment covers the instructions for use of airborne Electric-Optic Turret system to visible light camera and wide battle array camera as seen completely, belongs to airborne imaging equipment field.
Background technology
Airborne photoelectric capstan head equipment is mainly used in scouting target area, searches for, identifies and track and localization specific objective.Visible light camera and visible light camera are the crucial load of airborne photoelectric capstan head.Existing airborne photoelectric capstan head equipment is generally equipped with visible light camera and visible light camera two kinds of load respectively, the instructions for use obtained with realize target search and high resolution picture, but this mode exists following problem:
Airborne, especially unmanned aerial vehicle onboard capstan head equipment is a kind of to the extremely sensitive equipment of volume, weight and power consumption, outfit visible light camera and camera occupy valuable space respectively, have impact on the installation of other payload, limit the Function of Electric-Optic Turret;
Electric-Optic Turret equips visible light camera and camera respectively, needs the difference of consideration two kinds of load data interfaces, command system and mounting meanss, more difficultly brings, also improve cost to the design of Electric-Optic Turret transfer of data, storage system;
The difference of video camera and camera gun, makes both be difficult to keep the work of same visual field, not only brings difficulty to design, also there is many restrictions in use procedure.
Summary of the invention
The technical problem that the present invention solves is: overcome the deficiencies in the prior art, provides a kind ofly to have the airborne imaging system taken the photograph according to synchronous working ability, integrates visible image capturing, visible ray high-resolution camera function.Native system be operated in take the photograph according under one pattern time, taking pictures and make a video recording can synchronous working, and keeps same visual field completely.And there is abundant external interface, the functional units such as built-in compression, storage, image enhaucament, Penetrating Fog, compare existing equipment, integrated level improves greatly.Native system function meets Electric-Optic Turret to shooting and the functional requirement of photographing device, effectively reduces equipment volume, power consumption, reduces the design difficulty of Electric-Optic Turret equipment, improve the operating efficiency of Electric-Optic Turret equipment.
Technical solution of the present invention is: a kind of have the airborne imaging system taken the photograph according to synchronous working ability, comprising: motorized zoom lens, imaging sensor, power module, signal processing module, interface module, memory module and image compression module;
Sensor assembly carries out imaging by electronic zoom camera lens to target scene, and transfers to signal processing module after optical signalling is converted to digital signal;
Described signal processing module comprises: 3A algoritic module, Electronic magnification module, Penetrating Fog and low-light (level) strengthen module, imaging sensor control module, lens control module, storage drive module, control module, compression control module and UART;
Signal processing module receives digital signal to carry out becoming full resolution image signal after automatic gain, Automatic white balance and automatic exposure process through 3A algoritic module, full resolution image signal is divided into two paths of signals, wherein a road signal directly inputs to Penetrating Fog and low-light (level) strengthens module, another road signal inputs to Penetrating Fog after Electronic magnification module carries out being transformed to low resolution video signal after Electronic magnification and low-light (level) strengthens module
Penetrating Fog and low-light (level) strengthen module and dock the full resolution image signal that receives and low resolution video signal and carry out after Penetrating Fog and low-light (level) strengthen and process, all send picture signal and processing signals to interface module, and by picture signal or video signal transmission to compression module;
Compression control module by the picture signal that receives or vision signal and compression control command to image compression module, image compression module exports to storage drive module after carrying out image compression according to compression control instruction to the picture signal received or vision signal, storage drive module controls memory module, stores the picture signal after compression or vision signal;
Signal processing module is received external command by the UART communication interface be connected with interface module and is sent to control module, and control module is according to each functional module work of the external command control signal processing module received;
Imaging sensor control module in signal processing module and lens control module are controlled to image-position sensor and electronic zoom camera lens respectively, arrange image forming job pattern;
Power module powers to respectively motorized zoom lens, imaging sensor, signal processing module, interface module, memory module and image compression module.
Described interface module comprises: a Cameralink interface, the 2nd Cameralink interface, RS422 interface, PAL interface and URAT interface, one Cameralink interface is for exporting full resolution image signal, 2nd Cameralink interface is for exporting low-resolution video digital signal, PAL interface is for exporting low-resolution video analog signal, RS422 interface is used for communicating with external control unit outside, and URAT interface is used for being connected with the UART interface of signal processing module.
Described airborne imaging system comprises three kinds of mode of operations, is respectively: exposal model, video imaging pattern and taking pictures to synchronous working pattern with video imaging.
The resolution of described full resolution image signal is 5120*5120, and the resolution of low resolution video signal is for being less than or equal to 1024*1024.
Under described video imaging synchronous working pattern, during electronic zoom lens imaging, the excursion of focal length is: 40mm-130mm.
Under described exposal model, airborne imaging system differentiates photo entirely with the rate-adaptive pacemaker of 4 frames/S, under described video imaging pattern, airborne imaging system is with the rate-adaptive pacemaker video of 30 frames/S, under described video imaging synchronous working pattern, airborne imaging system with the rate-adaptive pacemaker full resolution photo of 4 frames/S, simultaneously with the rate-adaptive pacemaker of 30 frames/S and full resolution photo completely with the video of visual field.
Described Electronic magnification module has 1-5 Electronic magnification function doubly, the shortest burnt time observation visual field maximum be: 60 ° × 60 °, when most focal length, observation visual field maximum is: 10 ° × 10 °.
Sum up the above, the present invention has the following advantages:
(1) the present invention be integrated with in single device full resolution take pictures and low-resolution video obtain functional mode, and two kinds of functions can be realized work simultaneously, improve the service efficiency of equipment, when being applied to Electric-Optic Turret, decrease number of devices, by taking pictures, within the visual light imaging load weight of video imaging two functions has been reduced to 1.7kg, and improve the reliability of Electric-Optic Turret;
(2) low resolution video signal and full resolution image signal synchronism output in the present invention, at any time, vision signal and picture signal all have identical visual field, can be followed the tracks of by low resolution video signal realize target and locate, and pass through the detailed information of full resolution image signal acquisition target and surrounding enviroment.To eliminate in prior art the switching of vision signal and picture signal and visual field matching operation, improve imaging efficiency;
(3) the present invention adopts optical zoom and Electronic magnification to combine, achieve the zoom of maximum 32.5 times, and multiple change each time all brings details to enrich the change of degree, zoom effect is identical with optical zoom, maximum 60 ° × 60 ° can be realized, the visual field change of minimum 2 ° × 2 °;
(4) Penetrating Fog of the inner integrated optimization of the present invention and low-light (level) strengthen algoritic module, carry out Penetrating Fog process and low-light (level) strengthens process to view data and video data, improve the quality of view data and video data, improve the environmental suitability of equipment;
(5) the compression memory module that the present invention is built-in improves device integration, effectively can reduce the cost of Electric-Optic Turret.
Accompanying drawing explanation
Fig. 1 is present system theory diagram;
Fig. 2 is present system high-level schematic functional block diagram.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, embodiments of the present invention are described in further detail.
Be illustrated in figure 1 present system theory diagram, Figure 2 shows that present system high-level schematic functional block diagram.From Fig. 1 and Fig. 2, provided by the invention a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that comprising: motorized zoom lens, imaging sensor, power module, signal processing module, interface module, memory module and image compression module;
Sensor assembly carries out imaging by electronic zoom camera lens to target scene, and transfers to signal processing module after optical signalling is converted to digital signal,
Described signal processing module comprises: 3A algoritic module, Electronic magnification module, Penetrating Fog and low-light (level) strengthen module, imaging sensor control module, lens control module, storage drive module, control module, compression control module and UART;
Signal processing module receives digital signal to carry out becoming full resolution image signal after automatic gain, Automatic white balance and automatic exposure process through 3A algoritic module, described 3A algorithm is specifically shown in: Song Qiudong, Lin Qiuyue, Liu Huitong etc., " CCD camera auto gain control method and realization based on FPGA ", infrared and laser engineering, 2002.10, Vol.35Supplement and Zheng Zhourong, He Jie, Hong Zhiliang, " adaptive Algorithm of Auto White Balance for Digital Camera ", computer-aided design and graphics journal, 2005.03, Vol.17, No.3.
Full resolution image signal is divided into two paths of signals, wherein a road signal directly inputs to Penetrating Fog and low-light (level) strengthens module, another road signal inputs to Penetrating Fog after Electronic magnification module carries out being transformed to low resolution video signal after Electronic magnification and low-light (level) strengthens module, the resolution of described full resolution image signal is 5120*5120, and the resolution of low resolution video signal is for being less than or equal to 1024*1024; Described Electronic magnification module has 1-5 Electronic magnification function doubly, the shortest burnt time observation visual field maximum be: 60 ° × 60 °, when most focal length, observation visual field maximum is: 10 ° × 10 °;
Penetrating Fog and low-light (level) strengthen module and dock the full resolution image signal that receives and low resolution video signal and carry out after Penetrating Fog and low-light (level) strengthen and process, all send picture signal and processing signals to interface module, and by picture signal or video signal transmission to compression module; Described Penetrating Fog and low-light (level) strengthen process and specifically see: He, K., Sun, J., Tang, X., " Single image haze removal using dark channel prior " .CVPR (2009)
Compression control module by the picture signal that receives or vision signal and compression control command to image compression module, image compression module exports to storage drive module after carrying out image compression according to compression control instruction to the picture signal received or vision signal, storage drive module controls memory module, stores the picture signal after compression or vision signal;
Signal processing module is received external command by the UART communication interface be connected with interface module and is sent to control module, and control module is according to each functional module work of the external command control signal processing module received;
Described interface module comprises: a Cameralink interface, the 2nd Cameralink interface, RS422 interface, PAL interface and URAT interface, wherein Cameralink interface chip is DS90CR285MTD, one Cameralink interface is for exporting full resolution image signal, 2nd Cameralink interface is for exporting low-resolution video digital signal, PAL interface is for exporting low-resolution video analog signal, RS422 interface is used for communicating with external control unit outside, and URAT interface is used for being connected with the UART interface of signal processing module;
Imaging sensor control module in signal processing module and lens control module are controlled to image-position sensor and electronic zoom camera lens respectively, arrange image forming job pattern;
Power module powers to respectively motorized zoom lens, imaging sensor, signal processing module, interface module, memory module and image compression module.
Described airborne imaging system comprises three kinds of mode of operations, is respectively: exposal model, video imaging pattern and taking pictures to synchronous working pattern with video imaging, specific works process is:
Exposal model: interface module receives photographing instruction by RS422 communication interface, and the mode of operation getting camera arranges instruction, then signal processing unit obtains instruction by UART interface, instruction is resolved by control unit, extract imaging parameters information, and be arranged to the mode of operation of image-position sensor accordingly, the full resolution image data message that signal processing unit pick-up transducers exports, respectively sends into compression storage control unit after carrying out Penetrating Fog and low-light (level) enhancing process according to instruction and external interface unit exports.
Video imaging pattern: interface module receives video imaging instruction by RS422 communication interface, and get video imaging mode of operation simultaneously and instruction is set, then signal processing unit is by the initial parameter value such as gain, time for exposure of module installation imaging sensor, by view data through 3A algoritic module, obtain imaging parameters, and be configured to image-position sensor accordingly.After Electronic magnification module obtains the full resolution image data of 30 frames/S, view data is carried out down-sampling, resolution is reduced to 1024*1024, and keep former frame frequency to export to image Penetrating Fog and low-light (level) strengthens module, process and carried out further compressing according to instruction afterwards, store and the operation such as output.
Take pictures and to synchronous working pattern with video imaging: interface module is received by RS422 communication interface to be taken the photograph according to synchronous working instruction, signal processing unit is obtained by UART module and is resolved after instruction by control module, by imaging sensor control module, imaging sensor is set as 30 frames/second, and acquisition of image data, be arranged to image-position sensor operating state according to the imaging parameters that external command or 3A module obtain.Full resolution image data regularly or according to external trigger signal are sent into low-light (level) enhancing and Penetrating Fog processing module by control module control 3A module, and the full resolution image data processed send into compression, storage control module.Full resolution image data are sent into Electronic magnification module simultaneously, the high frame rate data of 1024 × 1024 after zoom (it is then 720*576 that Phase Alternation Line system exports) resolution are sent into low-light (level) strengthen and Penetrating Fog module, the data processed export through the 2nd Cameralink or PAL interface.While above work, the potentiometer voltage value returned when the lens control module in signal processing unit reads lens zoom in real time, obtains the focal length residing for camera lens by magnitude of voltage, and is limited between 40mm-130mm by focal length.
Under described exposal model, airborne imaging system differentiates photo entirely with the rate-adaptive pacemaker of 4 frames/S, under described video imaging pattern, airborne imaging system is with the rate-adaptive pacemaker video of 30 frames/S, under described video imaging synchronous working pattern, airborne imaging system with the rate-adaptive pacemaker full resolution photo of 4 frames/S, simultaneously with the rate-adaptive pacemaker of 30 frames/S and full resolution photo completely with the video of visual field.
Claims (7)
1. there is the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that comprising: motorized zoom lens, imaging sensor, power module, signal processing module, interface module, memory module and image compression module;
Sensor assembly carries out imaging by electronic zoom camera lens to target scene, and transfers to signal processing module after optical signalling is converted to digital signal,
Described signal processing module comprises: 3A algoritic module, Electronic magnification module, Penetrating Fog and low-light (level) strengthen module, imaging sensor control module, lens control module, storage drive module, control module, compression control module and UART;
Signal processing module receives digital signal to carry out becoming full resolution image signal after automatic gain, Automatic white balance and automatic exposure process through 3A algoritic module, full resolution image signal is divided into two paths of signals, wherein a road signal directly inputs to Penetrating Fog and low-light (level) strengthens module, another road signal inputs to Penetrating Fog after Electronic magnification module carries out being transformed to low resolution video signal after Electronic magnification and low-light (level) strengthens module
Penetrating Fog and low-light (level) strengthen module and dock the full resolution image signal that receives and low resolution video signal and carry out after Penetrating Fog and low-light (level) strengthen and process, all send picture signal and processing signals to interface module, and by picture signal or video signal transmission to compression module;
Compression control module by the picture signal that receives or vision signal and compression control command to image compression module, image compression module exports to storage drive module after carrying out image compression according to compression control instruction to the picture signal received or vision signal, storage drive module controls memory module, stores the picture signal after compression or vision signal;
Signal processing module is received external command by the UART communication interface be connected with interface module and is sent to control module, and control module is according to each functional module work of the external command control signal processing module received;
Imaging sensor control module in signal processing module and lens control module are controlled to image-position sensor and electronic zoom camera lens respectively, arrange image forming job pattern;
Power module powers to respectively motorized zoom lens, imaging sensor, signal processing module, interface module, memory module and image compression module.
2. according to claim 1 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: described interface module comprises: a Cameralink interface, 2nd Cameralink interface, RS422 interface, PAL interface and URAT interface, one Cameralink interface is for exporting full resolution image signal, 2nd Cameralink interface is for exporting low-resolution video digital signal, PAL interface is for exporting low-resolution video analog signal, RS422 interface is used for communicating with external control unit outside, URAT interface is used for being connected with the UART interface of signal processing module.
3. according to claim 1 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: described airborne imaging system comprises three kinds of mode of operations, is respectively: exposal model, video imaging pattern and taking pictures to synchronous working pattern with video imaging.
4. according to claim 1 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: the resolution of described full resolution image signal is 5120*5120, and the resolution of low resolution video signal is for being less than or equal to 1024*1024.
5. according to claim 3 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: under described video imaging synchronous working pattern, during electronic zoom lens imaging, the excursion of focal length is: 40mm-130mm.
6. according to claim 3 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: under described exposal model, airborne imaging system differentiates photo entirely with the rate-adaptive pacemaker of 4 frames/S, under described video imaging pattern, airborne imaging system is with the rate-adaptive pacemaker video of 30 frames/S, under described video imaging synchronous working pattern, airborne imaging system with the rate-adaptive pacemaker full resolution photo of 4 frames/S, simultaneously with the rate-adaptive pacemaker of 30 frames/S and full resolution photo completely with the video of visual field.
7. according to claim 1 a kind ofly have the airborne imaging system taken the photograph according to synchronous working ability, it is characterized in that: described Electronic magnification module has 1-5 Electronic magnification function doubly, the shortest burnt time observation visual field maximum be: 60 ° × 60 °, when most focal length, observation visual field maximum is: 10 ° × 10 °.
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| CN106572288A (en) * | 2016-10-19 | 2017-04-19 | 广东容祺智能科技有限公司 | Unmanned aerial vehicle image transmission integrated camera |
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