CN106202801B - Target motion smear emulation mode in a kind of space-based optical space fragment monitoring picture - Google Patents
Target motion smear emulation mode in a kind of space-based optical space fragment monitoring picture Download PDFInfo
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- CN106202801B CN106202801B CN201610584732.9A CN201610584732A CN106202801B CN 106202801 B CN106202801 B CN 106202801B CN 201610584732 A CN201610584732 A CN 201610584732A CN 106202801 B CN106202801 B CN 106202801B
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Abstract
The invention discloses target motion smear emulation mode in a kind of space-based optical space fragment monitoring picture, include the following steps: that (1) obtains move distance pixel number of the spatial movement fragment within the given time of integration in imaging detector image planes；(2) according to move distance pixel number, an area image is established；The pixel that the pixel that fragment motion smear passes through on the area image, as the fragment motion smear are resident in time of integration Δ T；(3) each pixel for being resident fragment hangover on imaging surface is as a sub-goal, by each sub-goal RiA diffusion simulations are carried out according to Gauss model；(4) region of energy supposition between the diffusion of adjacent sub-goal Gauss point is added, simulates movement fragment hangover；Target motion smear emulation mode in space-based optical space fragment monitoring picture provided by the invention, has that energy simulation model is accurate, the advantages of under fragment targeted cache moving condition being not in breakpoint.
Description
Technical field
The invention belongs to space-based optical imagery simulation technical fields, more particularly, to a kind of space-based optical space fragment
Target motion smear emulation mode in monitoring picture.
Background technique
Space-based optical space fragment monitoring picture, which refers to, uses the space image of day based optical systems shooting in exoatmosphere,
Since imaging process is not influenced by atmosphere, cloud layer scattering and atmospheric attenuation, without the system of ground based observa tion platform geographical location deployment
It about, is one of the main means for obtaining spatial movement fragment information.In recent years, many space junk optical imaging probes also land
It is continuous to succeed in developing and come into operation, such as: space-based visible sensor (SBV), the European Space Situation Awareness System in the U.S.
(ESSAS), Canadian terrestrial space surveillance satellite (NESS).Due to spatial movement fragment in space mainly by the anti-of the sun
Penetrating can just be captured by a camera, and shooting distance is farther out, so energy is faint, spatial movement fragment is on optical system imaging face
The form of expression is point target.In the space-based optical imaging system design phase, the design and verifying of all information processing algorithms are all
The image not shot really can only be verified as data source by emulating image.Therefore, it is based on space-based optical imagery
The spatial movement fragment monitoring picture emulation technology of system is occupied very heavy in the design and manufacture of spatial visualization sensor
The status wanted.
The imaging process of space junk optical imagery is by optical system parameter, image device noise, time for exposure, celestial sphere
Influence of the coordinate to factors such as transformation, the target angular velocity of satellite motion of sensor coordinates.Therefore, space junk optical imagery emulates skill
Art is faced with many problems.Existing study concentrates on star sensor star chart emulation technology, but the star motions in star sensor
Angular speed is relatively low, is not particularly suited for the space junk hangover emulation of high-speed motion, can generate breakpoint and form wrong hangover；
The method for solving the problems, such as simulation space high-speed motion fragment point target monitoring picture is less, for U.S.'s space-based visible sensor
(SBV) tail energy simulation model that Space Target Surveillance image simulation method is proposed is simultaneously inaccurate；It is some for static
Extraterrestrial target emulation mode, there is no consider target movement caused by smearing effects.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of monitoring of space-based optical space fragment
Target motion smear emulation mode in image, its object is to the smearings to space high-speed motion fragment to emulate.
To achieve the above object, according to one aspect of the present invention, a kind of space-based optical space fragment watch circle is provided
The target motion smear emulation mode as in, includes the following steps:
(1) move distance picture of the spatial movement fragment within the given time of integration in imaging detector image planes is obtained
Element；
(2) according to move distance pixel, (a M is establishedX,MY) pixel size area image；Fragment motion smear is at this
The pixel that the pixel passed through on area image, as the fragment motion smear are resident in time of integration Δ T；
Wherein, Δ T=T/N, N refer to the number of pixels that fragment motion smear passes through on area image；
(3) regard each pixel that fragment hangover is resident on imaging surface as a sub-goal, by each sub-goal Ri
A diffusion simulations are carried out according to Gauss model；
(4) region of energy supposition between the diffusion of adjacent sub-goal Gauss point is added, simulates movement fragment hangover.
Preferably, target motion smear emulation mode in above-mentioned space-based optical space fragment monitoring picture, space junk exist
Move distance pixel number in image planes is respectively MX、MY；MX=VX·T/P；
MY=VY·T/P；
Wherein, T is the given time of integration, VXRefer to angular velocity of satellite motion V (degrees second) of the fragment on imaging surface in the side X
Upward angular velocity component, Vy(degrees second) refers to angular velocity of satellite motion V angular speed in the Y direction of the fragment on imaging surface point
Amount.
Preferably, target motion smear emulation mode in above-mentioned space-based optical space fragment monitoring picture, step (3) tool
Body is, by each sub-goal RiA diffusion simulations are carried out according to following Gauss model
Wherein, σ refers to the size of Gauss disperse spot size, and Φ refers to that space junk is in camera imaging in time of integration Δ T
Energy on face, i=1,2,3..., N.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
In existing spatial movement fragment optical imagery emulation technology, it is imitative to lack effective spatial movement fragment smearing
True method；It is imitative to have energy for target motion smear emulation mode in space-based optical space fragment monitoring picture provided by the invention
True mode is accurate, the advantages of under fragment targeted cache moving condition being not in breakpoint；The day obtained using the emulation mode
Spatial movement fragment smearing in base optical imagery is suitable for the information processing of supporting and space visible sensor.
Detailed description of the invention
Fig. 1 is the target motion smear area image schematic diagram in the embodiment of the present invention；
Fig. 2 is the continuous Gaussian disc of confusion schematic diagram in the embodiment of the present invention；
Fig. 3 is the energy envelope area schematic in the embodiment of the present invention；
Fig. 4 is the extraterrestrial target hangover emulation schematic diagram of the high angular velocity of satellite motion in the embodiment of the present invention；
Fig. 5 is the simulation of space debris image schematic diagram in the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Target motion smear emulation mode in the space-based optical space fragment monitoring picture that embodiment provides, including walk as follows
It is rapid:
(1) high-speed motion fragment smearing area image is constructed；Construct obtained target motion smear area image such as
Shown in Fig. 1, the row and column number of area image respectively represent high-speed motion fragment target space-based optical system imaging face X-axis with
Movement pixel number in Y direction；Each lattice represents a pixel, and the square of black represents extraterrestrial target in the picture
A period of time Δ t is resided at plain position, thinks that extraterrestrial target point is a static target in this Δ t period；
(2) continuous Gaussian disc of confusion is constructed；It is as shown in Figure 2 to construct obtained continuous Gaussian disc of confusion, wherein each black
The electronics that the gross energy Φ for the static sub-goal that square represents is generated on resident pixel in time of integration Δ t as the target
Number；
(3) energy of cumulative Gauss disc of confusion overlapping region；
Gaussian Energy diffusion zone hair by taking label in Fig. 2 is respectively pixel 1. and 2. as an example, between the two pixels
Overlapping is given birth to；Since space junk itself does not shine, the reflection for fully relying on sunlight can be visited by day based optical systems
It measures, therefore can be simulated according to the asterism model under the conditions of ideal image；
Fig. 3 is comprising the point target 1. exemplary diagram region M with point target 2., wherein 1. and 2. respectively with 3 × 3 pixel sizes
Gauss asterism model indicate that and guarantee that their central energy accounts for 60% or more of fixed star point gross energy, they are in administrative division map
As the position on M is respectively M (xi, yj), i=1,2,3j=4,5,6 and M (xm,yl), m=2,3,4l=3,4,5；
Point target 1. and point target 2. between there are the energy envelope regions of four pixels, be located at M (2,5), M (3,
5), (2,4) M, it is at four pixels of M (3,4), the energy of the point target 1. pixel overlapping region with point target 2. is all cumulative
Afterwards, M'(2 is assigned to as new pixel energy, 5), M'(3,5) and, M'(2,4), M'(3,4) and, obtain the picture of final overlapping region
First energy；
(4) the Gauss disperse spot region of adjacent all energy envelopes shown in Fig. 2 is subjected to energy accumulation, obtains Fig. 4 institute
Simulation objectives smearing after the linear fit shown, the moving target in Fig. 4 assume the center for being initially positioned in image, and to
The lower right corner moves rapidly, and final one hangover of formation on the image.
The energy under the conditions of ideal image has been fully considered using the smearing that the emulation mode that embodiment provides obtains
Distribution, and do not influenced by target angular velocity of satellite motion in simulation process, breakpoint will not be generated and emulate the hangover that makes mistake；It will
It emulates obtained high-speed moving object hangover to be put into the star background analogous diagram for being added to imaging noise, obtain such as Fig. 5 institute
The space junk optical simulation image shown, the emulating image in Fig. 5 fully consider the influence factor of space-based optical platform imaging, packet
Imaging noise is included, unsaturation fixed star asterism is saturated the hangover that fixed star asterism and the space junk quickly moved generate, connects substantially
Nearly true optical imagery, can provide data supporting for the research of space junk detection method.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (3)
1. target motion smear emulation mode in a kind of space-based optical space fragment monitoring picture, which is characterized in that including as follows
Step:
(1) move distance pixel number of the spatial movement fragment within the given time of integration in imaging detector image planes is obtained；
(2) according to move distance pixel number, (a M is establishedX,MY) pixel size area image；Fragment motion smear is in the area
The pixel that the pixel passed through on area image, as the fragment motion smear are resident in time of integration Δ T；
Wherein, Δ T=T/N, N refer to the number of pixels that fragment motion smear passes through on area image；
(3) each pixel for being resident fragment hangover on imaging surface is as a sub-goal, by each sub-goal RiAccording to height
This model carries out a diffusion simulations；
(4) region of energy supposition between the diffusion of adjacent sub-goal Gauss point is added, simulates movement fragment hangover.
2. target motion smear emulation mode in space-based optical space fragment monitoring picture as described in claim 1, feature
It is, move distance pixel number of the space junk in image planes is respectively MX、MY；MX=VX·T/P；MY=VY·T/P；
Wherein, T is the given time of integration, VXRefer to the angular speed of angular velocity of satellite motion of the fragment on imaging surface in the X direction point
Amount, VyRefer to the angular velocity component of angular velocity of satellite motion of the fragment on imaging surface in the Y direction.
3. target motion smear emulation mode in space-based optical space fragment monitoring picture as claimed in claim 2, feature
It is, the step (3) is specifically, by each sub-goal RiA diffusion simulations are carried out according to following Gauss model, so that
Wherein, σ refers to the size of Gauss disperse spot size, and Φ refers to that space junk is on camera imaging face in time of integration Δ T
Energy, i=1,2,3..., N.
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| CN107449416B (en) * | 2017-06-20 | 2019-09-03 | 中国人民解放军国防科学技术大学 | Fixed star hangover asterism extracting method based on vector accumulation |
| CN108917632B (en) * | 2018-05-15 | 2020-06-02 | 河北工程大学 | High-efficiency high-precision digital image correlation displacement post-processing method |
| CN116432402B (en) * | 2023-03-08 | 2023-10-27 | 中国科学院紫金山天文台 | Full-link closed-loop space debris optical observation simulation system |
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| CN104217070A (en) * | 2014-08-26 | 2014-12-17 | 上海微小卫星工程中心 | Imaging simulation method and device for space-based space target |
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| CN104217070A (en) * | 2014-08-26 | 2014-12-17 | 上海微小卫星工程中心 | Imaging simulation method and device for space-based space target |
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| Title |
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| 天基光学成像系统空间目标成像模拟技术;杨长才等;《红外与激光工程》;20120930;第41卷(第9期);第2410-2414页 |
| 天基光学空间目标监视图像仿真研究;李骏等;《系统仿真学报》;20080831;第20卷(第15期);第2-5节，图4 |
| 空间目标天基光学观测系统建模与探测能力分析;蓝朝桢;《中国博士学位论文全文数据库 基础科学辑》;20121215;A007-1 |
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