CN105973469B - UAV system high spectrum image survey meter and method with synchrotron radiation correction - Google Patents
UAV system high spectrum image survey meter and method with synchrotron radiation correction Download PDFInfo
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- CN105973469B CN105973469B CN201610320750.6A CN201610320750A CN105973469B CN 105973469 B CN105973469 B CN 105973469B CN 201610320750 A CN201610320750 A CN 201610320750A CN 105973469 B CN105973469 B CN 105973469B
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- 230000005469 synchrotron radiation Effects 0.000 title claims abstract description 17
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 4
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
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- G01J3/2823—Imaging spectrometer
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- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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Abstract
The present invention discloses a kind of push-broom type UAV system high spectrum image survey meter with synchrotron radiation correction, enter the image processor of row data communication including target optical spectrum image detector and with the target optical spectrum image detector, the target optical spectrum image detector includes phtographic lens, spectrum light splitter and image detector, the spectrum light splitter one end setting signal collection slit relative with the phtographic lens, also include referring to light collector and curved reflector, the unobstructed place in top that the unmanned plane is arranged at reference to light collector, the curved reflector is arranged at one end of the signal acquisition slit of the spectrum light splitter.Meanwhile the present invention also provides a kind of detection method of the push-broom type UAV system high spectrum image survey meter of synchrotron radiation correction.Real time correction detection data of the present invention deviates, and is advantageous to significantly improve data operation accuracy, be particularly suitable for radiation condition it is changeable in the case of UAV system high spectrum image push away and sweep detection.
Description
Technical field
The present invention relates to a kind of push-broom type UAV system high spectrum image survey meter, a kind of synchrotron radiation is more particularly related to
The push-broom type UAV system high spectrum image survey meter of correction, belongs to spectrum picture detection technology field.
Background technology
High spectrum image Detection Techniques, it is the key technology of modern age remote sensing, has and contain much information, detectivity is high, visits
The advantages that abundant in content is surveyed, the trace of the faint or recessive composition of target area can be detected, its operation principle is:Object is voluntarily
After lighting or being radiated by outside energy, the light such as fluorescence, reflection, absorption, transmission, refraction light are sent according to the characteristic of respective material
Spectrum, radiated to surrounding space, hyperspectral imager is mounted on unmanned plane, with unmanned plane during flying direction, vertically earthward, over the ground
Area Objects, which push away, sweeps detection, gathers these radiation spectrum information, by the contrast computing with radiation source, parses target
Characteristic spectrum information, the reflectivity calculation of sample are:
K=kc(Io-Da)/ Ic-Db,
Wherein K--- reflectivity, kc--- radiation of light source correction factors, Io--- sample light intensity, Da--- target detectors are dark
Current noise value, Db--- ray detector dark current noise values, Ic--- light source intensities.And in above-mentioned parameter, Ic is by light source
After reference detector completes collection, it is stored in message handler, when carrying out sample reflectance analysis, then extracts this data.
In the airborne detect operation of reality, signal that imaging spectrometer receives, mainly target component is by sunlight and day
The integrated signal given off after light irradiation.However, working as can be influenceed as the sunlight or the daylight of light source by weather and time, produce
When raw intensity and wavelength change, the radiant light of target photographed object also synchronously changes, thus causes the larger inclined of detection data
From.Deviate to correct this radiation, the correction method of generally use insertion reference plate and additional independent radiometer, these methods are equal
It is cumbersome in the presence of such as structure, the defects of the deficiencies of correction accuracy difference.
The content of the invention
Goal of the invention:Present invention aims in view of the shortcomings of the prior art, there is provided one kind can be changeable in lighting condition
In the environment of avoid detection data from deviateing, it is ensured that the push-broom type UAV system high spectrum image of high correction accuracy synchrotron radiation correction
Survey meter.
Meanwhile the present invention also provides a kind of push-broom type UAV system EO-1 hyperion of the synchrotron radiation correction to solve the above problems
The detection method of image detection instrument.
Technical scheme:First technical scheme provided by the invention be:It is a kind of with synchrotron radiation correction push-broom type nobody
Airborne hyperspectral image detection instrument, including target optical spectrum image detector and with the target optical spectrum image detector carry out data
The image processor of communication, the target optical spectrum image detector include phtographic lens, spectrum light splitter and image detector, institute
The spectrum light splitter one end setting signal collection slit relative with the phtographic lens is stated, in addition to refers to light collector and curved surface
Speculum, the unobstructed place in top that the unmanned plane is arranged at reference to light collector, the curved reflector are arranged at institute
One end of the signal acquisition slit of spectrum light splitter is stated, the optical signal with reference to light collector passes through fiber optic conduction to the song
The concave surface of face speculum, through the curved reflector and focus on the end of the signal acquisition slit of the spectrum light splitter
Portion.
The technical program is further defined to, it is described with reference to light collector be with cosine correct and to light source direction not
Sensitive collector.
Another technical scheme provided by the invention is:Push-broom type UAV system high spectrum image with synchrotron radiation correction is visited
Survey the detection method of instrument, it is characterised in that step is as follows:
S1, target optical spectrum image detector phtographic lens collection target image optical signal, and by target image optical signal
It is sent at signal acquisition slit;
Meanwhile reference optical signal is gathered with reference to light collector, and the reference optical signal is sent to the spectrum
At the signal acquisition slit of device;
Above two optical signal is arranged side by side but does not mix, while projects at collection slit;
S2, target image optical signal and reference optical signal are sent to spectrum light splitter by signal acquisition slit simultaneously, will
Signal is blended into same picture frame after image detector incoming image processor and just stored;
In picture frame, target image optical signal and reference optical signal respectively occupy fixed region;
S3, when carrying out data processing, open picture frame, extract destination image data and reference from corresponding position respectively
Light data, directly handled.
The technical program is further defined to, and extracts target image optical signal in step S3 and reference optical signal is direct
When being handled, the calculation to target sample reflectivity is:
K=Io-D/aIc-D,
Wherein, Io is target image light signal strength, and Ic is reference optical signal intensity, and a is that reference light imports coefficient, D
For detector dark current noise figure.
Further, also comprise the following steps:Area is taken to set up region of interest ROI in reference light, to area-of-interest
ROI reference optical signal is monitored in real time, and according to the change of the region light intensity, feedback data is provided for data processor, number
According to processor adjust automatically target optical spectrum image detector(2)Parameter, the collection to target image optical signal realizes dynamic spoke
Penetrate correction.
Beneficial effect:(1)The push-broom type UAV system high spectrum image survey meter of synchrotron radiation correction provided by the invention
And method, target image optical signal and reference optical signal are recorded in same detector simultaneously, realize synchronizing detection, it is synchronous
Storage, therefore the different kinds of parameters such as its light exposure, dark current noise value, camera temperature characterisitic, detection time is all consistent, avoids detecting
Data deviate, synchronous acquisition and utilization with particular reference to light, avoid largely caused by climate change detecting error and
Environmental condition limits to influence to detection accuracy, and it is accurate to be advantageous to data operation, is particularly suitable for high density wave band EO-1 hyperion
Collection is swept in pushing away for picture signal;
(2)Target image optical signal and reference optical signal are recorded in same image data file by this method, remove text from
The operation of part matching, saves data space, simplifies processing routine, is advantageous to quick or even online real-time operation processing;
(3)Target image optical signal detection and reference optical signal are detected and share same signal transmission line by the present invention,
Number of parts has been simplified, has reduced equipment volume, has improved integrated level;
(4)The present invention realizes the auto-exposure control of target image collection, reaches spectrum picture detection Dynamic radiation correction
Purpose.
Brief description of the drawings
Fig. 1 is that the structure of the push-broom type UAV system high spectrum image survey meter of synchrotron radiation provided by the invention correction is shown
It is intended to;
Fig. 2 is the schematic diagram that target image optical signal provided by the invention and reference optical signal occupy region in slit.
Embodiment
Technical solution of the present invention is described in detail below by accompanying drawing, but protection scope of the present invention is not limited to
The embodiment.
Embodiment 1:The present embodiment provides a kind of push-broom type UAV system high spectrum image survey meter of synchrotron radiation correction,
Its structural representation as shown in figure 1, including with reference to light collector 1, target optical spectrum image detector 2, curved reflector 6 and with institute
State the image processor that target detector 2 enters row data communication.
Target optical spectrum image detector 2 is conventional target optical spectrum image detector, including phtographic lens 3, spectrum
Device 4 and image detector 5, the spectrum light splitter 4 one end setting signal collection slit 7 relative with the phtographic lens 3, this
Slit is hollow out or above covers transparent medium, and medium can use glass or resin, can be selected according to being actually needed
Select.
With reference to light collector 1 be with cosine correction and the collector insensitive to light source direction, be arranged at it is described nobody
The unobstructed place in top of machine, gathers reference optical signal in real time.
Because the signal acquisition slit 7 of spectrum light splitter 4 is very tiny, and refer to the conduction fiber end face of light collector 1
Structure is larger, if reference optical signal directly is close into slit 7, direct-coupling, it will blocks target imaging light letter adjacent thereto
Number, therefore, the present embodiment employs curved reflector 6, and curved reflector 6 is obliquely installed in the signal of the spectrum light splitter 4
Gather one end of slit 7, its concave surface face signal acquisition slit 7.The position setting of curved reflector 6 needs to adjust by accurate
It is whole, it is possible to achieve following function:Pass through the emergent ray of fiber optic conduction to the camber reflection with reference to the optical signal of light collector 1
The concave surface of mirror 6, the end position of the signal acquisition slit 7 of the spectrum light splitter 4 is focused on after the curved reflector 6 reflection
Put.Moreover, the curved reflector 6 that the present embodiment uses has full spectrum segment achromatism and focusing function.
The detection method of the push-broom type UAV system high spectrum image survey meter for the synchrotron radiation correction that the present embodiment provides,
Step is as follows:
S1, the phtographic lens 3 of target optical spectrum image detector 2 gather target image optical signal, and target image light are believed
Number it is sent at signal acquisition slit 7.
Meanwhile reference optical signal is gathered with reference to light collector 1, and the reference optical signal is sent to the spectrum
At the signal acquisition slit 7 of device 4.Above two optical signal is arranged side by side but does not mix, while projects at collection slit, two kinds of light letters
Number projection schematic diagram is as shown in Fig. 2 correspondence position on x hand designations slits, spectral band corresponding to y hand designations, can be with
See that reference optical signal occupies the V sections in slit x directions, target image optical signal occupies the W sections in slit x directions.
S2, target image optical signal and reference optical signal are sent to spectrum light splitter 4 by signal acquisition slit 7 simultaneously,
Signal is blended into same picture frame after image detector 5 into incoming image processor just to be stored.
In picture frame, target image optical signal and reference optical signal respectively occupy fixed region.
S3, when carrying out data processing, open picture frame, while it is direct with reference optical signal to extract target image optical signal
Handled, it is possible to for carrying out the computing of the projects such as reflectivity to full figure, without making reference the time of light file again
The computings such as matching, relative detector calibration.
Such as:When extraction target image optical signal is directly handled with reference optical signal, to target sample reflectivity
Calculation is:
K=Io-D/aIc-D,
Wherein, Io is target image light signal strength, and Ic is reference optical signal intensity, and a is that light source imports coefficient, and D is
Detector dark current noise figure.
S4, in reference light take area to set up region of interest ROI, the reference optical signal of region of interest ROI is carried out real
When monitor, according to the change of the region light intensity, feedback data, data processor adjust automatically target light are provided for data processor
Compose image detector(2)Parameter, the collection to target image optical signal realize Dynamic radiation correct.
The system of light exposure is automatically controlled some, can pass through the phtographic lens 3 in target optical spectrum image detector 2
Gatherer process in, by taking area to set up area-of-interest in reference light(ROI), according to the change of the region light intensity, by electricity
The exposure parameter of brain system or microprocessor adjust automatically detector, it is obtained consistent exposure effect, reach spectrum picture
Detect the purpose of Dynamic radiation correction.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, but it must not be explained
For to the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims define are not departed from
Various changes can be made in the form and details for it.
Claims (4)
1. a kind of push-broom type UAV system high spectrum image survey meter with synchrotron radiation correction, including target optical spectrum image detection
Device(2)With with the target optical spectrum image detector(2)Enter the image processor of row data communication, the target optical spectrum image is visited
Survey device(2)Including phtographic lens(3), spectrum light splitter(4)And image detector(5), the spectrum light splitter(4)Taken the photograph with described
Shadow camera lens(3)Relative one end setting signal collection slit(7), it is characterised in that also include referring to light collector(1)And curved surface
Speculum(6), it is described to refer to light collector(1)It is arranged at the unobstructed place in top of the unmanned plane, the curved reflector(6)
It is arranged at the spectrum light splitter(4)Signal acquisition slit(7)One end, it is described to refer to light collector(1)Optical signal lead to
Fiber optic conduction is crossed to the curved reflector(6)Concave surface, through the curved reflector(6)Reflect and focus on the spectrum point
Light device(4)Signal acquisition slit(7)End.
2. a kind of push-broom type UAV system high spectrum image survey meter with synchrotron radiation correction according to claim 1,
Characterized in that, described refer to light collector(1)For with cosine correction and the collector insensitive to light source direction.
3. the push-broom type UAV system high spectrum image survey meter according to claim 1 or 2 with synchrotron radiation correction
Detection method, it is characterised in that step is as follows:
S1, target optical spectrum image detector(2)Phtographic lens(3)Target image optical signal is gathered, and target image light is believed
Number it is sent to signal acquisition slit(7)Place;
Meanwhile with reference to light collector(1)Reference optical signal is gathered, and the reference optical signal is sent to the spectrum light splitter
(4)Signal acquisition slit(7)Place;
Above two optical signal is arranged side by side but does not mix, while projects at collection slit;
S2, target image optical signal and reference optical signal pass through signal acquisition slit simultaneously(7)It is sent to spectrum light splitter(4),
Signal is blended into same picture frame and passes through image detector(5)Image processor is passed to afterwards just to be stored;
In picture frame, target image optical signal and reference optical signal respectively occupy fixed region;
S3, when carrying out data processing, open picture frame, extract destination image data and reference light number from corresponding position respectively
According to directly being handled.
4. the detection of the push-broom type UAV system high spectrum image survey meter according to claim 3 with synchrotron radiation correction
Method, it is characterised in that also comprise the following steps:Area is taken to set up region of interest ROI in reference light, to area-of-interest
ROI reference optical signal is monitored in real time, and according to the change of the region light intensity, feedback data is provided for data processor, number
According to processor adjust automatically target optical spectrum image detector(2)Parameter, the collection to target image optical signal realizes dynamic spoke
Penetrate correction.
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CN109300091B (en) * | 2018-09-12 | 2020-10-30 | 首都师范大学 | Radiance correction method and device |
CN109521415A (en) * | 2018-12-19 | 2019-03-26 | 上海同繁勘测工程科技有限公司 | Radiant correction apparatus and system |
CN110850436B (en) * | 2019-11-28 | 2023-03-31 | 中国科学院合肥物质科学研究院 | Device and method for measuring spectrum of airborne hyperspectral imaging laser radar in real time |
CN112357107A (en) * | 2020-10-28 | 2021-02-12 | 中国科学院上海技术物理研究所杭州大江东空间信息技术研究院 | Hyperspectral push-broom imaging system carried on six-rotor unmanned aerial vehicle |
EP4325185A1 (en) * | 2021-04-14 | 2024-02-21 | Yusense Information Technology and Equipment (Qingdao) Inc. | Correction method for spectral imaging device, and spectral imaging device |
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CN1286898A (en) * | 1999-06-17 | 2001-03-14 | 株式会社佐竹制作所 | Diagnostic method for nutrition condition of crops in plantation |
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