CN102175320A - Laser and infrared composite stealth resisting spectroscopic device - Google Patents
Laser and infrared composite stealth resisting spectroscopic device Download PDFInfo
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Abstract
The invention discloses a laser and infrared composite stealth resisting spectroscopic device, which comprises a pulse generator, a narrowband scanning controller, a logic processing component, a spectrum narrowband scanning filter, a high-sensitivity mercury-cadmium-tellurium APD (Amplitude Probability Distribution) detector, a framing single-photon image receiver, a target extracting component, an image fusion component and a monitor, wherein the pulse generator is connected with a narrowband scanning stepped controller and the logic processing component respectively; the narrowband scanning controller is connected with the spectrum narrowband scanning filter and the high-sensitivity mercury-cadmium-tellurium APD detector respectively; the spectrum narrowband scanning filter is arranged at the front end of the high-sensitivity mercury-cadmium-tellurium APD detector; the high-sensitivity mercury-cadmium-tellurium APD detector, the framing single-photon image receiver, the target extracting component, the image fusion component and the monitor are connected with one another in sequence; and the logic processing component is connected with the target extracting component and the image fusion component respectively. By adopting the device, a laser and infrared composite stealth hidden target resisting effect is achieved.
Description
Technical field
The invention belongs to anti-stealthy infrared detection technique, particularly a kind of laser and stealthy spectroscopy device of infrared compatibility of resisting.
Background technology
General, Detection Techniques and stealth technology are the contradiction of a pair of mutual restriction.In recent years, along with littler lighter, structure is simpler, the development of the non-refrigeration type infrared device that cost is more cheap, infrared detection technique is widely used in numerous areas such as target detection, identification and guidance, and its can all weather operations, good concealment, antijamming capability be strong etc., and advantage is given full play of.Simultaneously, make personnel in the battlefield, weapon equipment, military target be subjected to increasing threat at infrared detection technique, measures such as infrared stealth technology utilization shielding, low-launch-rate coating, heat inhibition, reduce or change the target infrared radiation feature, promptly reduce target infrared radiation intensity and characteristic, thereby realize the low detectivity of target, with the scouting of antagonism infrared detection system.What is more, and the proposition of some compatible invisible methods and realization often can make target can hide the tracking of conventional single spectral coverage detector, have proposed a bigger difficult problem to Detection Techniques.
In order to address this problem, the notion of multiband complex probe has been carried.In principle, when irradiate light is to object, all can absorb, reflection, three processes of transmission.According to Kirchhoff's law, object emissivity when thermal equilibrium state equals absorptivity.So for nontransparent object (being that transmissivity is zero), in arbitrary fixed band, its emissivity and reflectivity must be inversely proportional to.These characteristics of the multiband complex probe having utilized just realize the detection to stealthy target, thereby have been subjected to showing great attention to of various countries military services.US military and Ministry of National Defence have just started " Joint Multi-Spectral Program (JMSP) " from the nineties in last century, carry out the on-the-spot test of a series of infrared excess spectrum.France's " Si Pilaer " warship has also all adopted two waveband (3～5 μ m, 8～12 μ m) complex probe mode to improve the detectivity of target with the IRSCAN of infrared warning system and Holland.Domestic aspect, number of research projects has also been done to multispectral, ultraphotic spectrum infrared acquisition by each colleges and universities and research institute in recent years.Sun Qiang, Yu Bin etc. that 2002 older spring scenery are learned precision optical machinery and physics Institute and contemporary optics research institute of Nankai University have reported the applied research achievement of binary optical in the infrared excess spectrographic detection, and the new infrared ultraphotic spectrum of having illustrated the big dispersion characteristics of binary optical elements is theoretically surveyed the principle of imaging.The military spring breeze of space optics ERC of Harbin Institute of Technology in 2003, Zhang Wei etc. have reported the achievement in research (" infrared and millimeter wave journal " 2003 the 22nd volume 4 phases " based on the automatic target recognizer of infrared multispectral image correlation ") based on the automatic target recognizer of infrared multispectral image correlation, have proposed a kind of automatic target identification new algorithm based on the infrared multispectral image correlation.The Yang Xin army of Nankai University in 2005 and University Of Tianjin, home country's light etc. has been reported folding/spread out and has been mixed multispectral Infrared Imaging Spectrometer from axle system design studies achievement (" infrared with laser engineering " the 34th 4 phases of volume in 2005 " roll over/spread out mix multispectral Infrared Imaging Spectrometer design from axle system "), set forth the new infrared two band ultra-optical spectrum that utilizes the diffraction optical element dispersion characteristics and surveyed the ultimate principle of imaging, and provided concrete system design example.But for laser and the stealthy target of infrared compatibility, stealth technology realizes hiding the purpose of stealthy detection by changing target emission and reflected waveband frequency spectrum.In the military affairs, when can making target reflection, laser stealth technology avoids 10.6 μ m sensitizing ranges, and infrared stealth technology can make target at 3～5 μ m, these two atmospheric windows of 8～12 μ m have lower emissivity, laser and infrared compatible stealth technology then can make target narrower antiradar reflectivity band occur near 10.6 μ m, and its all band is low radiation, reach stealthy to laser with this, simultaneously little to the influence of infrared stealth again, and the concrete spectrum position of reformed emission or reflected waveband is unknowable, yet because traditional double wave band, the detection spectral regions immobilization that multiband is surveyed, so for the detection of laser and the stealthy target of infrared compatibility, be difficult to guarantee the stability surveyed, practicality is also relatively poor.
Summary of the invention
The object of the present invention is to provide a kind of anti-stealthy infrared detection device based on narrow-band spectrum scanning, the unfixing frequency spectrum of surveying when scanning probe, but cut apart bandwidth and spectral scan step distance according to the adaptive adjusting spectrum of environmental baseline, scene is carried out spectral scan and spacescan.When laser and the stealthy target of infrared compatibility are carried out the infrared band imaging detection, it can effectively detect echo signal, improves detection accuracy and image quality.
The technical solution that realizes the object of the invention is: a kind of laser and stealthy spectroscopy device of infrared compatibility of resisting, comprise pulse producer, arrowband scanning monitor, logical process parts, spectrum narrowband scanning filter, highly sensitive mercury cadmium telluride APD detector, divide the frame single photon to extract parts, image co-registration parts and monitor as receiver, target, wherein pulse producer is connected respectively with the logical process parts with arrowband scanning step-by-step controller; The arrowband scanning monitor is connected respectively with highly sensitive mercury cadmium telluride APD detector with the spectrum narrowband scanning filter; The spectrum narrowband scanning filter places the front end of highly sensitive mercury cadmium telluride APD detector, this highly sensitive mercury cadmium telluride APD detector, branch frame single photon link to each other with monitor successively as receiver, target extraction parts, image co-registration parts, and logical process parts linking objective respectively extract parts and image co-registration parts;
The reference clock that the work of pulse producer generation device is required, control arrowband scanning monitor, the operation of processing logic parts, the arrowband scanning monitor is under the effect of reference clock, produce required driving power and the control signal of spectrum narrowband scanning filter work, simultaneously, the arrowband scanning monitor can be cut apart bandwidth to spectrum and carry out the self-adaptation adjusting according to the database of optimum bandwidth under the typical context, coupling arrowband scanning filter is selected suitable filter coating for use, reaches the arrowband and cuts apart purpose; The scene information that comprises background and target is divided into the single spectrum information in arrowband after the effect of spectrum narrowband scanning filter, under the effect of highly sensitive mercury cadmium telluride APD detector, form and divide frame single photon image information afterwards; The spectrum narrowband scanning filter is in the mode of stepping bandwidth scanning, and scanning imagery is surveyed interested spectral band, finally forms several minutes frame single photon picture signal; The branch frame single photon image blend signal that contains echo signal, background signal and noise signal, transfer to branch frame single photon as receiver, receive and store, reduce noise, extract a series of signal Processing such as target, fused images by extraction parts of the target under the processing logic unit control and image co-registration parts; Target is extracted parts and at first minute frame single photon is carried out the noise reduction pre-service as the branch frame single photon image blend signal that the receiver reception comes, and the neighbourhood noise that system noise that the work of reduction detector brings and environmental change bring is to the influence of back signal Processing work; Whether next whether target is extracted the parts contrast and is divided the frame single photon to receive each width of cloth that comes as receiver to divide frame single photon image to exist emissivity unusual, be key frame to judge this minute frame single photon image; Then, in key frame single photon image, passing threshold is chosen, and distinguishes target and background information; Target information frame single photon image of tangible several minutes carried out data fusion after the image co-registration parts were screened and chosen the processing of target extraction parts, reduced ground unrest, the enhancing target information, and the formation fused images is finally sent to picture monitor and is supplied observer's observation.
The present invention compared with prior art, its remarkable advantage: adopt the stealthy spectroscopy device of antagonism laser and infrared compatibility that laser and the stealthy target of infrared compatibility are detected as picture, stealthy principle and characteristic at laser and the stealthy target of infrared compatibility, adopted the mode of narrow-band spectrum scanning, promptly when scanning probe, as traditional anti-stealthy detection imaging system, do not fix the detection frequency spectrum, but cut apart bandwidth and spectral scan step distance according to the adaptive adjusting spectrum of environmental baseline, utilize spectrum narrowband filter coating realization spectrum to cut apart, scene is carried out spectral scan and spacescan.Contrasting traditional detection system surveys in fixed frequency spectrum, this device is with the spectrum segmentation and the realization spectrum segment scanning of echo signal, on the one hand, do not have a priori unusual certain certain fixing detection frequency spectrum that appears at of emissivity of hypothetical target spectrum, improved the reliability and stability of surveying.Be an integral process owing to being operated in its response frequency scope of photodetector on the other hand, and the spectrum segmentation can be improved detector operation efficient, thereby guarantee to improve detection accuracy and image quality.This device also utilizes the highly sensitive detection feature of mercury cadmium telluride APD detector, the narrow band signal of assurance after spectrum is cut apart measured reliably, then lock emissivity and unusual frequency spectrum and position occur, detect target, reach the effect of antagonism laser and the stealthy target of infrared compatibility.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
The anti-stealthy infrared detection device that Fig. 1 is based on narrow-band spectrum scanning constitutes.
The workflow block diagram of arrowband scanning monitor in the anti-stealthy infrared detection device that the narrow-band spectrum that is based on Fig. 2 scans.
The workflow block diagram of logical process parts in the anti-stealthy infrared detection device that the narrow-band spectrum that is based on Fig. 3 scans.
Fig. 4 is the curve of common non-refrigeration type cadmium-telluride-mercury infrared detector responsiveness with wavelength variations.
Embodiment
In conjunction with Fig. 1, the present invention resists laser and the stealthy spectroscopy device of infrared compatibility, successively by pulse producer 1, arrowband scanning monitor 2, logical process parts 3, spectrum narrowband scanning filter 4, highly sensitive mercury cadmium telluride APD detector 5, divide the frame single photon as receiver 6, target is extracted parts 7, and image co-registration parts 8 and monitor etc. are partly formed.
Wherein pulse producer 1 is connected respectively with logical process parts 3 with arrowband scanning step-by-step controller 2; Arrowband scanning monitor 2 and spectrum narrowband scanning filter 4, highly sensitive mercury cadmium telluride APD detector 5 connects; Spectrum narrowband scanning filter 4 places the front end of highly sensitive mercury cadmium telluride APD detector 5; Highly sensitive mercury cadmium telluride APD detector 5 divides the frame single photon as receiver 6, and target is extracted parts 7, and image co-registration parts 8 link to each other successively.Logical process parts 3 linking objective respectively extract parts 7 and image co-registration parts 8.Arrowband scanning monitor 2 is by the wave filter driving circuit, and the optimum bandwidth database is formed under feedback control module and the typical context.The wave filter driving circuit produces the required driving power of spectrum narrowband scanning filter 4 work under the effect of reference clock, 4 work of control spectrum narrowband scanning filter.The signal characteristic that feedback control module can record according to highly sensitive mercury cadmium telluride APD detector 5, the database of optimum bandwidth under the comparison typical context, coupling arrowband scanning filter is selected suitable filter coating for use and is chosen suitable arrowband sweep frequency stepping amplitude, realizes spectrum is cut apart the self-adaptation adjusting of bandwidth.Spectrum narrowband scanning filter 4 places highly sensitive mercury cadmium telluride APD detector 5 front ends, is made up of the physical construction that the spectrum narrowband optical filter and the drive optical filter of 3 groups of different half widths are changed before highly sensitive mercury cadmium telluride APD detector 5.The spectrum narrowband optical filter of 3 groups of different half widths is respectively: totally 40 of first group of optical filters, and half width is 20～25nm, centre wavelength is respectively 3.00 μ m, 3.05 μ m, 3.10 μ m......4.95 μ m.So this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 40～50nm, and the spectrum step distance is 0.05 μ m during scanning.Totally 20 of second group of optical filters, half width is 30～35nm, centre wavelength is respectively 3.0 μ m, 3.1 μ m, 3.2 μ m......4.9 μ m.So this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 60～70nm, and the spectrum step distance is 0.1 μ m during scanning.Totally 10 of the 3rd group of optical filters, half width is 50～55nm, centre wavelength is respectively 3.0 μ m, 3.2 μ m, 3.4 μ m......4.8 μ m.So this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 100～110nm, and the spectrum step distance is 0.2 μ m during scanning.Highly sensitive mercury cadmium telluride APD detector 5 is selected the cadmium-telluride-mercury infrared detector of common non-refrigeration type for use, and its responsiveness with the curve of wavelength variations as shown in Figure 4.It is the influence that target is extracted the time delay of parts 7,8 work of image co-registration parts that sequential control circuit in the processing logic parts 3 is subjected to the unlike signal processing element, according to reference clock, controlled pulse drives target and extracts parts 7 and 8 work of image co-registration parts.Target is extracted parts 7 and is comprised reduction noise module and extract object module, realizes by algorithm.Reduce the noise module and at first minute frame single photon is carried out the noise reduction pre-service as the branch frame single photon image blend signal that receiver 6 receptions come, the neighbourhood noise that system noise that the work of reduction detector brings and environmental change bring is to the influence of back signal Processing work.Next extracting object module divides frame single photon image to compare between the frame up and down minute frame single photon as each width of cloth that receiver 6 receptions come, finding out " key frame " that whether there be reflection emissivity unusual (high or low) divides frame single photon image (general, we claim, there is regionally detecting to arrive or high or low jump signal if divide between the frame single photon image at adjacent two frames, explanation has " emissivity is unusual " near this frequency, and " key frame " divides frame single photon image to be distributed near the wave band of stealthy target stealth technology work more); Then, determine the optimal threshold size, in " key frame " single photon image, tell target and background information according to threshold zone by the target and the signal characteristic of background under different spectrum conditions thereof that apply different stealth materials in the comparison database.Image co-registration parts 8 comprise image and select module, and image co-registration module and Image Enhancement Based piece are realized by algorithm.At first image selects the single photon image that contains " key frame " after module is handled target extraction parts 7 to carry out image quality evaluation, and screen and to select target information and obviously (promptly calculate the information entropy of each width of cloth image and do descending sort, it is big to choose entropy) several minutes frame single photon image, be transferred to the image co-registration module as the image co-registration source images and carry out data fusion.The image co-registration module is not that very big multi-band image merges for the spectral image difference, by wavelet transformation, selects for use based on the pyramidal blending algorithm of contrast and carries out image co-registration, and its algorithm and realization are all comparatively simple.The Image Enhancement Based piece adopts the processing mode of segmentation histogram equalization to carry out the figure image intensifying.At first use a global threshold the image histogram separated into two parts, high gray area contains the target information of the overwhelming majority, and low gray area contains the background information of the overwhelming majority, again two parts is carried out equalization respectively, carries out in various degree compression at last to be combined into a complete image.Processed images through the segmentation histogram equalization has improved picture contrast, the details sharp outline.Through data fusion, reduce ground unrest, strengthen the fused images that forms after the target information, finally send to picture monitor and observe for the observer.Included the best arrowband that satisfies different background condition correspondence that under typical context, (is that scenery is simple in the visual field, has multiple light signal to disturb) in the optimum bandwidth database under the typical context and cut apart bandwidth and spectrum stepping length with respect to complex background.Also include the target and the signal characteristic of background under different spectrum conditions thereof that apply different stealth materials in addition in the database.
When the present invention resists the stealthy spectroscopy device busy of laser and infrared compatibility:
1, pulse producer 1 produces the required reference clock of system works, control arrowband scanning monitor 2,3 operations of processing logic parts.
2, arrowband scanning monitor 2 is under the effect of reference clock, produce required driving power and the control signal of spectrum narrowband scanning filter 4 work, simultaneously, arrowband scanning monitor 2 can be according to the database of optimum bandwidth under the typical context, spectrum is cut apart bandwidth carry out the self-adaptation adjusting, coupling arrowband scanning filter is selected suitable filter coating for use, reaches the arrowband and cuts apart purpose.
3, the scene information that comprises background and target is divided into the single spectrum information in arrowband after 4 effects of spectrum narrowband scanning filter, under the effect of highly sensitive mercury cadmium telluride APD detector 5, forms and divides frame single photon image information afterwards.Spectrum narrowband scanning filter 4 is in the mode of stepping bandwidth scanning, and scanning imagery is surveyed interested spectral band (need satisfy highly sensitive mercury cadmium telluride APD detector 5 work spectral band requirements), finally forms several minutes frame single photon picture signal.
4, the branch frame single photon image blend signal that contains echo signal, background signal and noise signal, transfer to branch frame single photon as receiver 6, receive and store, reduce noise, extract a series of signal Processing such as target, fused images by target extraction parts 7 under 3 controls of processing logic parts and image co-registration parts 8.
5, target extraction parts 7 at first carry out the noise reduction pre-service to minute frame single photon as the branch frame single photon image blend signal that receiver 6 receptions come, and the neighbourhood noise that system noise that the work of reduction detector brings and environmental change bring is to the influence of back signal Processing work.Whether next target is extracted 7 pairs of score frames of parts single photon and is received each width of cloth point frame single photon image that comes as receiver 6 and whether have emissivity unusual (high and low), be " key frame " to judge this minute frame single photon image; Then, in " key frame " single photon image, passing threshold is chosen, and distinguishes target and background information.
6, target informations frame single photon images of tangible several minutes carried out data fusion after image co-registration parts 8 were screened and chosen 7 processing of target extraction parts, reduced ground unrest, the enhancing target information, and the formation fused images is finally sent to picture monitor and is supplied observer's observation.
According to some needs picture signal is done the special occasions of digitized processing, the grey scale pixel value that narrow-band spectrum scans anti-stealthy infrared acquisition also can be made following binary conversion treatment: background radiation signal---non-object pixel gray-scale value is 0 (or 1); The gray-scale value of stealthy target emanation signal---object pixel is 1 (or 0).Promptly the anti-stealthy infrared acquisition based on narrow-band spectrum scanning can obtain binary image.
The workflow block diagram that the present invention is based on arrowband scanning monitor in the anti-stealthy infrared detection device of narrow-band spectrum scanning as shown in Figure 2.Highly sensitive mercury cadmium telluride APD detector 5 at first receives the spectral information of scene under first coordinate, after making contrast with typical context spectrum condition, select then best arrowband to cut apart the length of bandwidth and spectrum stepping, the physical construction of spectrum narrowband scanning filter 4 can drive the filter coating group that is complementary and turn to highly sensitive mercury cadmium telluride APD detector 5 front ends, and the stepping length control replacing filter coating group to be complementary, realize spectrum narrowband scanning to scene.In the replacing of finishing all filter coating groups that are complementary, finish after the spectrum narrowband scanning, highly sensitive mercury cadmium telluride APD detector 5 can receive the spectral information of scene under next volume coordinate, and continues said process, know that all scanning processes are finished till.
The workflow block diagram that the present invention is based on logical process parts in the anti-stealthy infrared detection device of narrow-band spectrum scanning as shown in Figure 3.Divide the frame single photon to receive the branch frame single photon image blend signal that comes and to carry out the noise reduction pre-service through reducing the noise module as receiver 6, next in extracting object module, at first first frame signal can be put into register 1, second frame signal is put into register 2, comparer can in the register 1 and register 2 in signal compare, if the unusual phenomenon of emissivity, judge that so this frame signal is " key frame " signal, compares if not then the next frame signal being continued to put into register.When judging current frame signal for " key frame " signal, transfer the target and the signal characteristic of background under different spectrum conditions thereof that apply different stealth materials in the database earlier and determine the optimal threshold size, tell target and background information according to threshold zone afterwards.Next, " key frame " image can be admitted to image and select in the module, calculates the information entropy of all " key frame " images earlier, therefrom choose entropy big put into the medium pending image co-registration of image co-registration storer.Image in the image co-registration storer can be selected for use based on the pyramidal blending algorithm of contrast and be carried out image co-registration, and be stored in the fusion results earlier by wavelet decomposition then in the image co-registration module.The Image Enhancement Based piece can reach the raising picture contrast to fused images segmentation histogram equalization, strengthens the effect of sharpness, sends to picture monitor at last and observes for the observer.
Claims (7)
1. one kind is resisted laser and the stealthy spectroscopy device of infrared compatibility, it is characterized in that comprising pulse producer (1), arrowband scanning monitor (2), logical process parts (3), spectrum narrowband scanning filter (4), highly sensitive mercury cadmium telluride APD detector (5), divide the frame single photon to extract parts (7), image co-registration parts (8) and monitor as receiver (6), target, wherein pulse producer (1) is connected respectively with logical process parts (3) with arrowband scanning step-by-step controller (2); Arrowband scanning monitor (2) is connected respectively with highly sensitive mercury cadmium telluride APD detector (5) with spectrum narrowband scanning filter (4); Spectrum narrowband scanning filter (4) places the front end of highly sensitive mercury cadmium telluride APD detector (5), this highly sensitive mercury cadmium telluride APD detector (5), branch frame single photon link to each other with monitor successively as receiver (6), target extraction parts (7), image co-registration parts (8), and logical process parts (3) linking objective respectively extract parts (7) and image co-registration parts (8);
The required reference clock of pulse producer (1) generation device work, control arrowband scanning monitor (2), processing logic parts (3) operation, arrowband scanning monitor (2) is under the effect of reference clock, produce required driving power and the control signal of spectrum narrowband scanning filter (4) work, simultaneously, arrowband scanning monitor (2) can be according to the database of optimum bandwidth under the typical context, spectrum is cut apart bandwidth carry out the self-adaptation adjusting, coupling arrowband scanning filter is selected suitable filter coating for use, reaches the arrowband and cuts apart purpose; The scene information that comprises background and target is divided into the single spectrum information in arrowband after spectrum narrowband scanning filter (4) effect, under the effect of highly sensitive mercury cadmium telluride APD detector (5), form and divide frame single photon image information afterwards; Spectrum narrowband scanning filter (4) is in the mode of stepping bandwidth scanning, and scanning imagery is surveyed interested spectral band, finally forms several minutes frame single photon picture signal; The branch frame single photon image blend signal that contains echo signal, background signal and noise signal, transfer to branch frame single photon as receiver (6), receive and store, reduce noise, extract a series of signal Processing such as target, fused images by target extraction parts (7) under processing logic parts (3) control and image co-registration parts (8); Target is extracted parts (7) and at first minute frame single photon is carried out the noise reduction pre-service as the branch frame single photon image blend signal that receiver (6) reception comes, and the neighbourhood noise that system noise that the work of reduction detector brings and environmental change bring is to the influence of back signal Processing work; Whether next whether target is extracted parts (7) and score frame single photon is received each width of cloth point frame single photon image that comes as receiver (6) is existed emissivity unusual, be key frame to judge this minute frame single photon image; Then, in key frame single photon image, passing threshold is chosen, and distinguishes target and background information; Target information frame single photon image of tangible several minutes carried out data fusion after image co-registration parts (8) were screened and chosen target extraction parts (7) processing, reduce ground unrest, strengthen target information, form fused images, finally send to picture monitor and observe for the observer.
2. the spectroscopy device that antagonism laser according to claim 1 and infrared compatibility are stealthy, it is characterized in that arrowband scanning monitor (2) is made up of optimum bandwidth database under wave filter driving circuit, feedback control module and the typical context, the wave filter driving circuit is under the effect of reference clock, produce the required driving power of spectrum narrowband scanning filter (4) work, control spectrum narrowband scanning filter (4) work; The signal characteristic that feedback control module can record according to highly sensitive mercury cadmium telluride APD detector (5), the database of optimum bandwidth under the comparison typical context, coupling arrowband scanning filter is selected suitable filter coating for use and is chosen suitable arrowband sweep frequency stepping amplitude, realizes spectrum is cut apart the self-adaptation adjusting of bandwidth.
3. the spectroscopy device that antagonism laser according to claim 2 and infrared compatibility are stealthy, it is characterized in that under the effect of arrowband scanning monitor (2), highly sensitive mercury cadmium telluride APD detector (5) at first receives the spectral information of scene under first coordinate, after making contrast with typical context spectrum condition, select then best arrowband to cut apart the length of bandwidth and spectrum stepping, the physical construction of spectrum narrowband scanning filter (4) can drive the filter coating group that is complementary and turn to highly sensitive mercury cadmium telluride APD detector (5) front end, and the stepping length control replacing filter coating group to be complementary, realize spectrum narrowband scanning to scene; In the replacing of finishing all filter coating groups that are complementary, finish after the spectrum narrowband scanning, highly sensitive mercury cadmium telluride APD detector (5) can receive the spectral information of scene under next volume coordinate, and continues said process, know that all scanning processes are finished till.
4. the spectroscopy device that antagonism laser according to claim 1 and infrared compatibility are stealthy, it is characterized in that spectrum narrowband scanning filter (4) is by the spectrum narrowband optical filter of 3 groups of different half widths and drive optical filter and form in the physical construction of the preceding replacing of highly sensitive mercury cadmium telluride APD detector (5), the spectrum narrowband optical filter of 3 groups of different half widths is respectively: totally 40 of first group of optical filters, half width is 20～25nm, centre wavelength is respectively 3.00 μ m, 3.05 μ m, 3.10 μ m......4.95 μ m, so this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 40～50nm, and the spectrum step distance is 0.05 μ m during scanning; Totally 20 of second group of optical filters, half width is 30～35nm, and centre wavelength is respectively 3.0 μ m, 3.1 μ m, 3.2 μ m......4.9 μ m, so this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 60～70nm, and the spectrum step distance is 0.1 μ m during scanning; Totally 10 of the 3rd group of optical filters, half width is 50～55nm, and centre wavelength is respectively 3.0 μ m, 3.2 μ m, 3.4 μ m......4.8 μ m, so this group optical filter is cut apart spectrum 3～5 mu m wavebands, cutting apart bandwidth is 100～110nm, and the spectrum step distance is 0.2 μ m during scanning.
5. the spectroscopy device that antagonism laser according to claim 1 and infrared compatibility are stealthy, it is characterized in that target extraction parts (7) comprise reduction noise module and extract object module, reduce the noise module and at first minute frame single photon is carried out the noise reduction pre-service as the branch frame single photon image blend signal that receiver (6) reception comes, the neighbourhood noise that system noise that the work of reduction detector brings and environmental change bring is to the influence of back signal Processing work; Next extract object module and divide frame single photon image to compare between the frame up and down as each next width of cloth of receiver (6) reception, find out whether to exist and reflect that the unusual key frame of emissivity divides frame single photon image minute frame single photon; Then, determine the optimal threshold size, in key frame single photon image, tell target and background information according to threshold zone by the target and the signal characteristic of background under different spectrum conditions thereof that apply different stealth materials in the comparison database.
6. the spectroscopy device that antagonism laser according to claim 1 and infrared compatibility are stealthy, it is characterized in that image co-registration parts (8) comprise image and select module, image co-registration module and Image Enhancement Based piece, at first the image single photon image that contains key frame of selecting module that target is extracted after parts (7) are handled carries out image quality evaluation, and screen select target information significantly several minutes frame single photon image, be transferred to the image co-registration module as the image co-registration source images and carry out data fusion; The image co-registration module is not that very big multi-band image merges for the spectral image difference, by wavelet transformation, selects for use based on the pyramidal blending algorithm of contrast and carries out image co-registration; The Image Enhancement Based piece adopts the processing mode of segmentation histogram equalization to carry out the figure image intensifying.
7. the spectroscopy device that antagonism laser according to claim 1 and infrared compatibility are stealthy, the workflow that it is characterized in that processing logic parts (3) is: dividing the frame single photon to receive the branch frame single photon image blend signal that comes as receiver (6) can carry out the noise reduction pre-service through reducing the noise module, next in extracting object module, at first first frame signal can be put into register 1, second frame signal is put into register 2, comparer can in the register 1 and register 2 in signal compare, if the unusual phenomenon of emissivity, judge that so this frame signal is the key frame signal, compare if not then the next frame signal being continued to put into register; When judging current frame signal and be the key frame signal, transfer the target and the signal characteristic of background under different spectrum conditions thereof that apply different stealth materials in the database earlier and determine the optimal threshold size, tell target and background information according to threshold zone afterwards; Next, key frame images can be admitted to image and select in the module, calculate the information entropy of all key frame images earlier, therefrom choose entropy big put into the medium pending image co-registration of image co-registration storer, image in the image co-registration storer can be earlier by wavelet decomposition in the image co-registration module, select for use then based on the pyramidal blending algorithm of contrast and carry out image co-registration, and be stored in the fusion results; The Image Enhancement Based piece can reach the raising picture contrast to fused images segmentation histogram equalization, strengthens the effect of sharpness, sends to picture monitor at last and observes for the observer.
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| CN103065310A (en) * | 2012-12-25 | 2013-04-24 | 南京理工大学 | Hyperspectral image marginal information extraction method based on three-dimensional light spectrum angle statistic |
| WO2016106955A1 (en) * | 2014-12-30 | 2016-07-07 | 华中科技大学 | Laser infrared composite ground building recognition and navigation method |
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| CN101329401A (en) * | 2007-06-19 | 2008-12-24 | 孟英志 | Method and apparatus for discovering invisible aircraft |
| CN101930073A (en) * | 2010-03-30 | 2010-12-29 | 成都市猎户座科技有限责任公司 | System for recognizing anti-aircraft weapon anti-stealth spatially modulated interference imaging spectrometer target |
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| CN101329401A (en) * | 2007-06-19 | 2008-12-24 | 孟英志 | Method and apparatus for discovering invisible aircraft |
| CN101930073A (en) * | 2010-03-30 | 2010-12-29 | 成都市猎户座科技有限责任公司 | System for recognizing anti-aircraft weapon anti-stealth spatially modulated interference imaging spectrometer target |
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| CN103065310B (en) * | 2012-12-25 | 2015-09-30 | 南京理工大学 | Based on the high spectrum image edge information extracting method of three-dimensional light spectral corner statistics |
| WO2016106955A1 (en) * | 2014-12-30 | 2016-07-07 | 华中科技大学 | Laser infrared composite ground building recognition and navigation method |
| US9817107B2 (en) | 2014-12-30 | 2017-11-14 | Huazhong University Of Science And Technology | Above-ground building recognition method and navigation method combining laser and infrared |
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