Journals >Journal of Infrared and Millimeter Waves
Contents
2003
Volume: 22 Issue 2
18 Article(s)
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Research Article
A NOVEL APPROACH OFFUSING TEMPORAL AND SPATIAL INFORMATION FOR SEGMENTING MOVING OBJECTS
[in Chinese], [in Chinese], and [in Chinese]
A novel approach basedon spatial-temporal information fusion is proposed to segment moving objects in videosequences. In the proposed approach, temporal and spatial information are integratedgradually by a region binding process during the segmentation, which is different to theprocess of combining temporal and spatialA novel approach basedon spatial-temporal information fusion is proposed to segment moving objects in videosequences. In the proposed approach, temporal and spatial information are integratedgradually by a region binding process during the segmentation, which is different to theprocess of combining temporal and spatial segmentation results. The significance of theproposed region binding algorithm is that regions are represented and characterizeddistributively. In the first stage of the proposed approach, current frame is segmentedinto many small regions primitively. Then, these small regions are bound to form theBinding-CCores (BC). Finally, the rest regions are bound to their neighboring BCs understrong or weak rules to get the final object regions. Experimental result demonstrated theperformance of the approach..
Journal of Infrared and Millimeter Waves
- Publication Date: Jan. 01, 1900
- Vol. 22, Issue 2, 81 (2003)
PREDICTION AND COMPENSATION OF 1/F NOISE IN INFRARED IMAGING SENSORS
[in Chinese], [in Chinese], and [in Chinese]
The generating mechanism of 1/f noise in infrared imaging sensors is analyzed. A new method predicting and compensating the 1/f noise in infrared imaging sensor is presented. The experimental results on the data sampled in practical situation shown the effect of the method .The generating mechanism of 1/f noise in infrared imaging sensors is analyzed. A new method predicting and compensating the 1/f noise in infrared imaging sensor is presented. The experimental results on the data sampled in practical situation shown the effect of the method ..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 86 (2003)
THE SIMULATION OF INFRARED IMAGING OF THE SEA TARGET WITH THICK HULL
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Based on the existing geometric model of infrared images of ships to realize the geometric model of ships characterized as parts of thick hull by means of facet expanding, the physical model for the unstable state heat transfer of the ship with bulk structure has been obtained. The theoretically simulated infrared imagBased on the existing geometric model of infrared images of ships to realize the geometric model of ships characterized as parts of thick hull by means of facet expanding, the physical model for the unstable state heat transfer of the ship with bulk structure has been obtained. The theoretically simulated infrared images have been calculated numerically..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 91 (2003)
IMPROVEMENT TO PROJECTION DETECTION OF SLOWLY MOVING POINT TARGET IN INFRARED IMAGE SEQUENCES
[in Chinese], [in Chinese], and [in Chinese]
The infrared image background is obtained by morphological filtering, and the infrared images are nomalized using the estimated noise mean and variance in a local window. Composite frame is formed by normalized image dara, and target detection is performed on the composite frame. Thus, target and noise statistics in a The infrared image background is obtained by morphological filtering, and the infrared images are nomalized using the estimated noise mean and variance in a local window. Composite frame is formed by normalized image dara, and target detection is performed on the composite frame. Thus, target and noise statistics in a composite frame are obtained. Considering the different distribution of noise and target intensity, the projection algorithm is further modifed to impove its signal to noise ratio. Simulations of real infrared images proved that the modified projection algorithm can successfully detect targets with SNR equaling 2..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 96 (2003)
ALGORITHM FOR MOTION PARAMETERS ESTIMATION IN IRST SYSTEMS
[in Chinese], and [in Chinese]
Based on parameterized model of target flight orbit, this paper presents an algorithm to estimate target range and other location and velocity via infrared sensor, according to this, target threat degree and target identity can be discriminated. Simulation calculation confirms that this method is more accuracy, and depBased on parameterized model of target flight orbit, this paper presents an algorithm to estimate target range and other location and velocity via infrared sensor, according to this, target threat degree and target identity can be discriminated. Simulation calculation confirms that this method is more accuracy, and depends less on a opriori knowledge of target location initial value. This algorithm can be used for target motion parameter estimation in other measure system..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 101 (2003)
A PROGRESSED MHT ALGORITHM FOR INFRARED TARGET TRACKING AND THE HARDWARE ARCHITECTURE ON DSP
[in Chinese], [in Chinese], and [in Chinese]
An improved multiple hypothesis tracking(MHT) algorithm and its application in infrared target tracking systems are presented. According to the characteristic of infrared target, the system firstly employs adaptive spatial preprocessing, then takes advantage of the improved MHT algorithm to recognize and track target. An improved multiple hypothesis tracking(MHT) algorithm and its application in infrared target tracking systems are presented. According to the characteristic of infrared target, the system firstly employs adaptive spatial preprocessing, then takes advantage of the improved MHT algorithm to recognize and track target. The pipeline hardware architecture is constructed based on 4 DSPs to implement the algorithm and acquires excellent result..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 105 (2003)
OPTICAL AND THERMAL DESIGN FOR MICROBOLOMETER
[in Chinese], [in Chinese], and [in Chinese]
Optical and thermal designs of microbolometer with four leg microbridge were described. The optical characteristic of multilayer structure consisting of SiO 2 infrared absorber film / poly Si thermosensitive film / SiO 2 support film was analyzed, and the influence of SiO 2 infrared absorber film thickness on multilayeOptical and thermal designs of microbolometer with four leg microbridge were described. The optical characteristic of multilayer structure consisting of SiO 2 infrared absorber film / poly Si thermosensitive film / SiO 2 support film was analyzed, and the influence of SiO 2 infrared absorber film thickness on multilayer structure average absorptirity was investigated. During thermal design, the average infrared absorptivity of microbolometer is not fixed as a constant but changed with thickness of absorber film, which is different from the conventional method. The optimized thickness of infrared absorber film and length of support leg were achieved through Finite Element Analysis software ANSYS5.7..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 109 (2003)
PERFORMANCE ANALYSIS ON THE SPATIAL SPECTRUM ESTIMATION OF A NOVEL ADAPTINE ANTENNA
[in Chinese], [in Chinese], and [in Chinese]
A novel multi beam adaptive antenna is constructed by means of Fresnel zone phasecorrecting focusing configuration and feeding array. The statistical characteristic of feeding array output and the ability for resolving coherent signals of this new adaptive antenna are analyzed by comparison with that of the uniform spaA novel multi beam adaptive antenna is constructed by means of Fresnel zone phasecorrecting focusing configuration and feeding array. The statistical characteristic of feeding array output and the ability for resolving coherent signals of this new adaptive antenna are analyzed by comparison with that of the uniform spaced linear array using spatial smoothing techniques for coherent signal identification. Then, the maximum likelihood function approach is exploited to perform the efficient eatimation in the direction of arrival(DOA) under wide angle multiple coherent signals incident, and to avoid the problems of the inherent field of view coming form MUSIC algorithm for bearing estimations. The result of simulation shown the good spatial spectrum estimation performance of the FZP antenna..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 114 (2003)
CALIBRATION SYSTEM FOR MMW RADIOMERER
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
An intelligent calibration system with temperature of blackbody naturally varying used for small antenna MMW radiometer was developed.All data acquirsition and analysis were automatically realized.The system was applied to calibrate a Dick 8mm radiometer. Main performances and calibration equation of the radiometed werAn intelligent calibration system with temperature of blackbody naturally varying used for small antenna MMW radiometer was developed.All data acquirsition and analysis were automatically realized.The system was applied to calibrate a Dick 8mm radiometer. Main performances and calibration equation of the radiometed were obtained. The precision analysis shows that the calibration uncertainty of antenna temperature is about 1.0582K..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 119 (2003)
COMPARISON OF INFRARED RADIATION SPECTRUM OF TRADITIONAL MOXIBUSTION,SUBSTITUTE MOXIBUSTION AND ACUPOINTS OF HUMAN BODY
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
By analyzing and comparing the infrared radiation spectrums of the traditional moxibustion, the substitute moxibustion and acupoints, it was found that there was a surprising consistency in the spectrums of three types of indirect moxibustion, namely separated with prepared daughter root of common monkshood, ginger andBy analyzing and comparing the infrared radiation spectrums of the traditional moxibustion, the substitute moxibustion and acupoints, it was found that there was a surprising consistency in the spectrums of three types of indirect moxibustion, namely separated with prepared daughter root of common monkshood, ginger and garlic, and the unified spectrum of acupoints of human body. Both had their peaks of radiation near 7.5μm. However, the spectrum of the substitute moxibustion was completely different from them. Its warming function was far less than the traditional moxibustion. And there was also a big difference between the infrared radiation spectrums of the moxa stick smoking and acupoints. The result indicates that in the therapeutic effect of traditional indirect moxibustion the sympathetic vibration of infrared radiation of indirect moxibustion and acupoints play an important role and the substitute moxibustion could not replace the traditional moxibustion in terms of the infrared characteristics of moxibustion..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 123 (2003)
NEW METHOD FOR 2D-EBG STRUCTRUES' RESEARCH
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The two dimensional (2D) EBG structure is measured and calculated by using of the suspending microstrip method (SMM). The characteristics of UC EBG and PV EBG are firstly measured and simulated by using of SMM. Comparing with other methods, the characteristic of 2D EBG is exhibited more obviously owing to use the stronThe two dimensional (2D) EBG structure is measured and calculated by using of the suspending microstrip method (SMM). The characteristics of UC EBG and PV EBG are firstly measured and simulated by using of SMM. Comparing with other methods, the characteristic of 2D EBG is exhibited more obviously owing to use the strongly coupling structures. The novel suspending patch EBG antenna is also presented. The compact structure of the antenna is more advantageous for EBG applications..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 127 (2003)
TWO-FREQUENCY SCATTERING CROSS SECTION AND PULSE BROADINGENING FOR THE FRACTAL SEA SURFACE WITH PULSE BEAM INCIDENCE
[in Chinese], and [in Chinese]
Based on the Kirchhoff approximation for the rough surfaces with small slopes, the electromagnetic scattering from the one dimensional fractal sea surface with the actual spectrum of the sea is studied by the pulse beam wave incidence. The distributions of the two frequency scattering cross section with different fractBased on the Kirchhoff approximation for the rough surfaces with small slopes, the electromagnetic scattering from the one dimensional fractal sea surface with the actual spectrum of the sea is studied by the pulse beam wave incidence. The distributions of the two frequency scattering cross section with different fractal dimension, incident angle and the center frequency are analyzed with millimeter wave incidence. The numerical result shows that there exists the largest coherence bandwidth for the two frequency scattering cross section at the specular direction. The coherence bandwidth will increase with decreasing the fractal dimension and with increasing the incident angle and the center freqquency. It also shows the scattering power which is a pulse shape but with a pulse broadening for the incident power being δ function, this pulse broadening is inversely proportional to the coherence bandwidth..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 132 (2003)
POLARIMETRIC CALIBRATION ON AIRBORNE REMOTE SENSING POLARIMETER
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Based on 3%～5% relative errors of retarder for λ /4 mica waveplate and different absorption coefficients for the light oscillating along the fast axis and slow axis of mica waveplates, a polarimetric calibration system of the extremum method was proposed, and the influence of both waveplate retarder and its different aBased on 3%～5% relative errors of retarder for λ /4 mica waveplate and different absorption coefficients for the light oscillating along the fast axis and slow axis of mica waveplates, a polarimetric calibration system of the extremum method was proposed, and the influence of both waveplate retarder and its different absorption coefficients on the output light intensity was analysed. Precision measurement results of waveplates in six channels were obtained. The polarized degrees for the ideal linear polarized light and non polarized light were calibrated on the basis of the above results, and the relative errors were less than 1%..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 137 (2003)
RESEARCH ON THE DATA PROCESSING METHOD OF SOLID PROPELLANT ROCKET ENGINE PLUME TEMPERATURE
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Considering the characteristics of the plume temperature measurement of solid propellant rocket engine, a new emissivity assumption was presented. Based on the assumption, a new data processing method of the multiwavelength pyrometer was introduced. By processing the measured data of the multiwavelength pyrometer at twConsidering the characteristics of the plume temperature measurement of solid propellant rocket engine, a new emissivity assumption was presented. Based on the assumption, a new data processing method of the multiwavelength pyrometer was introduced. By processing the measured data of the multiwavelength pyrometer at two different time, the true temperatures and spectral emissivities at two different time can be simultaneously calculated. The experimental results show that the temperature differences between the calculated values and the theoretical ones provided by the rocket engine designer are within ±20K. The above mentioned method is a practical data processing method of solid propellant rocket engine plume temperature..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 141 (2003)
MODELING AND SIMULATION OF MICROSCANNING IMAGING SYSTEMS IN SEVERAL PATTERNS
[in Chinese], and [in Chinese]
On the basis of the analysis of microscanning imaging, microscanning imaging systems in several patterns such as 1×1,2×2,3×3 and 4×4 were theoretically modeled and simulated with PTF.Finally, the simulation results were shown and analyzed.On the basis of the analysis of microscanning imaging, microscanning imaging systems in several patterns such as 1×1,2×2,3×3 and 4×4 were theoretically modeled and simulated with PTF.Finally, the simulation results were shown and analyzed..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 145 (2003)
ANALYSIS ON DISPERSION CHARACTERISTICS OF PHOTONIC CRYSTAL FIBER
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The dispersion properties of photonic crystal fiber (PCF) was analyzed by an effective refractive model, and the eigenvalue equation of the fundamental space filling mode in infinite air silica micro structure was presented. The analysis results show that PCF has unusual dispersion property, which can support single moThe dispersion properties of photonic crystal fiber (PCF) was analyzed by an effective refractive model, and the eigenvalue equation of the fundamental space filling mode in infinite air silica micro structure was presented. The analysis results show that PCF has unusual dispersion property, which can support single mode transmission in a very large wavelength range and have anomalous dispersion under singe mode operation. Zero dispersion wavelength can be shifted by adjusting the structure parameters of PCF. Finally, PCF with large air holes and its applications in dispersion compensation were also discussed..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 149 (2003)
A NOVEL VARIATIONAL ANALYSIS OF PLANAR LINE PROPAGATION CONSTANT
[in Chinese], and [in Chinese]
A novel stationary variational formula in spatial domain and in spectral domain respectively for calculation of planar line propagation constant is presented based on the exact theory of electromagnetic field. The formula only involves the electric field in the slot, which is applicable to closed as well as open planarA novel stationary variational formula in spatial domain and in spectral domain respectively for calculation of planar line propagation constant is presented based on the exact theory of electromagnetic field. The formula only involves the electric field in the slot, which is applicable to closed as well as open planar and coplanar line structure. The calculation is simple and fast. The result of slot line agrees well with that of spectral domain method..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 154 (2003)
A FREQUENCY MULTIPLIER-AMPLIFIER MODULE AT Ka-BAND
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The result of a frequency multiplier amplifier module at Ka band is reported. The function is to escalate the centimeter wave signal to Ka Band multiplied by FET and quadrupled by PHEMT. By using power amplifier to obtain the output frequency is between 24 GHz and 30.4 GHz, the best conversion gain is 16.6dB, the outpuThe result of a frequency multiplier amplifier module at Ka band is reported. The function is to escalate the centimeter wave signal to Ka Band multiplied by FET and quadrupled by PHEMT. By using power amplifier to obtain the output frequency is between 24 GHz and 30.4 GHz, the best conversion gain is 16.6dB, the output power is bigger than 50mw, and the best output power is bigger than 100mw. The frequency multiplier amplifier module at Ka band can supply good local oscillation source for the wireless communications..
Journal of Infrared and Millimeter Waves
- Publication Date: Apr. 01, 2003
- Vol. 22, Issue 2, 157 (2003)
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