The research on characteristic of the all-sky background brightness on day is developed. The sky background brightness is measured, the measurement data is analyzed. Based on the MORTRAN software, a corrected method to consummate the all-sky background brightness is given. The consummated all-sky background brightness data is applied to analyze detecting process, the applying result inosculates to the practicality situation which indicates that the consummated method can satisfy the requirement for application.

The study of target detecting methods based on hyper-spectrum theory have been made. The methods such as optimal abstraction of target from background, minimum noise fraction and target detecting by unmixing are brought forward and used in detecting target. The methods are validated in the hyper-spectrum image remote sensing experiments, which successfully pick-up target from nature feature.

Starting from the principle of infrared suppression, and through analyzing the approach of infrared suppression, the paper proposes periodic nanostructure infrared radiation suppression and efficient thermal conductivity heat radiation suppression exploratory. Analyzing the features of periodic nanostructure materials and heat pipe inhibition technology, and establishing the infrared suppression model, the feasibility of realization of target infrared suppression was verified by numerical calculation.

Study on measuring repeating projectile velocity and firing rate is an important problem for shooting range test. An area cut velocity measuring system based on four light screens was introduced. Output waveform characteristics of the projectile were analyzed, front edge analysis method were used to conform the characteristic point of output waveform, and signal matching method used to conform the characteristic point of output waveform with vibration signals. A measuring software based on vc++ development environment was programmed，using software to process the waveform date to obtain velocity and firing rate of repeating projectile. The experimental results show that the laser screen measuring system is easy to operate, test results are accurate.

Taking the Honywell’s HMR3000 electronic compass for example，the characteristics of the electronic compass, the principle of direction finding, and jamming analysis are introduced. The problem of increasing direction finding errors for the electronic compass used on vehicular turret is analyzed with an engineering application instance. And several solutions are proposed from the following aspects such as application, software and design. Test validated these solutions′ effectiveness.

Based on the thermodynamics principle, a simple thermal model of steel plate and rubber cloth was established, thus their temperature changes in a day are calculated. The results show that the surface temperature of the rubber cloth can be acquired by solving the thermal equilibrium equation; the steel plate thickness can strongly affect the plate temperature changes within a day. (The thicker the plat, the smoother the temperature change is, and the more thin, the more it approaches to nature rubber. )The surface emissivity affects the temperature of the steel plate or the rubber cloth in the same way but the absorbing factor plays the opposite effect on the steel plate or the rubber cloth compared with the emissivity and it affects merely in daylight.

Restraint of background noise, for example water interference, is an important problem for laser backward detection of bubble films in water. The problem was analyzed and an experiment was carried out. The powers of light backward scattered from water and bubble film were measured when the distances between the laser and the detector were changed, and the data were analyzed by comparison. The results show that moderately increasing the distance between laser and detector will favor restraint of water backward scattering light interference and will enlarge the difference between signals having and having no bubble films, so it will improve the laser backward detection capability of bubble films in water.

For the purpose of evaluating the effectiveness of the various camouflage methods, the Automatic Target Recognition (ATR for short) system technology is put forward. The paper presents some aspects of the reconnaissance detection algorithm, detection ranges for hypothesis target and the influence to the Camouflage Effectiveness Evaluation. The collected images can be identified and processed. According to the detector and reconnaissance system parameters, the ATR algorithm can report the detection range for each hypothesis target and its confidence. Based on this basis, the automatic detection and identification of camouflage targets become more reasonable and effective. Determination of the detection range could be considered as an additional criteria for camouflage evaluation.

Injecting light from laser diode (LD) into fiber is the precondition of researching fiber optical laser and fiber optical amplifier. Single-tube diode, LD bar, LD two-dimensional stack and LD array all belong to LD, their coupling technologies are different and related. This paper introduces and analyzes the representative LD tube’s coupling technology such as cylindrical wedge method, V-groove method, micro-lens method; LD bar’s coupling technology such as optical fiber bundle coupling method, beam shaping method; and coupling technology of LD 2D stack and LD array with optical fiber. The common points of these methods are compared for the choice and reference of future researchers.

For improving the strain response sensitivity, this article proposes one fiber grating strain sensor based on titanium alloy substrate. The package uses titanium (TC4) as packaging material according to the theory of elastic modulus and uses barbell-like structure according to the transfer principle of mechanics. It obtains the strain response sensitivity and the correlation coefficient of reflection wavelength and strain. Experimental results show that the sensor which adopts this package design can obtain higher strain response sensitivity and better correlation coefficient of reflection wavelength and strain

Semiconductor laser (LD) drive circuit required to provide enough current and working state is stable. According to semiconductor physics theory, the relationships of junction voltage, junction current and junction temperature is analyzed. Experiments on LD in dual tracking power supply constant current mode and driven by LT1912 switching power supply were made. Experimental results show that LD drive circuit of work conditions is to provide sufficient current----the switching power supply drive LD must have the output characteristics of low voltage and high power. The advantages for switching power drive LD is simple in circuit design, and working conditions are very stable. With increasing chip performance, switching power supply will be widely used.

Taking the 640×512 array device in a circular cold shield for example,the radiation from inner wall surface of the cold shield can be abstracted into a certain amount of geometric rays which could be generated randomly with MATLB. Through tracing their directions, the numbers of rays that projected directly or fallen after a reflection into the pixels of detector can be obtained. The distribution of radiant rays from inner wall surfaces of cold shield can be analyzed with histogram and spot diagram.

Six current types of A/D converters were introduced, including working principle, circuit structure, performance characteristics and application field. Through analyzing the conversion rate, conversion accuracy, resolution, power consumption, price, size and other indicators, comparing the physical structure design with the actual performance, their appropriate applications were finally summed up. Then, based on the technical characteristics of the existing A/D converters and performance requirements in practical application of the A/D converters, the technology trends of higher performance, lower power and simpler structure on A/D converters are predicted.

A design program of video capturing system based on PC104 is presented and a specific realization method of video capture card with PC104 interface based on FPGA is given. Two SRAM are used to do ping-pang operation for video caching, which reduces design cost. Communication is realized between video capture card with PC104 interface and host with Vxworks system, and the capture, display and save of the video are realized.

In the process of Mask Projection Stereolithography (MPS), the value of illumination on the view surface of MPS has serious influence on building accuracy. In order to improve the building accuracy of MPS, it is necessary to measure the illumination accurately. An illumination measuring system with Silicon Photocell is designed and developed. The system uses photocell to convert light signal into weak current signal, which is then sent to micro control unit in the form of voltage signal to carry out A/D conversion after I/V switching and amplification, and then the system calculates the actual illumination value according to the digital value and the linear sensitivity of Silicon Photocell. For adjusting gain of the amplification circuit automatically, the system adopts digital potentiometer as feedback element. The illumination value on the view surface of MPS is measured by the system, measured data is fit with MATLAB, and the relationship between illumination and gray is established in order to adjust illumination distributing on the view surface of MPS by changing gray.

A set of navigation system of smart car based on the dual S08 microchip was designed to provide navigation data for the smart car. The navigation system uses two low-price 8bit microchip to replace traditional high performance 16bit microchip which could deal with the multi-event simultaneously, and realizes the function to store the image data automatically. The result approves its validity and reliability. On the other hand, it also provides us with a new low cost way of collecting image information.

A new edge detection algorithm based on generalized B spline filter is proposed to extract image edge more effectively. First, generalized B spline is deduced from linear derivative equation. Based on generalized B spline, a difference template operator for edge detection is constructed, which inherits the scale factor of generalized B spline, and achieves different amplitude characteristic and band-pass property with different scale factor. Therefore, best edge result can be obtained by adjusting the scale. Thereafter, by combination with generalized B spline function and variational principle, generalized B spline smoothing filter is constructed, which realizes the direct spline transform in the sense of smoothing filtering, and improves the anti-noise ability of edge detection in conjunction with edge detection template operator. Experiments indicate this algorithm can extract target edge reliably, whether its extraction effect or anti-noise capacity are superior to conventional differential operator.

The effectiveness of one de-noising method for different noise images is different, a method based on wavelet domain for identifying image noise types was used. The histogram of wavelet HH sub-band’s coefficients was used to identify two types of main noise: Gaussian white noise and salt & pepper noise. After analyzing the infrared image series, it is found that the long-wave infrared images are mainly affected by the Gaussian white noise, the medium-wave infrared images are mainly affected by the salt & pepper noise. An improved wavelet global threshold de-noising method is reported. The simulation experiments indicate that the PSNR of this method is increased by 2～3 dB, processing speed is more faster, compared with traditional methods.

Image matching is a basis in the image processing and computer vision field, it comes from a number of practical problems. The primary task of Point feature matching is to extract the stability features, and to describe them. These features can maintain certain invariance to the image changes factors, such as rotation, zoom scale, affine transformations, and perspective changes, light changes etc., to the object movement, occlusion, noise and other factors can also maintain good matching. A point-based scale and rotation invariant feature transform algorithm for the sub-pixel image registration is proposed. First of all the feature detection and identification are made in the scale space, the position and scale of key points are determined, and then use main direction of the neighborhood's gradient as the direction of the key point in order to achieve the independence of the operator of the scale and direction. The method is invariance to rotation, scale scaling and brightness changes, else maintaining a certain degree of stability to changes of perspective, affine transformation and noise. It is unique, informative and suitable for fast and accurate matching in the mass characteristics database. Being high-speed, the matching algorithm can achieve real-time requirements.

The operation effectiveness evaluation of EW system is an important subject in the field of EW. According to the concept of EW system operation effectiveness, three evaluating methods including AHP, fuzzy judgment and grey theory are introduced, their advantages and shortcomings are analyzed. Mastering these methods skillfully, we can provide the credible and exact data for developing, identifying and using EW systems.

The necessity of the pointing accuracy measurement of scanning type infrared detecting system was described and analyzed, and a method of pointing accuracy measurement of scanning type infrared detecting system was put forward. Colligating the advantages of infield and outfield measurement，the method reduces the error caused by the detecting equipment error and improper detecting method in the whole process of measuring. The reason and the result of the error were analyzed. The method is beneficial to high precision measurement and correction of the pointing accuracy of scanning type infrared detecting system.

The simulation frame based on the photoelectricity scene system of HLA is introduced, using the technology of VEGA scene simulation to design and exploit the photoelectricity scene, and aiming at some pivotal technology in the scene simulation such as the control of model motion and granule system motion, the correlative solutions are given. And then, the two simulation circulate mechanism, HLA and Vega, are coalesced together to obtain the integrated simulation process.