Infrared images typically exhibit a high dynamic range, necessitating the utilization of an appropriate compression technique to prevent the loss of original information. This preservation of data is crucial for subsequent feature extraction, recognition, and tracking processes. In this paper, we introduce a digital detail enhancement technique specifically tailored for infrared images, leveraging the Gaussian filter. The Gaussian filtering process effectively separates the background layer from the detail layer of the image. Subsequently, the background layer undergoes gray level enhancement, while the detail layer undergoes detail enhancement and noise suppression. Finally, based on the overall dynamic range of the image, both the background and detail layers undergo compression and adjustment, leading to a further enhancement in image contrast. Experimental results demonstrate that the proposed method successfully improves image contrast and presents more detailed information, thus contributing to the accurate and reliable processing of infrared images.
With the deepening of the related research work of atomic force microscope (AFM), people can not only be satisfied with the morphology measurement function of AFM. [1,2] How to use AFM to carry out micro force measurement has gradually become one of the hotspots of AFM application research. Among them, the elastic coefficient of AFM micro cantilever is an important bridge connecting the AFM input signal and the force on the needle tip. [3] Therefore, the measurement of elastic coefficient of micro cantilever is an important premise for micro force measurement using AFM. According to the characteristics of rectangular micro cantilever and the practical problems faced in AFM measurement, the measurement technology of elastic coefficient of AFM micro cantilever based on nano indentation measurement technology is studied in this paper. The theoretical analysis and experimental results show that the nano indentation method can be used to calibrate the elastic coefficient of micro cantilever.
Hardware in the loop simulation test technology of electro-optic system includes video injection technology and dynamic projection technology. Firstly, the dynamic infrared scene simulation technology is used to generate missile attack and complex jamming scene images; Secondly, the digital video is injected to simulate the front-end sensor and stimulate the integrated processor to detect and track the target; Finally, the large field of view medium wave infrared dynamic target simulator is used to build the missile threat environment to carry out the functional performance test of electro-optic system under the threat of single/multi-target attack. The experimental results show that the technology can build complex scenes according to the battlefield scenario, test the processing capacity of electro-optic system under the threat of single/multi-target attack, support the verification of search, acquisition, tracking and other performance indicators of electro-optic system, and provide support conditions for the development and debugging of core algorithms of electro-optic system.
In this paper, several test methods provided in this standard are analyzed, and the influence of the attenuation amount introduced in the test process on the test results of laser divergence angle is analyzed. Considering the test error introduced by attenuation, a method to eliminate this error is proposed, which provides the basis for accurate measurement of divergence angle.
This paper introduces a simulation system for laser remote ranging. The device provides a simulation range of more than 300km, which can realize multiple echo pulses and conduct the test of the verification period maximum range of the remote ranging algorithm. The device accuracy simulates the distance up to 150m, error of 0.9m. The width of the echo pulse can vary depending on the transmission distance and the target characteristics. Considering the simulated distance measurement of the dynamic target, the change of the echo pulse return moment corresponds to the target movement speed, the ranging algorithm of the dynamic target can be verified.
Resolution is one of the important performance indicators of the visible light observation system's ability to identify targets. It is usually detected by the visible light performance test equipment in the laboratory, but the experimental environment is relatively ideal, and the influence of atmospheric factors on the television observation system is not considered. Therefore, this paper proposes a visible light target with adjustable brightness angle, which is the resolution of VISIBLE LIGHT observation system under different weather conditions The outdoor test provides conditions for the development of identification ability related detection work.
Ranging ability is one of the core indicators of laser ranging equipment. The actual ranging test has certain requirements for the visibility conditions and cooperative targets. Generally, there is no suitable cooperative target for ranging, which affects the acquisition of real sample data or the assessment of actual ranging ability. In this paper, a mobile laser ranging cooperative target is proposed, which can effectively establish the ranging environment in the real scene It provides strong support for the debugging and testing of laser ranging equipment.
KEYWORDS: Target detection, Computer simulations, Control systems, 3D modeling, 3D acquisition, Structural design, Finite element methods, Spindles, Motion models
The recognition and tracking ability[1-4] of detection equipment in the process of relative movement with the observed target is always one of the key research contents and important research directions of photoelectric detection technology. Aiming at the relative angular position between the target and the detection equipment, this paper designs a kind of relative motion simulation equipment which can independently control the bearing two axes. The motion range of the platform carrying the measured equipment can reach ± 120° , the positioning accuracy is better than 10 ″ , the maximum angular velocity and angular acceleration can reach 60°/ s and 40°/s2 respectively. The target motion range can reach ± 150° , the positioning accuracy is better than 10 ″ , and the maximum angular velocity and angle acceleration can reach 60°/s and 60°/s2 respectively.
This paper presents a retractable infrared laser characteristic fusion target design configuration. In this configuration, the folding mechanism provides the retraction and playback function to drive the simulated target to extend in the length direction, and the extension length can be adjusted according to the background and scene requirements. The simulated target has both infrared and laser characteristics, which can provide a fixed laser reflectivity and cross-sectional area of the characteristic body target. At the same time, the characteristic body target has infrared radiation characteristics of 3~5um and 8~12um bands, respectively, for detection and recognition of high-sensitivity infrared detector, and for the verification of laser range finder's ranging ability.
KEYWORDS: Control systems, Gyroscopes, Control systems design, Structural design, Navigation systems, Finite element methods, Safety, Servomechanisms, Human-machine interfaces, Error analysis
Gyro stabilized platform is sensitive to external angle change, and is mainly used to effectively isolate the influence of angle disturbance on the attitude maintenance of stabilized platform[1-3]. In order to provide the simulation environment of external angle disturbance for the stable platform[4], this paper designs an azimuth and pitch two-dimensional angular motion excitation device, which can effectively simulate the low-frequency angular disturbance condition below 20Hz. The angular motion range can reach ±50°azimuth, and the pitch axis can reach ±70°. The positioning accuracy is 10″. The device provides a good man-machine interface, which can display the motion data of each axis in real time. At the same time, considering the safety of use, the design has electrical, software and mechanical multi-level limit measures, which can realize automatic monitoring and system protection.
KEYWORDS: Infrared radiation, Ranging, Temperature sensors, Temperature metrology, Resistance, Laser optics, Copper, Platinum, Infrared lasers, Control systems
In this paper, a design configuration of infrared guiding source for laser cooperative target is proposed. In this configuration, the infrared radiation target surface can effectively reduce the heat dissipation speed and ensure the uniform distribution of temperature radiation at the edge and the center by setting a wind shield, an independent edge circular electric heating film and a temperature PID control loop. It can provide effective infrared characteristic target for infrared / laser common optical path ranging system and guide laser ranging accurately.
Vibration is one of the main factors that greatly affect the tracking and stability of photoelectric detection. With the development of technology for many years, the simulation of vibration conditions has gradually developed from single line vibration or angle disturbance to line angle compound vibration. In this paper, the working principle and application of two kinds of multi-degree of freedom line-angle composite vibration system are introduced, and the differences between the two main mechanisms and simulation systems are compared and analyzed, which provides a theoretical support for the photoelectric detection technology to carry out the vibration reproduction test in the laboratory.
In order to improve the readability of infrared image, this paper proposes an image fusion algorithm based on the characteristics of the target region. The algorithm uses wavelet transform to decompose the multi-source image, and uses image segmentation algorithm to extract the target features of the multi-source image, and then uses different fusion strategies to fuse the infrared image and the visible image according to the features of the infrared image extraction and the low-frequency and high-frequency components of the visible image in different regions. The simulation results show that the algorithm can achieve better image fusion results.
The detection, recognition and tracking of moving targets are important research contents of photoelectric detection technology, and the evaluation of tracking performance needs corresponding test and verification environment. In this paper, a high stable angle motion simulation device of infrared/visible target is designed. The tested product and the optical axis of infrared/visible target are quickly aligned by optical alignment device. At the same time, the angular motion simulation device can accurately measure and control the position, angle and angular acceleration information of the target relative to the tested product, and the angular motion range can reach 360° forward and reverse continuous rotation. The design can effectively simulate the target's one-dimensional angular motion environment in the laboratory, and provide test conditions for the tracking performance evaluation of photoelectric detection technology.
In the infrared detection and imaging system, due to the influence of detector aperture, system imperfection, measurement noise and other factors, the infrared detection image usually has the disadvantages of low contrast, poor signal-to-noise ratio, blurred visual effect and so on. In order to solve this problem, this paper proposes an infrared image denoising and enhancement algorithm based on the guidance filter. The algorithm realizes a linear shift local linear filter by introducing the guidance image as the prior information, so as to enhance the edge details of the infrared image and remove the image noise at the same time. The simulation results show that compared with the traditional denoising and enhancement algorithm, this method can effectively improve the visual effect of infrared detection image, enhance the edge detection information of the target, and has the advantages of fast processing speed.
The infrared dynamic scene projector is a key component of the infrared imaging seeker semi-physical simulation system. Aiming at the long-wave infrared imaging seeker system, the design idea of long-wave infrared dynamic scene projector with IR-CRT as the core device was proposed. The working principle of IR-CRT was introduced. The optical collimation system was designed. The key parameters such as resolution, distortion, simulated temperature range and uniformity were tested. The dynamic scene projector had been successfully applied to infrared imaging seeker. The semi-physical simulation system had verified the static and dynamic tracking performance of the infrared imaging seeker, which met the requirements of product use, and promoted the product development process.
This paper presents a portable infrared/visible composite target simulator design configuration. The system adopts reflective optical design, through the combination of blackbody and visible light source system design and a variety of target plate, it can provide 0.4μm~12μm band simulation target, with parallel difference better than 10″ and 200mm optical aperture. It provides a variety of quasi-direct simulation targets for infrared and visible performance and dynamic tracking test of photoelectric detection equipment.
In this paper, an over-top tracking test system for electro-optical detection device is designed, which provides an overtop test environment for electro-optical detection device by using a two-dimensional motion turntable covering the target source of the infrared and visible light bands in a rolling and pitching shafting system. The electro-optical detection device for two-frame configuration provides over-top tracking[1] function and performance testing and verification conditions.
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