Imaging technology

About: Imaging technology is a research topic. Over the lifetime, 1450 publications have been published within this topic receiving 26186 citations.

Long-range range-gated laser active imaging experiments

Abstract: Range-gated laser active imaging technology can apparently advance the imaging and identification performance for long-range dim target. In the atmospheric conditions, the range-gated imaging system performance is generally affected by many factors, such as wind, visibility, and so on. These influences are more apparent when the laser path is long. To study the long-range performance of the range-gated imaging system, we carried out a series of outfield experiments using an active imaging prototype system designed by ourselves. The laser active imaging prototype system includes a YAG laser, an intensified CCD (ICCD), several lenses for imaging, time control board, and image collecting system. To test the prototype system's performance and the influence factors, we chose many long range targets on the hills around our lab and carried out lots of experiments. To test the visibility influence on the system, we fixed the prototype system and chose a 3.7km telegraph pole as the target, and carried out imaging experiments in several days in different weathers. To test the gated performance, we chose four close targets all in one sight about 4.2km far away, and got each target image separately by adjusting the delay time. We get clear laser image of the beacon tower on the Great Wall in 10.9km far away, and the farthest target we got was the mountaintop distance of 21km. By analyzing the result, we get more knowledge about the ranging and imaging performance of the laser active imaging system, and the experiment data is helpful for system design and application in the future.

Research on Infrared Polarization Imaging Technology

Abstract: Polarization imaging technology is an important research aspect of imaging technology in China andforeign countries, which has important application value. The principle, composition and characteristics of infraredpolarization imaging system are introduced. The research status of the technology in China and foreign countries isintroduced. The potential advantages on manual target identification of MIR/LIR polarization imaging devices andinfrared polarization imaging technology are analyzed. Finally, the development of infrared polarization imagingtechnology is forecasted.

Non-Scanning Three-Dimensional Imaging System with a Single-Pixel Detector: Simulation and Experimental Study

Abstract: Existing scanning laser three-dimensional (3D) imaging technology has slow measurement speed. In addition, the measurement accuracy of non-scanning laser 3D imaging technology based on area array detectors is limited by the resolution and response frequency of area array detectors. As a result, applications of laser 3D imaging technology are limited. This paper completed simulations and experiments of a non-scanning 3D imaging system with a single-pixel detector. The single-pixel detector can be used to achieve 3D imaging of a target by compressed sensing to overcome the shortcomings of the existing laser 3D imaging technology. First, the effects of different sampling rates, sparse transform bases, measurement matrices, and reconstruction algorithms on the measurement results were compared through simulation experiments. Second, a non-scanning 3D imaging experimental platform was designed and constructed. Finally, an experiment was performed to compare the effects of different sampling rates and reconstruction algorithms on the reconstruction effect of 3D imaging to obtain a 3D image with a resolution of 8 × 8. The simulation results show that the reconstruction effect of the Hadamard measurement matrix and the minimum total variation reconstruction algorithm performed well.