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Streak Tube Imaging Lidar (STIL) is a promising imaging system as its high frame rate and good image quality, which can help SAR image the short scale ocean wave. In this paper, we based on laser radar equation, simulate streak imaging of short scale ocean wave by the optical scattering model. Through the experiment in Yellow Sea in China, we get the real short scale ocean wave images by using STIL...
Slit Streak Tube Imaging Lidar (STIL) is a promising imaging system as its high frame rate and good image quality. As its important applications, the depth under the water to detect a underwater target near the coast is less than 20m. It can effectively indemnify the safety of ships. We use a Slit Streak Tube Imaging Lidar, including a laser whose wavelength is 532nm and the energy of one pulse is...
The resolution of a terahertz scanning imaging system based on a CO2 pumped continuous-wave terahertz laser at 2.52 THz was measured. A self-made resolution test chart was employed and scanned. The imaging results show that the system's resolution is 0.6 mm. The experiment results are also compared with the results of another point-by-point scanning imaging system. The study can make a contribute...
Terahertz (THz) radiation can penetrate nonmetallic materials and nonpolar materials, and has low photon energy, therefore THz imaging has drawn more attention. The moment function of an image has wide applications on pattern recognition and target classification. The paper has applied image segmentation to Continuous-Wave THz point-to-point scanning reflecting image depending on Otsu's method. The...
Sensory neural prostheses aim to restore lost sensory function by using electrical stimulation to deliver information about the external sensory environment. However, current electrical stimulation techniques suffer from a lack of stimulation specificity on a single electrode and complicated neural interactions from stimulation across multiple electrodes. Here we present the construction and validation...
In this paper, we propose a novel imager that can acquire super-resolution (SR) images with significantly fewer sensors. The theoretical basis of this imager is compressive sensing (CS) theory, which calls for a measurement matrix with good properties for effective reconstruction, such as RIP. Such a property indicates that entries of the received signal are effectively aliased. In our imager we use...
Synthetic Aperture Radar (SAR) can acquire the ocean wave spectrum in the wide-range area, and it can recognize the complicated space structure of the ocean wave. However, because the wavelength of SAR is long, its space resolution is not enough to analyze the micro-scale wave of the ocean surface. In the paper, Streak Tube Imaging Lidar (STIL) is presented firstly to collect the 4-D image (3-D range...
The quantum genetic algorithm is a fast algorithm for searching global optimal solution of a function, being proposed in recent years. The algorithm introduces the method of quantum, which makes the algorithm has high parallelism in solving problems. So the algorithm can be used to the quick searching. In this paper, the algorithm is introduced to target seeking of the ladar imagery. Through theoretical...
This paper presents the application of electro-absorption modulated laser (EML) in spacial analog imaging system. Research on the characteristics of analog modulation and impact on imaging system is done and the result is given.
THz laser can penetrate a wide range of materials which are opaque to visible and near infrared light. So THz imaging has been an important research direction nowadays. When using the THz imaging methods of point-by-point scanning transmission, the laser output power’s fluctuation has a big influence on the imaging quality, which is the main source of the imaging noise. In this paper, the influence...
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