Results 11 to 20 of about 578,588 (318)

Analysis of the measurement capability of optical fringe projection systems [PDF]

, 2022
S.728-736Quality control describes numerous methods for monitoring the quality of a production process. With respect to this it will be a growing requirement on optical 3D-measurement techniques to reach the demands of the measurement capability.
Heinze, M., Kühmstedt, P., Gerber, J., Notni, G.   +3 more
core   +1 more source

Computational Imaging for Simultaneous Image Restoration and Super-Resolution Image Reconstruction of Single-Lens Diffractive Optical System

Applied Sciences, 2022
Diffractive optical elements (DOEs) are difficult to apply in natural scenes imaging covering the visible bandwidth-spectral due to their strong chromatic aberration and the decrease in diffraction efficiency.
Kai Liu, Xiao Yu, Yongsen Xu, Yulei Xu, Yuan Yao, Nan Di, Yefei Wang, Hao Wang, Honghai Shen   +8 more
doaj   +1 more source

Hyperspectral Anomaly Detection with Differential Attribute Profiles and Genetic Algorithms

Remote Sensing, 2023
Anomaly detection is hampered by band redundancy and the restricted reconstruction ability of spectral–spatial information in hyperspectral remote sensing.
Hanyu Wang, Mingyu Yang, Tao Zhang, Dapeng Tian, Hao Wang, Dong Yao, Lingtong Meng, Honghai Shen   +7 more
doaj   +1 more source

Infrared Dim Small Target Detection Based on Nonconvex Constraint with L1–L2 Norm and Total Variation

Remote Sensing, 2023
Infrared dim small target detection has received a lot of attention, because it is a crucial component of the IR search and track systems (IRST). The robust principal component analysis (RPCA) is a common detection framework, which works with poor ...
Yu Shao, Xu Kang, Mingyang Ma, Cheng Chen, Sun He, Dejiang Wang   +5 more
doaj   +1 more source

Multi-Objective Parametric Optimization Design for Mirrors Combined with Non-Dominated Sorting Genetic Algorithm

Applied Sciences, 2023
The process of intelligent multi-objective parametric optimization design for mirrors is discussed in detail in this paper, with the error of the mirror surface shape and the total mass being examined as the optimization objectives.
Lu Sun, Bao Zhang, Ping Wang, Zhihong Gan, Pengpeng Han, Yijian Wang   +5 more
doaj   +1 more source

Broadband Backhaul Communication for Stratospheric Platforms: The Stratospheric Optical Payload Experiment (STROPEX) [PDF]

, 2006
A high bitrate optical downlink was performed by the stratospheric optical payload experiment (STROPEX), a part of the EU CAPANINA project. The STROPEX objectives were to design and build the necessary hardware to demonstrate an optical backhaul downlink
Knapek, Markus, Markus Knapek, Martin Brechtelsbauer, Joachim Horwath, Horwath, Joachim, Wilkerson, Brandon, Brandon Wilkerson, Brechtelsbauer, Martin, Bernhard Epple, Epple, Bernhard   +9 more
core   +1 more source

Optical High-Capacity Satellite Downlinks via High-Altitude Platform Relays [PDF]

, 2007
Earth-observation (EO) satellite missions produce a large amount of data using high-resolution optical or radar sensors. During the last decades the amount of data has steadily increased due to improved sensor technologies with increased temporal ...
Florian Moll, Bischl, Hermann, Markus Knapek, Giggenbach, Dirk, Joachim Horwath, Horwath, Joachim, Courville, Nicolas, Knapek, Markus, Bernd Epple, Moll, Florian, Nicolas Courville, Hermann Bischl, Epple, Bernhard, Dirk Giggenbach   +13 more
core   +1 more source

Results of the Optical Downlink Experiment KIODO from OICETS Satellite to Optical Ground Station Oberpfaffenhofen (OGS-OP) [PDF]

, 2007
Optical LEO downlinks from the Japanese OICETS to the optical ground station built by the German Aerospace Center (DLR) near Munich have been performed. This was the first optical LEO downlink on European grounds.
Perlot, Nicolas, Giggenbach, Dirk, Takayama, Yoshihisa, Horwath, Joachim, N. Perlot, Brechtelsbauer, Martin, Y. Takayama, Knapek, Markus, D. Giggenbach, Jono, Takashi, J. Horwath, M. Brechtelsbauer, T. Jono, M. Knapek   +13 more
core   +1 more source

Practical Calibration Method for Aerial Mapping Camera Based on Multiple Pinhole Collimator

IEEE Access, 2020
Calibration of aerial mapping camera has an important influence on the applications of earth observation. However, the traditional aerial mapping cameras calibrations depend on large-scale calibration target or collimated light, moreover, it is difficult
Guoqin Yuan, Lina Zheng, Jianjun Sun, Xueji Liu, Xue Wang, Zhuang Zhang   +5 more
doaj   +1 more source

A room-temperature, high-sensitivity Golay-type terahertz array detector in optical readout [PDF]

AIP Advances
We present a micro-structured Golay-cell THz array detector with the sensitive mechanism from the THz optical radiation to thermal absorption, to pressure deformation, and then to optical phase, realizing highly sensitive, room temperature operation. The
Li Zhao, Yuting Huang, Lingzhi Liu, Ben Tu, Qian Wang, Kai Shi, Weiguo Liu, Haifeng Liang   +7 more
doaj   +1 more source