Stereo calibration of binocular ultra-wide angle long-wave infrared camera based on an equivalent small field of view camera

2020 ◽  
Vol 67 (4) ◽  
pp. 297-306
Author(s):  
Ziang Wang ◽  
Bingqi Liu ◽  
Fuyu Huang ◽  
Yichao Chen ◽  
Shuai Zhang
Keyword(s):  
Infrared Camera ◽  
Field Of View ◽  
Wide Angle ◽  
Small Field ◽  
Long Wave ◽  
Stereo Calibration ◽  
Long Wave Infrared ◽  
Small Field Of View

Corners positioning for binocular ultra-wide angle long-wave infrared camera calibration

Optik ◽  
2020 ◽  
Vol 206 ◽  
pp. 163441
Author(s):  
Ziang Wang ◽  
Bingqi Liu ◽  
Fuyu Huang ◽  
Yichao Chen ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Camera Calibration ◽  
Infrared Camera ◽  
Wide Angle ◽  
Long Wave ◽  
Long Wave Infrared

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

Improvement in imaging common temporal bone pathologies at 3 T MRI: small structures benefit from a small field of view

2017 ◽  
Vol 72 (3) ◽  
pp. 267.e1-267.e12 ◽  
Author(s):  
M. Schulze ◽  
K. Reimann ◽  
A. Seeger ◽  
U. Klose ◽  
U. Ernemann ◽  
...  
Keyword(s):  
Temporal Bone ◽  
Field Of View ◽  
Small Field ◽  
Small Field Of View

scholarly journals Study on project trajectory of air-to-ground missile with strapdown seeker under multi constraints

2021 ◽  
Vol 39 (1) ◽  
pp. 141-147
Author(s):  
Junmin Zhao ◽  
Cong Nie ◽  
Guannan Chang ◽  
Meibo Lyu ◽  
Xinguo Li
Keyword(s):  
Good Condition ◽  
Field Of View ◽  
Small Field ◽  
Target Acquisition ◽  
Moving Targets ◽  
Proportional Navigation ◽  
Terminal Stage ◽  
Guidance Law ◽  
Terminal Guidance ◽  
Small Field Of View

The air-to-ground missile with strapdown seeker may have the problems, including small field of view(FOV), limited overload, and fall angle constraint. To solve the above mentioned problem, a phased guidance scheme is proposed. In this scheme, the attack trajectory is divided into the following six stages, including glided stage, fall angle constraint stage, target acquisition and adjustment stage, terminal guidance stage and blind zone stage. The glided stage is designed to increase range, the terminal fall angle is attained ahead of time at fall angle constraint stage. The aim of target acquisition and adjustment stage is to adjust the missile attitude, so that the target will fall within the FOV of the seeker. It creates good condition to capture the target for strapdown seeker. In the terminal stage, the guidance law of proportional navigation and attitude track are used to fit the needs of FOV constraint and attack accuracy. The simulation result shows that the project trajectory can solve the application of attacking moving targets for air-to-ground missile with strapdown seeker under multi constraints.

Transmission Microscopic Moire´ Interferometry for Nanoscale Deformation Measurements

2003 ◽  
Author(s):  
C. W. Han ◽  
S. Cho ◽  
B. Han
Keyword(s):  
Spatial Resolution ◽  
Optical Method ◽  
Moiré Interferometry ◽  
Field Of View ◽  
Moire Interferometry ◽  
Small Field ◽  
Accurate Analysis ◽  
Full Field ◽  
Deformation Measurements ◽  
Small Field Of View

Moire´ interferometry is a full-field optical method that has high displacement, strain and spatial resolution. The method has been used extensively for deformation analyses in the various fields of mechanics. Special considerations arise when deformation measurements of tiny specimens or tiny regions of larger specimens are sought. The relative displacements within a small field of view will be small (even if the strains are not small), so the number of morie´ fringes might not be enough for an accurate analysis.

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