Algorithms for fast axisymmetric drop shape analysis measurements by a charge coupled device video camera and simulation procedure for test and evaluation

2001 ◽  
Vol 72 (6) ◽  
pp. 2784-2791 ◽  
Author(s):  
Lorenzo Busoni ◽  
Marcello Carlà ◽  
Leonardo Lanzi
1989 ◽  
Vol 13 ◽  
pp. 117-119
Author(s):  
Keishi Ishimoto ◽  
Masao Takeuchi ◽  
Shigeyuki Naitou ◽  
Haruki Furusawa

A new visibility-range measuring system has been developed which uses a video camera, and with which visibility can be estimated by measuring the brightness contrast of a black target against a standardized background. This principle has been applied to development of the new visibility-range monitor described in this paper. In this monitor, a charge-coupled device (CCD) video camera measures the brightness of an arbitrary area in its range of vision, and visibility range measured by the video camera in blowing snow can be compared with that measured by the transmissometer-type visibility-range monitor and can also be calculated by direct observation using optical targets. The new sytem can monitor visibility and record information about traffic on highways at 1 s intervals for a maximum of six separate positions. The vertical distribution of visibilities over a snow surface has been observed, and it has been found that the fluctuation in visibility is greatest at lower levels above the ground in blowing snow.


1991 ◽  
Vol 35 (6) ◽  
pp. 766-770 ◽  
Author(s):  
W. van der Vegt ◽  
H. C. van der Mei ◽  
J. Noordmans ◽  
H. J. Busscher

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