Retrieving the Velocity of Motion of Air Masses from Digital Images of Clouds

Details Retrieving the Velocity of Motion of Air Masses from Digital Images of Clouds Retrieving the Velocity of Motion of Air Masses from Digital Images of Clouds

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..899..722b&link_type=abstract

SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP Conference Proceedings, Volume 899, pp. 722-722 (2007).

Statistics

Computation

Cloud Physics And Chemistry, Computational Methods And Data Processing, Data Acquisition And Storage, Image Processing

Scientific paper

An interdisciplinary project, aimed at developing tools for the determination of physical characteristics of the atmosphere by means of ground-based digital imaging in the visible range is in progress. Determining the 3-dimensional field of velocities of motion of the air masses from digital images of clouds is among the central tasks. The approach consists in identifying patterns of the cloud structure with characteristic shape and measuring their angular displacement by tracking them in series of consecutive digital images, taken at optimal time intervals. The geometrical mapping of the cloud of an image onto the following image (including translation, rotation, dilatation and additional small irregular deformations) is parameterized, and the numerical values of the parameters are computed by minimizing the sum over pixels of the squared deviation of the brightness, weighed with factors accounting for the representativeness of the group of pixels, and with constrains on the parameters describing irregular deformations.

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