id: 01920400
dt: j
an: 01920400
au: Allmen, Mark C.; Kegelmeyer, W. Philip, Jr.
ti: The computation of cloud base height from paired whole-sky imaging cameras.
so: Mach. Vis. Appl. 9, No. 4, 160-165 (1997).
py: 1997
pu: Springer-Verlag, New York
la: EN
cc: I.4.8 I.4.9
ut: image processing; stereo; optical flow; cloud base height; whole-sky
    imaging camera
ci: 
li: doi:10.1007/s001380050037
ab: Summary: We have developed a new approach to the extraction of cloud base
    height (CBH) from pairs of whole-sky imagers (WSIs). The core problem
    is to spatially register cloud fields from widely separated WSIs. This
    complete triangulation provides the CBH measurements. The wide camera
    separation and the self-similarity of clouds defeats standard matching
    algorithms when applied to static views of the sky. In response, we use
    optical flow methods that exploit the fact that modern WSIs provide
    image sequences. We describe the algorithm, a confidence metric for its
    performance, a method to correct the severe projective effects of the
    WSI camera, and results on real data. (Provider: Leibiger)
rv: