John M. Weiss

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Ridge detection in digital imagery, unlike edge detection, is an area that has received relatively little attention. Ridges are long, narrow structures that are perceptibly brighter than the background. Examples of ridges include roads in aerial images and vessels in medical images. The ability to rapidly and accurately label ridge pixels in a digital image(More)
Automatic contrail detection is of major importance in the study of the atmospheric effects of aviation. Due to the large volume of satellite imagery, selecting contrail images for study by hand is impractical and highly subject to human error. It is far better to have a system in place that will automatically evaluate an image to determine 1) whether it(More)
We present results of a detailed analysis of inclusive direct photon production at the $(3095). The direct photon momentum distribution for x > 0.4 is presented and compared with the leading-order QCD pre-diction. The total production rate is found to be consistent with theoretical expectations, but the observed momentum distribution is considerably softer.(More)
A co-curricular multidisciplinary teaming and design center was started in 1997 to augment classical classroom engineering education with active and collaborative project-centered experiential learning. Design, creativity, inventiveness, hands-on learning, project management, teaming, and leadership become the value-added education in the center which now(More)
Preliminary results on two-photon interactions from the SLAC-LBL Mark II magnetic detector at SPEAR are presented. The cross section for n' production by the reaction e+e-f e+e-n' has been measured over the beam energy range from 2 to 4 GeV. The radiative width PYY(n') has been determined to be 5.8 + 1.1 keV (220% systematic uncertainty). Upper limits on(More)
Abrams, M. S. Alam, C. A. Blocker, A. M. Boyarski, M. Breidenbach, Burke, W. C. Carithers, W. Chinowsky, M. W. Coles, S. Cooper, Dieterle, J. B. Dillon, J. Dorenbosch, J. M. Dorfan, M. W. Eaton, Feldman, M. E. B. Franklin, G. Gidal, G. Goldhaber, G. Hanson, Hayes, T. Himel, D. G. Hitlin', R. J. Hollebeek, W. R. Innes, Jaros, P. Jenni, A. D. Johnson, J. A.(More)
G. S. Abrams, M. S. Alam, C. A. Blocker, A. M. Boyarski, M. Breidenbach, C. H. Broll, D. L. Burke, W. C. Carithers, W. Chinowsky, M. W. Coles, S. Cooper, B. Couchman, W. E. Dieterle, J. B. Dillon, J. Dorenbosch, J. M. Dorfan, M. W. Eaton, G. J. Feldman, H, C. Fischer, M.E.B. Franklin, G. Gidal, G. Goldhaber, G. Hanson, K. G. Hayes, T. Himel, D. G. Hitlin,(More)