Media type: E-Article Title: Automatic thresholding for hemispherical canopy-photographs based on edge detection Contributor: Nobis, Michael; Hunziker, Urs imprint: Elsevier BV, 2005 Published in: Agricultural and Forest Meteorology Language: English DOI: 10.1016/j.agrformet.2004.10.002 ISSN: 0168-1923 Origination: Footnote: