File:Hemispherical photography canopy manual rich 1989.pdf

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Hemispherical_photography_canopy_manual_rich_1989.pdf‎ (1,275 × 1,650 pixels, file size: 1.23 MB, MIME type: application/pdf)

Description

Hemispherical photography canopy manual (public domain)

Rich, P.M. 1989. A manual for analysis of hemispherical canopy photography. Los Alamos National Laboratory Report LA–11733–M.

Hemispherical canopy photography involves taking photographs through a hemispherical (fisheye) lens pointed upward from beneath a plant canopy. The resulting photographs can be analyzed to determine the geometry of canopy openings and to calculate potential light penetration. This manual serves as a comprehensive guide to the program CANOPY©, a public domain microcomputer program for image analysis of hemispherical canopy photography. Included are discussions of theory, research applications, field methodology, hardware setup and operation, and software setup and operation. CANOPY enables video digitization of negatives, real-time display of positive images, interactive determination of a threshold to distinguish foliage from canopy openings, editing of photographs with poor exposure, rapid calculation of various measures of canopy geometry and indices of potential light penetration, and convenient output of results. A series of utility programs allow user specification of theoretical or empirical distributions of direct sunlight and diffuse skylight for a given site.
Date

1989(1989)
Source

Los Alamos National Laboratory Report LA–11733–M
Author

Paul M. Rich
Permission
(Reusing this image)
Public domain This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made during the course of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.

Please note that national laboratories operate under varying licences and some are not free. Check the site policies of any national lab before crediting it with this tag.
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current21:51, 23 October 2008Thumbnail for version as of 21:51, 23 October 20081,275×1,650, 92 pages (1.23 MB)Pmrich (Talk | contribs) ({{Information |Description=Hemispherical photography canopy manual (public domain) Rich, P.M. 1989. A manual for analysis of hemispherical canopy photography. Los Alamos National Laboratory Report LA–11733–M. Hemispherical canopy photography involve)

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