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Proceedings Paper

Use of color, color infrared, black and white films, and video systems in detecting health, stress, and disease in vegetation
Author(s): Carlos H. Blazquez
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Paper Abstract

Ground and aerial experiments were conducted with color (NC) color infrared (CIR) and black and white film and video systems to compare the limitations! advantages of each method of image acquisition with photographs of natural vegetation including cypress stands wetlands and cultivated crops such as: tomatoes cucumbers and citrus. Image analysis with a Linear Measuring System (LMS) and a scanning densitometer were used to quantify healthy stressed and diseased foliage!canopy of each crop for comparisons with visual estimates. videography and photography were useful in delineating topographic features and location of vegetation. The NC video systems yielded images that distinctly separated healthy and dying foliage but did not compare with the CIR video or photography in outlining distinct areas of stress and disease. Aerial photography provided a synoptic view of the fields and cypress stands not otherwise possible. CIR images were easier to process with the LMS than NC video or photographic frames. CIR video and photographic systems produced clearer differences between healthy and stressed foliage. Spectral curves produced with the scanning densitometer correlated well with visual grading of health and stress. . 2.

Paper Details

Date Published: 1 February 1991
PDF: 10 pages
Proc. SPIE 1379, Optics in Agriculture, (1 February 1991); doi: 10.1117/12.25080
Show Author Affiliations
Carlos H. Blazquez, Citrus Research and Education Ctr./Univ. of Florida (United States)


Published in SPIE Proceedings Vol. 1379:
Optics in Agriculture
James A. DeShazer; George E. Meyer, Editor(s)

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