12 May 1993 Machine vision seedling measurement using multiple cameras
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Proceedings Volume 1836, Optics in Agriculture and Forestry; (1993); doi: 10.1117/12.144026
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States
Abstract
Tomato seedling images were acquired in a two-camera image acquisition system for the seedling quality inspection. It uses two back-lit light sources, orthogonally mounted, to create seedling silhouettes for the top view and the side view image acquisitions. The images were acquired with either only back illumination or both back and side illuminations. Two adaptive thresholding techniques were selected and evaluated for segmentation accuracy. Both methods, one is based on histogram analysis and the second technique is based on the analysis of intensity and gray level gradient of local pixels, had similar performance for given lighting conditions. It is found, however, that the lighting strategy affected the image formation process. In addition, it affected the accuracy of segmentation process which separates seedling from its background.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vladimir N. Ruzhitsky, Peter P. Ling, "Machine vision seedling measurement using multiple cameras", Proc. SPIE 1836, Optics in Agriculture and Forestry, (12 May 1993); doi: 10.1117/12.144026; https://doi.org/10.1117/12.144026
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KEYWORDS
Light sources and illumination

Image segmentation

Image acquisition

Machine vision

Light sources

Image processing

Cameras

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