Vision methods for inspection of greenhouse poinsettia plants

George E. Meyer; W. W. Troyer; Jay B. Fitzgerald

doi:10.1117/12.25079

1 February 1991 Vision methods for inspection of greenhouse poinsettia plants

George E. Meyer, W. W. Troyer, Jay B. Fitzgerald

Proceedings Volume 1379, Optics in Agriculture; (1991) https://doi.org/10.1117/12.25079
Event: Advances in Intelligent Robotics Systems, 1990, Boston, MA, United States

Abstract

Various vision methods for inspecting the growth and quality of poinsettia plants are discussed in this paper . The visible and near-infrared vision approaches are based on previous spectral reflectance measurements . Low (0 ppm) nitrogen plants grown in a greenhouse showed an increase in red (0. 7 - 0. 75 rim) and a decrease in near-infrared ( 0 . 8 - 1 . 1 im) reflectance over high ( 256 ppm) nitrogen levels . Growth chamber plants showed similar reflectance in the red but different NIR reflectance than with greenhouse plants . NIR reflectance was affected by vegetative density and not by leaf nitrogen content. Thermal imaging techniques (12 - 14 im) improve canopy temperature measurements . The usefulness of image methods depends on reflectivity analog-digital sensitivity and background lighting quality. An electronic plant doctor based on a database of images would be a useful tool for the grower to perform visual diagnostics. 1.

Citation Download Citation

George E. Meyer, W. W. Troyer, and Jay B. Fitzgerald "Vision methods for inspection of greenhouse poinsettia plants", Proc. SPIE 1379, Optics in Agriculture, (1 February 1991); https://doi.org/10.1117/12.25079

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available