NDLI: A Machine Vision System for Continuous Field Measurement of Grape Fruit Diameter

Content Provider	IEEE Xplore Digital Library
Author	Qingbing Zeng Chengliang Liu Yubin Miao Shengwei Fei Shiping Wang
Copyright Year	2008
Description	Author affiliation: Sch. of Mech. Eng., Shanghai Jiao tong Univ., Shanghai (Qingbing Zeng; Chengliang Liu; Yubin Miao; Shengwei Fei) \|\| Coll. Sch. of Agric. & Biol., Shanghai Jiao tong Univ., Shanghai (Shiping Wang)
Abstract	It is necessary to measure dynamics of the fruit diameter to understand how plants respond to diurnal variation in water content and long-term growth conditions. Current techniques for measuring the fruit diameter are mostly touching measurements. The contact of the sensor places a stress on the grape fruit and may introduce erroneous results because of the touching of the grape fruit. We have presented a non-contact optical method for the accurate measurement of the fruit diameter in the grape field. The vision measuring system consists of a CMOS camera equipped with a telecentric lens, red back lighting board and PC. This system eliminates the fruit contact required by using the displacement transducers. Extensive experiments showed that the vision system is accurate and robust. This developed system achieves a repeatable accuracy of plusmn7 um for measuring the fruit diameter and provides an effective tool to better detect physiological disorders in plant.
Starting Page	1064
Ending Page	1068
File Size	1346115
Page Count	5
File Format	PDF
ISBN	9780769534978
DOI	10.1109/IITA.2008.274
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pipelines CMOS image sensors grape image analysis Stress Machine vision Current measurement Tactile sensors Displacement measurement Cameras fruit diameter Optical sensors Lenses
Content Type	Text
Resource Type	Article

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