Development of a novel system for accurate and continuous measurement of fruit diameter in agriculture and its applications to grapes

Qingbing Zeng; Chengliang Liu; Yu-bin Miao; Shiping Wang

doi:10.1117/1.3256159

1 October 2009 Development of a novel system for accurate and continuous measurement of fruit diameter in agriculture and its applications to grapes

Qingbing Zeng, Chengliang Liu, Yu-bin Miao, Shiping Wang

Author Affiliations +

Journal of Electronic Imaging, Vol. 18, Issue 4, 043005 (October 2009). https://doi.org/10.1117/1.3256159

Abstract

The measurement of rapid and microsize changes in fruit diameter can be used to understand how plants respond to diurnal variation in water content and long-term growth conditions. The most current techniques involve physical measurements. The contact of the physical sensor places a stress on fruit and affects normal fruit growth. To solve this problem, we present a noncontact optical method for measuring fruit diameter in crop fields accurately. A rough-to-fine strategy is considered, where a binary image is first obtained and used to find candidate fruit body edge points; then a Zernike moment operator is used to determine edges of the fruit body with subpixel accuracy. Finally, the fruit diameter is computed from the edge pixels of the fruit body. Measuring experiments performed during the bloom stage of grapes show high sensitivity of the proposed method. This allows for clear detection of diurnal patterns of grape diameter changes and precise monitoring of very slight variations in fruit growth rates. Experiments show that the developed system is robust, accurate, and effective. The proposed technique has proven to be an effective tool to better detect physiological disorders in plants.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Qingbing Zeng, Chengliang Liu, Yu-bin Miao, and Shiping Wang "Development of a novel system for accurate and continuous measurement of fruit diameter in agriculture and its applications to grapes," Journal of Electronic Imaging 18(4), 043005 (1 October 2009). https://doi.org/10.1117/1.3256159

Published: 1 October 2009

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