Estimation of the Number of Strawberries for a Movable Bench System

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  • イチゴの循環式移動栽培における果実計数手法の開発
  • イチゴ ノ ジュンカンシキ イドウ サイバイ ニ オケル カジツ ケイスウ シュホウ ノ カイハツ

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Abstract

A circulating movable bench system for strawberries, in which plants on the benches are moved in both lateral and longitudinal directions, was developed, aiming to increase area productivity and reduce the heating and lighting cost per plant. In the system, all benches pass through a fixed point at a lateral conveyer unit every day to be watered. Therefore, it is believed that the growth information of all plants can be obtained at a high frequency by installing sensors at this fixed point. In this study, a method for counting the number of red fruits and immature green fruits in the movable bench system was proposed. In the measurement system, color images and depth information are obtained from below the strawberry plants. A time-of-flight (TOF) sensor was applied to the system to segment overlapping fruits using the depth information to manage the occlusion of the fruits. As a result, the counting success rate for the red fruit reached 96.8 % with “Amaotome” and 94.7 % with “Benihoppe”. Without the depth information, however, this rate reached 90.3 % and 74.3 %, respectively. The counting success rate for the immature fruit was 69.6 % and 71.2 %, respectively.

Journal

  • Shokubutsu Kankyo Kogaku

    Shokubutsu Kankyo Kogaku 27 (3), 152-161, 2015

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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