An Imaging System for Honeybee Motion Tracking in the Beehive
Date Issued
2014
Date
2014
Author(s)
Chen, Ta-Yu
Abstract
Honeybees play an important role in pollinating flowering plants. Many economic plants are pollinated by honeybees. However, human being has very little knowledge about honeybee behavior in the beehive especially. The objective of this research is to develop an imaging system for tracking honeybee trajectory and to build up activity indices for evaluating honeybee’s daily activity in the beehive. In order to observe honeybee, a side wall of the beehive was hollowed and inserted a transparent glass which prevented the imaging system influenced from the influence of honeybees. The hardware of imaging system was mainly constructed by a waterproof observation box which consisted of two CCD cameras and one rectangular infrared light panel. The infrared light panel provided stable illuminations to acquire high resolution images. The software of imaging system consists of honeybee trajectory tracking and behavior analyses. Round labels were stuck on honeybees. The individual honeybee was detected by the circular label via Hough circle transform method and recognized via support vector machine (SVM). Through the position and identity of the bee and the minimum distance, the trajectory was tracked with 94% trajectory recognition rate. Through the trajectory analysis, we constructed the activity indices including how many times effective trajectory appear per hour, honeybee moving distance per hour, the ratio between thread-like and blob-like trajectory per hour, and the times position overlap. In order to monitor honeybee motion in the beehive closely and investigate the effect of imidacloprid on honeybee, we executed three types of experiment including indoor experiment, indoor insecticide experiment, and outdoor insecticide experiment. From the indoor experiment results, it is clear that the honeybee activity level is more active at daytime. From results of the indoor insecticide and outdoor insecticide experiments, it can be concluded that the interactions of control honeybees are much more than those for insecticide fed honeybees and their activity level is also more active.
Subjects
蜜蜂
運動行為指標
行為監測
影像處理
支持向量機
Type
thesis
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