Open Access

ARTICLE

Locating Famous Tea’s Picking Point Based on Shi-Tomasi Algorithm

by Lei Zhang^1,2, Lang Zou^1,2, Chuanyu Wu^1,2,*, Jianneng Chen^1,2, Heping Chen³

1 Faculty of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, 310018, China
2 Key Laboratory of Transplanting Equipment and Technology of Zhejiang Province, Hangzhou, 310018, China
3 Ingram School of Engineering, Texas State University, San Marcos, Texas, USA

* Corresponding Author: Chuanyu Wu. Email:

Computers, Materials & Continua 2021, 69(1), 1109-1122. https://doi.org/10.32604/cmc.2021.016495

Received 03 January 2021; Accepted 24 March 2021; Issue published 04 June 2021

Abstract

To address the difficulty of locating the picking point of a tea sprout during the intelligent automatic picking of famous tea, this study proposes a method to obtain information on the picking point on the basis of the Shi-Tomasi algorithm. This method can rapidly identify a tea sprout’s picking point and obtain its coordinates. Images of tea sprouts in a tea garden were collected, and the G-B component of tea sprouts was segmented using the Otsu algorithm. The region of interest was set with the lowest point of its contour as the center. The characteristics of tea buds and branches in the area were extracted, and the Otsu algorithm was used for a second segmentation of tea sprout images. The tea buds were segmented using the improved Zhang algorithm. The branch feature binary image was used to refine the skeleton, and the Shi-Tomasi algorithm was used to detect the corners of the skeleton and calculate and mark the picking points of the shoots. Sixty sets of samples were tested. The test identified 1,042 effective shoots for tender buds, and 887 picking points were marked, with a success rate of 85.12%, thereby verifying the effectiveness of the method and providing a theoretical reference for the visual positioning of the automatic picking of famous tea.

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Keywords

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