Mr. XinZhong Wang Profile

XinZhong Wang

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Proceedings Article | 7 December 2006 Paper

An automatic segmentation method for multi-tomatoes image under complicated natural background

Jianjun Yin, Hanping Mao, Yongguang Hu, Xinzhong Wang, Shuren Chen

Proceedings Volume 6411, 641118 (2006) https://doi.org/10.1117/12.697799

KEYWORDS: Image segmentation, Image processing, RGB color model, Chromatic aberrations, Roentgenium, Binary data, Image analysis, Agriculture, Image visualization, Feature extraction

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It is a fundamental work to realize intelligent fruit-picking that mature fruits are distinguished from complicated backgrounds and determined their three-dimensional location. Various methods for fruit identification can be found from the literatures. However, surprisingly little attention has been paid to image segmentation of multi-fruits which growth states are separated, connected, overlapped and partially covered by branches and leaves of plant under the natural illumination condition. In this paper we present an automatic segmentation method that comprises of three main steps. Firstly, Red and Green component image are extracted from RGB color image, and Green component subtracted from Red component gives RG of chromatic aberration gray-level image. Gray-level value between objects and background has obviously difference in RG image. By the feature, Ostu's threshold method is applied to do adaptive RG image segmentation. And then, marker-controlled watershed segmentation based on morphological grayscale reconstruction is applied into Red component image to search boundary of connected or overlapped tomatoes. Finally, intersection operation is done by operation results of above two steps to get binary image of final segmentation. The tests show that the automatic segmentation method has satisfactory effect upon multi-tomatoes image of various growth states under the natural illumination condition. Meanwhile, it has very robust for different maturity of multi-tomatoes image.

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