Journal
IEEE ACCESS
Volume 9, Issue -, Pages 124491-124504Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3110978
Keywords
Diseases; Task analysis; Image segmentation; Deep learning; Crops; Feature extraction; Three-dimensional displays; Deep learning; strawberries fruit recognition; segmentation; classification; disease phenotyping; smart farming; precision agriculture
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The study introduces a deep learning framework for identifying different categories of strawberry fruits, and presents a dataset for evaluating the network performance. By combining modules that adaptively control network receptive field size, manage salient feature flow, and control architectural complexity, the proposed method outperforms previous approaches in strawberry fruit phenotyping. It also shows remarkable performance in accurately recognizing diseased fruits.
Timely harvesting and disease identification of strawberry fruits is a major concern for commercial level cultivators. Failing to harvest the grown strawberries can result in the fruit rotting which makes their damaged tissues more prone to grey mold pathogens. Immediate removal of the overgrown or diseased strawberries is inevitable to curb the mass spreading of the pathogen. In this paper, we propose a deep learning-based framework to identify three different strawberry fruit classes (unripe, partially ripe and ripe), as well as a class of overgrown or diseased strawberries. We equip the proposed convolutional encoder-decoder network with three different modules. One for adaptively controlling receptive filed size of the network to detect objects of multiple sizes. Second for controlling the flow of salient features (information) to the deeper layers of the network and the other for controlling the architecture's computational complexity. These modules combined, outperform the previous state-of-the-art semantic segmentation networks on the task of strawberry fruit phenotyping. We also introduce a dataset collected from different farms to evaluate the performance of the network. Quantitative and qualitative results show that notwithstanding heterogeneity in the data and the effect of the real-field variations, our approach produced remarkable results with a 3% increase in mean intersection over union as compared to the other state-of-the-art networks and was able to recognize diseased fruits with a precision of 92.45%.
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