Chuanheng Sun

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The paper proposes a deterministic node deployment method based on grid scan to achieve targets coverage and nodes connectivity. Target area is divided into girds from which the most suitable one is selected to place the next node. In the coverage phase, the grid where the sensor node can sense the most targets and have the best coverage level is selected(More)
Due to the low and uneven illumination that is typical of a recirculating aquaculture system (RAS), visible and near infrared (NIR) images collected from RASs always have low brightness and contrast. To resolve this issue, this paper proposes an image enhancement method based on the Multi-Scale Retinex (MSR) algorithm and a greyscale nonlinear(More)
The agricultural products' production link, the production antecedents data is the foundation of the traceability system. In the process of agricultural products' production antecedents acquisition, according to the fact that the single acquisition method, the low collection efficiency, and the antecedents data was easy to tamper. This paper designs an(More)
The integrated management of cucumber (Cucumis sativus L.) diseases play a key role in guaranteeing the high quality and security of cucumber production in greenhouse, moreover, the early warning of cucumber diseases is the chief precondition for IPM (Integrated Pest Management). This paper describes an attempt to develop an early warning system for(More)
The agricultural production video record is an important primitive data in the establishment of agricultural product quality traceability system and digital monitoring system. This paper presents the feature extraction and automatic recognition system of the typical production activities in the agricultural production video record based on the machine(More)
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