Aiming at the basic problems that plague crop growth in traditional agriculture, a method of identifying weeds using machine vision and applying chemical agents with selective variables was proposed. Collected visible light images of plant diseases, pre-processed the images, segmented the images using an instruction value composed of R, G, and B color components as a threshold, and wrote an algorithm to misjudge the background image after segmentation as a background. Pixels were used for information recovery; according to the analysis of the change in color characteristics after the occurrence of lesions, sample lesions were extracted using the two color features of G / R and G / B; the results of the damage degree of diseased leaves measured using image processing technology The analysis was performed and compared with the results of the plant disease degree determined by the paper card method in the traditional classification standard. The experiments show that the selected 7 characteristic parameters are used as the input of the neural network, and the number of types of cucumber leaf diseases that need to be identified is used as the output to build a BP neural network model. By adjusting various parameters in the BP neural network, the parameters with the best recognition effect are selected to train the network. The trained network is used to identify the plant disease image. As a result, the disease can be identified well, and the recognition rate is 93.5%.

Xiuying Li. Plant Disease Detection Method Based on Computer Vision Technology.International Journal of Multimedia Computing (2020), Vol. 1, Issue 1: 63-73. https://doi.org/10.38007/IJMC.2020.010105.

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