Abstract

The growth of strawberry will be stressed by biological or abiotic factors, which will cause a great threat to the yield and quality of strawberry, in which various strawberry diseased. However, the traditional identification methods have high misjudgment rate and poor real-time performance. In today's era of increasing demand for strawberry yield and quality, it is obvious that the traditional strawberry disease identification methods mainly rely on personal experience and naked eye observation and cannot meet the needs of people for strawberry disease identification and control. Therefore, it is necessary to find a more effective method to identify strawberry diseases efficiently and provide corresponding disease description and control methods. In this paper, based on the deep convolution neural network technology, the recognition of strawberry common diseases was studied, as well as a new method based on deep convolution neural network (DCNN) strawberry disease recognition algorithm, through the normal training of strawberry image feature representation in different scenes, and then through the application of transfer learning method, the strawberry disease image features are added to the training set, and finally the features are classified and recognized to achieve the goal of disease recognition. Moreover, attention mechanism and central damage function are introduced into the classical convolutional neural network to solve the problem that the information loss of key feature areas in the existing classification methods of convolutional neural network affects the classification effect, and further improves the accuracy of convolutional neural network in image classification.

Highlights

  • Strawberry is a popular fruit nicknamed the “Queen of Fruits.” It is favoured by most people because of its rich nutritional value, sweet taste, sufficient moisture, and affordable prices

  • 4.1. e Influence of Network Depth and Convolution Kernel Size on Model Recognition Rate. e convolutional layer of the convolutional neural network model in the experiment adopts padding, so that the length and width of the image will not change when the image passes through the convolutional layer, but the depth is deepened; the sampling layer construction

  • Recognition and Analysis of Strawberry Disease Leaves Based on Image Set. e folding cross-validation strategy is used in the experiment and compared with the method based on colour feature (CT), the method based on colour, texture, and shape features (CTSF), the method based on feature fusion and local discriminant projection (FFLDP), and the method based on deep convolution neural network (DCNN). e first three methods firstly preprocess and segment the diseased leaf image and extract the classification features from the diseased leaf image

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Summary

Introduction

Strawberry is a popular fruit nicknamed the “Queen of Fruits.” It is favoured by most people because of its rich nutritional value, sweet taste, sufficient moisture, and affordable prices. Most of the existing image classification algorithms based on convolutional neural networks have a large loss of information in the process of image feature extraction. The convolutional neural network technology has made great progress in the field of image classification and target recognition, making it widely used in the recognition of plant diseases. E above-mentioned plant disease recognition methods based on convolutional neural networks have the advantages of not needing to segment images, more recognition types, and strong generalization ability. Erefore, further improve the classification ability of the image classification algorithm based on convolutional neural network, and apply it to the identification of strawberry diseases and insect pests, realize automatic, accurate, fast, and instant recognition of strawberry diseases and insect pests, and help fruit farmers understand and study the occurrence rules of strawberry diseases and insect pests. Strawberry diseases and insect pest’s prevention and control measures play a key role in reducing economic losses caused by diseases and insect pests, making strawberries high and productive, and promoting the accelerated development of strawberry planting. e recognition algorithm can make the positioning network detect most diseased areas under the guidance of the feedback network, and the classification network can identify and classify the diseased areas according to the suggested ones. is model is combined with the pretrained image fine-tuning classification model of common strawberry diseases and the fine-grained classification model of strawberry common diseases image based on attention mechanism. e algorithm has the characteristics of high recognition rate, fast recognition speed, etc., and can overcome the interference of the external environment to the greatest extent and achieve rapid and accurate identification of target diseases

Structure Design of Deep Convolutional Neural Network
Identification Process of Strawberry Diseases
Results and Analysis
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Conclusion
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