S-RPN: Sampling-balanced region proposal network for small crop pest detection

abstract

         Effective pest control is a key factor in the field of agricultural food safety . therefore , Automatic monitoring and accurate identification of crop pests have high practical value in the process of agricultural planting . these years , With the development of methods based on deep learning , The identification and detection results of pests have improved rapidly . Although these methods are promising , However, the efficiency and accuracy in detecting very small-scale crop pests are still limited , Thus reducing their effectiveness . The main reason is , Current methods based on deep learning may not be able to extract enough detailed appearance features for small pest objects in the image , This makes it difficult to train the classifier to detect and distinguish small pests in the background or similar objects . In order to solve the problem of identification and detection of small pests , In this paper , We seek to rebuild the current regional advice network , And perform more details on different scales , To facilitate the detection of small pests . Inspired by the visual attention system , We first introduce the attention mechanism into the remaining Networks , To get a richer pest characteristic appearance , In particular, the detailed characteristics of small object pests ; then , In order to make the regional recommendation network (RPN) Get higher quality goal suggestions , Easy to detect , A sampling balanced regional proposal generation network is proposed , To improve the accuracy of pest detection . Besides , We design a new adaptive region of interest (RoI) Choose a method to learn features from different levels of the feature pyramid . In what is proposed AgriPest21 Many experiments have been carried out on the data set , Our approach can achieve 89.0% The average recall rate ,mAP achieve 78.7%, Superior to other state-of-the-art methods , Include SSD, RetinaNet, Free-Anchor, PISA, Grid RCNN, and Cascade RCNN

1. Introduction

         Agricultural development is limited by various factors , Especially crop pests , It has a negative impact on agricultural production . crop