[目的/意义]针对小麦叶片病虫害在自然环境下形态和颜色特征较为复杂、区分度较低等特点,提出一种高质量高效的病虫害检测模型,即YOLOv8-SS (You Only Look Once Version 8-SS),为病虫害的预防与科学化治理提供准确的依据。[方法]基于YO...[目的/意义]针对小麦叶片病虫害在自然环境下形态和颜色特征较为复杂、区分度较低等特点,提出一种高质量高效的病虫害检测模型,即YOLOv8-SS (You Only Look Once Version 8-SS),为病虫害的预防与科学化治理提供准确的依据。[方法]基于YOLOv8算法,采用改进的轻量级卷积神经网络ShuffleNet V2作为主干网络提取图像特征即YOLOv8-S,在保持检测精度的同时,减少模型的参数数量和计算负载;在此基础上增加小目标检测层和注意力机制SEnet (Squeeze and Excitation Network),对YOLOv8-S进行改进,在不降低检测速度和不损失模型轻量化程度的情况下提高检测精度,提出YOLOv8-SS小麦叶片病虫害检测模型。[结果与讨论]YOLOv8-SS模型在实验数据集上的平均识别精度和检测准确率分别达89.41%和91.00%,对比原模型分别提高10.11%和7.42%。因此,本研究所提出的方法可显著提高农作物病虫害的检测鲁棒性,并增强模型对小目标图像特征的提取能力,从而高效准确地进行病虫害的检测和识别。[结论]本研究使用的方法具有广泛适用性,可应用于大规模农作物病虫害检测的实际场景中。展开更多
Instance segmentation plays an important role in image processing.The Deep Snake algorithm based on contour iteration deforms an initial bounding box to an instance contour end-to-end,which can improve the performance...Instance segmentation plays an important role in image processing.The Deep Snake algorithm based on contour iteration deforms an initial bounding box to an instance contour end-to-end,which can improve the performance of instance segmentation,but has defects such as slow segmentation speed and sub-optimal initial contour.To solve these problems,a real-time instance segmentation algorithm based on contour learning was proposed.Firstly,ShuffleNet V2 was used as backbone network,and the receptive field of the model was expanded by using a 5×5 convolution kernel.Secondly,a lightweight up-sampling module,multi-stage aggregation(MSA),performs residual fusion of multi-layer features,which not only improves segmentation speed,but also extracts effective features more comprehensively.Thirdly,a contour initialization method for network learning was designed,and a global contour feature aggregation mechanism was used to return a coarse contour,which solves the problem of excessive error between manually initialized contour and real contour.Finally,the Snake deformation module was used to iteratively optimize the coarse contour to obtain the final instance contour.The experimental results showed that the proposed method improved the instance segmentation accuracy on semantic boundaries dataset(SBD),Cityscapes and Kins datasets,and the average precision reached 55.8 on the SBD;Compared with Deep Snake,the model parameters were reduced by 87.2%,calculation amount was reduced by 78.3%,and segmentation speed reached 39.8 frame·s−1 when instance segmentation was performed on an image with a size of 512×512 pixels on a 2080Ti GPU.The proposed method can reduce resource consumption,realize instance segmentation tasks quickly and accurately,and therefore is more suitable for embedded platforms with limited resources.展开更多
文摘[目的/意义]针对小麦叶片病虫害在自然环境下形态和颜色特征较为复杂、区分度较低等特点,提出一种高质量高效的病虫害检测模型,即YOLOv8-SS (You Only Look Once Version 8-SS),为病虫害的预防与科学化治理提供准确的依据。[方法]基于YOLOv8算法,采用改进的轻量级卷积神经网络ShuffleNet V2作为主干网络提取图像特征即YOLOv8-S,在保持检测精度的同时,减少模型的参数数量和计算负载;在此基础上增加小目标检测层和注意力机制SEnet (Squeeze and Excitation Network),对YOLOv8-S进行改进,在不降低检测速度和不损失模型轻量化程度的情况下提高检测精度,提出YOLOv8-SS小麦叶片病虫害检测模型。[结果与讨论]YOLOv8-SS模型在实验数据集上的平均识别精度和检测准确率分别达89.41%和91.00%,对比原模型分别提高10.11%和7.42%。因此,本研究所提出的方法可显著提高农作物病虫害的检测鲁棒性,并增强模型对小目标图像特征的提取能力,从而高效准确地进行病虫害的检测和识别。[结论]本研究使用的方法具有广泛适用性,可应用于大规模农作物病虫害检测的实际场景中。
基金supported by National Key Research and Development Program(No.2022YFE0112400)National Natural Science Foundation of China(No.21706096)Natural Science Foundation of Jiangsu Province(No.BK20160162).
文摘Instance segmentation plays an important role in image processing.The Deep Snake algorithm based on contour iteration deforms an initial bounding box to an instance contour end-to-end,which can improve the performance of instance segmentation,but has defects such as slow segmentation speed and sub-optimal initial contour.To solve these problems,a real-time instance segmentation algorithm based on contour learning was proposed.Firstly,ShuffleNet V2 was used as backbone network,and the receptive field of the model was expanded by using a 5×5 convolution kernel.Secondly,a lightweight up-sampling module,multi-stage aggregation(MSA),performs residual fusion of multi-layer features,which not only improves segmentation speed,but also extracts effective features more comprehensively.Thirdly,a contour initialization method for network learning was designed,and a global contour feature aggregation mechanism was used to return a coarse contour,which solves the problem of excessive error between manually initialized contour and real contour.Finally,the Snake deformation module was used to iteratively optimize the coarse contour to obtain the final instance contour.The experimental results showed that the proposed method improved the instance segmentation accuracy on semantic boundaries dataset(SBD),Cityscapes and Kins datasets,and the average precision reached 55.8 on the SBD;Compared with Deep Snake,the model parameters were reduced by 87.2%,calculation amount was reduced by 78.3%,and segmentation speed reached 39.8 frame·s−1 when instance segmentation was performed on an image with a size of 512×512 pixels on a 2080Ti GPU.The proposed method can reduce resource consumption,realize instance segmentation tasks quickly and accurately,and therefore is more suitable for embedded platforms with limited resources.
