从全球导航卫星系统反射信号(Global Navigation Satellite System Reflectometry,GNSS-R)测高应用中对镜面反射点的高精度需求出发,利用GNSS-R空间几何位置关系和机器学习中的RMSprop(Root Mean Square Prop)算法对镜面反射点问题进行...从全球导航卫星系统反射信号(Global Navigation Satellite System Reflectometry,GNSS-R)测高应用中对镜面反射点的高精度需求出发,利用GNSS-R空间几何位置关系和机器学习中的RMSprop(Root Mean Square Prop)算法对镜面反射点问题进行研究,提出了一种基于RMSprop的高精度镜面反射点预测算法,该算法能够实现对学习率的自适应调整,加速梯度下降,提高算法的收敛性能。仿真结果表明,该算法收敛快,精度高。展开更多
Human Action Recognition(HAR)and pose estimation from videos have gained significant attention among research communities due to its applica-tion in several areas namely intelligent surveillance,human robot interaction...Human Action Recognition(HAR)and pose estimation from videos have gained significant attention among research communities due to its applica-tion in several areas namely intelligent surveillance,human robot interaction,robot vision,etc.Though considerable improvements have been made in recent days,design of an effective and accurate action recognition model is yet a difficult process owing to the existence of different obstacles such as variations in camera angle,occlusion,background,movement speed,and so on.From the literature,it is observed that hard to deal with the temporal dimension in the action recognition process.Convolutional neural network(CNN)models could be used widely to solve this.With this motivation,this study designs a novel key point extraction with deep convolutional neural networks based pose estimation(KPE-DCNN)model for activity recognition.The KPE-DCNN technique initially converts the input video into a sequence of frames followed by a three stage process namely key point extraction,hyperparameter tuning,and pose estimation.In the keypoint extraction process an OpenPose model is designed to compute the accurate key-points in the human pose.Then,an optimal DCNN model is developed to classify the human activities label based on the extracted key points.For improving the training process of the DCNN technique,RMSProp optimizer is used to optimally adjust the hyperparameters such as learning rate,batch size,and epoch count.The experimental results tested using benchmark dataset like UCF sports dataset showed that KPE-DCNN technique is able to achieve good results compared with benchmark algorithms like CNN,DBN,SVM,STAL,T-CNN and so on.展开更多
为了提高电动汽车电池模组焊点缺陷检测中的图像配准精度,提出一种改进的图像配准优化方法。首先,对图片进行预处理后,使用改进的Qtree_ORB算法得到图像均匀分布的特征点,通过描述符融合对特征点进行描述;其次,经过汉明距离匹配后,通过...为了提高电动汽车电池模组焊点缺陷检测中的图像配准精度,提出一种改进的图像配准优化方法。首先,对图片进行预处理后,使用改进的Qtree_ORB算法得到图像均匀分布的特征点,通过描述符融合对特征点进行描述;其次,经过汉明距离匹配后,通过空间余弦值进行预筛选并使用渐进抽样一致性算法(PROSAC)得到强匹配点,同时计算出图像变换矩阵;最后,使用RMSProp(root mean square prop)算法对变换矩阵进行优化。实验结果表明该算法在电池包焊点缺陷检测中能有效减少误匹配,且配准速度较快,满足工业检测要求。展开更多
文摘从全球导航卫星系统反射信号(Global Navigation Satellite System Reflectometry,GNSS-R)测高应用中对镜面反射点的高精度需求出发,利用GNSS-R空间几何位置关系和机器学习中的RMSprop(Root Mean Square Prop)算法对镜面反射点问题进行研究,提出了一种基于RMSprop的高精度镜面反射点预测算法,该算法能够实现对学习率的自适应调整,加速梯度下降,提高算法的收敛性能。仿真结果表明,该算法收敛快,精度高。
文摘Human Action Recognition(HAR)and pose estimation from videos have gained significant attention among research communities due to its applica-tion in several areas namely intelligent surveillance,human robot interaction,robot vision,etc.Though considerable improvements have been made in recent days,design of an effective and accurate action recognition model is yet a difficult process owing to the existence of different obstacles such as variations in camera angle,occlusion,background,movement speed,and so on.From the literature,it is observed that hard to deal with the temporal dimension in the action recognition process.Convolutional neural network(CNN)models could be used widely to solve this.With this motivation,this study designs a novel key point extraction with deep convolutional neural networks based pose estimation(KPE-DCNN)model for activity recognition.The KPE-DCNN technique initially converts the input video into a sequence of frames followed by a three stage process namely key point extraction,hyperparameter tuning,and pose estimation.In the keypoint extraction process an OpenPose model is designed to compute the accurate key-points in the human pose.Then,an optimal DCNN model is developed to classify the human activities label based on the extracted key points.For improving the training process of the DCNN technique,RMSProp optimizer is used to optimally adjust the hyperparameters such as learning rate,batch size,and epoch count.The experimental results tested using benchmark dataset like UCF sports dataset showed that KPE-DCNN technique is able to achieve good results compared with benchmark algorithms like CNN,DBN,SVM,STAL,T-CNN and so on.
文摘为了提高电动汽车电池模组焊点缺陷检测中的图像配准精度,提出一种改进的图像配准优化方法。首先,对图片进行预处理后,使用改进的Qtree_ORB算法得到图像均匀分布的特征点,通过描述符融合对特征点进行描述;其次,经过汉明距离匹配后,通过空间余弦值进行预筛选并使用渐进抽样一致性算法(PROSAC)得到强匹配点,同时计算出图像变换矩阵;最后,使用RMSProp(root mean square prop)算法对变换矩阵进行优化。实验结果表明该算法在电池包焊点缺陷检测中能有效减少误匹配,且配准速度较快,满足工业检测要求。
