Sanduao is an important sea-breeding bay in Fujian,South China and holds a high economic status in aquaculture.Quickly and accurately obtaining information including the distribution area,quantity,and aquaculture area...Sanduao is an important sea-breeding bay in Fujian,South China and holds a high economic status in aquaculture.Quickly and accurately obtaining information including the distribution area,quantity,and aquaculture area is important for breeding area planning,production value estimation,ecological survey,and storm surge prevention.However,as the aquaculture area expands,the seawater background becomes increasingly complex and spectral characteristics differ dramatically,making it difficult to determine the aquaculture area.In this study,we used a high-resolution remote-sensing satellite GF-2 image to introduce a deep-learning Richer Convolutional Features(RCF)network model to extract the aquaculture area.Then we used the density of aquaculture as an assessment index to assess the vulnerability of aquaculture areas in Sanduao.The results demonstrate that this method does not require land and water separation of the area in advance,and good extraction can be achieved in the areas with more sediment and waves,with an extraction accuracy>93%,which is suitable for large-scale aquaculture area extraction.Vulnerability assessment results indicate that the density of aquaculture in the eastern part of Sanduao is considerably high,reaching a higher vulnerability level than other parts.展开更多
本文针对实际生产中需要对工件进行自动检测,获取工件质心的问题,采用了边缘检测技术以及最小外接矩形算法对工件定位的方式,采用了BP神经网络完成相机标定.针对基于RCF的边缘检测技术生成边缘粗糙的问题,提出了一种RCF(Richer Convolut...本文针对实际生产中需要对工件进行自动检测,获取工件质心的问题,采用了边缘检测技术以及最小外接矩形算法对工件定位的方式,采用了BP神经网络完成相机标定.针对基于RCF的边缘检测技术生成边缘粗糙的问题,提出了一种RCF(Richer Convolutional Features for Edge Detection)模型的优化方法,将每个阶段用于提升特征图分辨率的反卷积操作替换成可以生成更精细边缘、时间复杂度更低的亚像素卷积.针对相机标定过程中存在的诸多需要用复杂数学模型表达的非线性畸变,提出了一个BP神经网络来拟合复杂非线性映射,实现二维像素坐标到三维机器人基坐标系下坐标的映射,实验结果表明,误差可以控制在0.5mm之内,可以满足实际应用的需要.展开更多
基金Supported by the National Key Research and Development Program of China(No.2016YFC1402003)the National Natural Science Foundation of China(No.41671436)the Innovation Project of LREIS(No.O88RAA01YA)
文摘Sanduao is an important sea-breeding bay in Fujian,South China and holds a high economic status in aquaculture.Quickly and accurately obtaining information including the distribution area,quantity,and aquaculture area is important for breeding area planning,production value estimation,ecological survey,and storm surge prevention.However,as the aquaculture area expands,the seawater background becomes increasingly complex and spectral characteristics differ dramatically,making it difficult to determine the aquaculture area.In this study,we used a high-resolution remote-sensing satellite GF-2 image to introduce a deep-learning Richer Convolutional Features(RCF)network model to extract the aquaculture area.Then we used the density of aquaculture as an assessment index to assess the vulnerability of aquaculture areas in Sanduao.The results demonstrate that this method does not require land and water separation of the area in advance,and good extraction can be achieved in the areas with more sediment and waves,with an extraction accuracy>93%,which is suitable for large-scale aquaculture area extraction.Vulnerability assessment results indicate that the density of aquaculture in the eastern part of Sanduao is considerably high,reaching a higher vulnerability level than other parts.
文摘本文针对实际生产中需要对工件进行自动检测,获取工件质心的问题,采用了边缘检测技术以及最小外接矩形算法对工件定位的方式,采用了BP神经网络完成相机标定.针对基于RCF的边缘检测技术生成边缘粗糙的问题,提出了一种RCF(Richer Convolutional Features for Edge Detection)模型的优化方法,将每个阶段用于提升特征图分辨率的反卷积操作替换成可以生成更精细边缘、时间复杂度更低的亚像素卷积.针对相机标定过程中存在的诸多需要用复杂数学模型表达的非线性畸变,提出了一个BP神经网络来拟合复杂非线性映射,实现二维像素坐标到三维机器人基坐标系下坐标的映射,实验结果表明,误差可以控制在0.5mm之内,可以满足实际应用的需要.
