Biometric identification was a kind of identity recognition technology by making use of the human's unique physiological or behavioral characteristics,it provided a high reliability and stability way for the ident...Biometric identification was a kind of identity recognition technology by making use of the human's unique physiological or behavioral characteristics,it provided a high reliability and stability way for the identification. Global threshold binarization palmprint image is used in this paper,and the bio-morphological methods are used to get the sensitive area of palmprint image's positioning point,so as to extract the region of interest. The palmprint collection is realized on the FPGA chip,and this kind of collection method uses the DSP Builder toolbox to realize visual programming in Matlab / Simulink and achieve fast modeling and development. The practice proves that this method is simple,flexible and its equipment is portable and fast.展开更多
目的探讨中脑导水管面积、感兴趣区域(ROI)大小对脑脊液(CSF)流量检测的影响。方法19名志愿者纳入研究,3.0-T磁共振,手动ROI放置对导水管CSF流量定量分析,比较5、10、15mm2大小ROI检测CSF流量的结果(对应为SV5、SV10、SV15)。心动周期...目的探讨中脑导水管面积、感兴趣区域(ROI)大小对脑脊液(CSF)流量检测的影响。方法19名志愿者纳入研究,3.0-T磁共振,手动ROI放置对导水管CSF流量定量分析,比较5、10、15mm2大小ROI检测CSF流量的结果(对应为SV5、SV10、SV15)。心动周期内进行12次扫描,测量导水管不同时间点的面积并进行分析。依据不同面积设计新方法计算流量(SVtotal),与常规方法检测的流量(SVnormal)进行比较。结果SV5显著低于SV10(0.003±0.002 m L vs.0.0057±0.0025 m L,P=0.031)和SV15(0.0068±0.0034m L,P=0.035)。心动周期内导水管的面积存在差别(P=0.01),SVTotal显著低于SVNomal(0.005±0.003m L vs.0.0069±0.0027 m L,P=0.023)。结论中脑导水管面积变化、ROI面积对CSF流量的检测有影响。展开更多
Based on the ideas of controlling relative quality and rearranging bitplanes, a new ROI coding method for JPEG2000 was proposed, which shifts and rearranges bitplanes in units of bitplane groups. It can code arbitrary...Based on the ideas of controlling relative quality and rearranging bitplanes, a new ROI coding method for JPEG2000 was proposed, which shifts and rearranges bitplanes in units of bitplane groups. It can code arbitrary shaped ROI without shape coding, and reserve almost arbitrary percent of background information. It also can control the relative quality of progressive decoded images. In addition, it is easy to be implemented and has low computational cost.展开更多
感兴趣区域(Region of interest,ROI)提取在生物特征识别中,常用于减少后续处理的计算消耗,提高识别模型的准确性,是生物识别系统中预处理的关键步骤.针对生物识别数据,提出了一种鲁棒的ROI提取方法.方法使用语义分割模型作为基础,通过...感兴趣区域(Region of interest,ROI)提取在生物特征识别中,常用于减少后续处理的计算消耗,提高识别模型的准确性,是生物识别系统中预处理的关键步骤.针对生物识别数据,提出了一种鲁棒的ROI提取方法.方法使用语义分割模型作为基础,通过增加全局感知模块,与分割模型形成对抗结构,为模型提供先验知识,补充全局视觉模式信息,解决了语义分割模型的末端收敛困难问题,提高了模型的鲁棒性和泛化能力.在传统二维(2D)指纹、人脸、三维(3D)指纹和指纹汗孔数据集中验证了方法的有效性.实验结果表明,相比于现有方法,所提出的ROI提取方法更具鲁棒性和泛化能力,精度最高.展开更多
Autonomous lane keeping is an important technology in intelligent transportation,which is used to avoid unnecessary traffic accidents caused by lane departure.To adapt different lighting environment,and make up ordina...Autonomous lane keeping is an important technology in intelligent transportation,which is used to avoid unnecessary traffic accidents caused by lane departure.To adapt different lighting environment,and make up ordinary Hough transform’s shortcomings of tardiness and poor immunity,we propose an improved algorithm by using adaptive gray threshold and setting Region of interest(ROI),to do the quick Hough transform for tracking lane line,implementing autonomous lane keeping. The dynamic adaptive threshold method can be suitable with different lighting conditions and quickly,accurately remove most of the information not relative to lane line.Meanwhile setting ROI can let the program only care about the specific region which can provide useful information and further reduce the processing data.And then on the basic of identification,we put forward some efficient innovation strategy about the control logic of straight state,curve state and the transition state.The experiment proves that this solution greatly raises efficiency.展开更多
A novel mathematical morphological approach for region of interest(ROI) automatic determination and JPEG2000-based coding of microscopy image compression is presented.The algorithm is very fast and requires lower comp...A novel mathematical morphological approach for region of interest(ROI) automatic determination and JPEG2000-based coding of microscopy image compression is presented.The algorithm is very fast and requires lower computing power,which is particularly suitable for some irregular region-based cell microscopy images with poor qualities.Firstly,an active threshold-based method is discussed to create a rough mask of regions of interest(cells).And then some morphological operations are designed and applied to achieve the segmentation of cells.In addition,an extra morphological operation,dilation,is applied to create the final mask with some redundancies to avoid the"edge effect"after removing false cells.Finally,ROI and region of background(ROB) are obtained and encoded individually in different compression ratio flexibly based on the JPEG2000,which can adjust the quality between ROI and ROB without coding for ROI shape.The experimental results certify the effectiveness of the proposed algorithm,and compared with JPEG2000,the proposed algorithm has better performance in both subjective quality and objective quality at the same compression ratios.展开更多
River basin is a special region with the characteristics of entirety and relation, regionality and diversity,gradation and network, openness and dissipation etc. It is an important unit that organizes and governs nati...River basin is a special region with the characteristics of entirety and relation, regionality and diversity,gradation and network, openness and dissipation etc. It is an important unit that organizes and governs nationaleconomy as well as a natural region. In river basin, all natural essential factors relate closely each other, and there isremarkable influence between inter-regions. In the process of developing river basin, the multiplex main interest body,the diverse interest demand and the multi-ways of interest realization constitute a complicated interest network, and resultin various contradictions and conflicts. Therefore, effective regional interest coordination mechanism should be estab-lished to coordinate various regional interest relations. They are the public interest realization mechanism, the fairinterest assignment mechanism, the effective interest integration mechanism, the expedited interest expression mecha-nism and the reasonable interest compensative mechanism.展开更多
提出一个基于改进的Itti-Koch模型的感兴趣区域(Region of interest,ROI)提取算法,同时针对图像亮度特征对ROI提取的影响问题,从2个方面进行分析研究:一是根据不同亮度权重下提取的ROI,分析亮度特征对ROI提取的影响程度;二是对眼动数据...提出一个基于改进的Itti-Koch模型的感兴趣区域(Region of interest,ROI)提取算法,同时针对图像亮度特征对ROI提取的影响问题,从2个方面进行分析研究:一是根据不同亮度权重下提取的ROI,分析亮度特征对ROI提取的影响程度;二是对眼动数据提取图像的ROI和基于改进的Itti-Koch模型提取的图像ROI进行区域评价,计算两者之间的点对点区域相似度和位置区域相似度。研究结果表明:当亮度特征和颜色特征同时影响图像ROI提取时,亮度特征所占权重不宜超过0.5。展开更多
文摘Biometric identification was a kind of identity recognition technology by making use of the human's unique physiological or behavioral characteristics,it provided a high reliability and stability way for the identification. Global threshold binarization palmprint image is used in this paper,and the bio-morphological methods are used to get the sensitive area of palmprint image's positioning point,so as to extract the region of interest. The palmprint collection is realized on the FPGA chip,and this kind of collection method uses the DSP Builder toolbox to realize visual programming in Matlab / Simulink and achieve fast modeling and development. The practice proves that this method is simple,flexible and its equipment is portable and fast.
文摘目的探讨中脑导水管面积、感兴趣区域(ROI)大小对脑脊液(CSF)流量检测的影响。方法19名志愿者纳入研究,3.0-T磁共振,手动ROI放置对导水管CSF流量定量分析,比较5、10、15mm2大小ROI检测CSF流量的结果(对应为SV5、SV10、SV15)。心动周期内进行12次扫描,测量导水管不同时间点的面积并进行分析。依据不同面积设计新方法计算流量(SVtotal),与常规方法检测的流量(SVnormal)进行比较。结果SV5显著低于SV10(0.003±0.002 m L vs.0.0057±0.0025 m L,P=0.031)和SV15(0.0068±0.0034m L,P=0.035)。心动周期内导水管的面积存在差别(P=0.01),SVTotal显著低于SVNomal(0.005±0.003m L vs.0.0069±0.0027 m L,P=0.023)。结论中脑导水管面积变化、ROI面积对CSF流量的检测有影响。
基金Electronic Development Fund of Ministry ofInformation Industry of China(No[2004]479)
文摘Based on the ideas of controlling relative quality and rearranging bitplanes, a new ROI coding method for JPEG2000 was proposed, which shifts and rearranges bitplanes in units of bitplane groups. It can code arbitrary shaped ROI without shape coding, and reserve almost arbitrary percent of background information. It also can control the relative quality of progressive decoded images. In addition, it is easy to be implemented and has low computational cost.
文摘感兴趣区域(Region of interest,ROI)提取在生物特征识别中,常用于减少后续处理的计算消耗,提高识别模型的准确性,是生物识别系统中预处理的关键步骤.针对生物识别数据,提出了一种鲁棒的ROI提取方法.方法使用语义分割模型作为基础,通过增加全局感知模块,与分割模型形成对抗结构,为模型提供先验知识,补充全局视觉模式信息,解决了语义分割模型的末端收敛困难问题,提高了模型的鲁棒性和泛化能力.在传统二维(2D)指纹、人脸、三维(3D)指纹和指纹汗孔数据集中验证了方法的有效性.实验结果表明,相比于现有方法,所提出的ROI提取方法更具鲁棒性和泛化能力,精度最高.
文摘Autonomous lane keeping is an important technology in intelligent transportation,which is used to avoid unnecessary traffic accidents caused by lane departure.To adapt different lighting environment,and make up ordinary Hough transform’s shortcomings of tardiness and poor immunity,we propose an improved algorithm by using adaptive gray threshold and setting Region of interest(ROI),to do the quick Hough transform for tracking lane line,implementing autonomous lane keeping. The dynamic adaptive threshold method can be suitable with different lighting conditions and quickly,accurately remove most of the information not relative to lane line.Meanwhile setting ROI can let the program only care about the specific region which can provide useful information and further reduce the processing data.And then on the basic of identification,we put forward some efficient innovation strategy about the control logic of straight state,curve state and the transition state.The experiment proves that this solution greatly raises efficiency.
文摘A novel mathematical morphological approach for region of interest(ROI) automatic determination and JPEG2000-based coding of microscopy image compression is presented.The algorithm is very fast and requires lower computing power,which is particularly suitable for some irregular region-based cell microscopy images with poor qualities.Firstly,an active threshold-based method is discussed to create a rough mask of regions of interest(cells).And then some morphological operations are designed and applied to achieve the segmentation of cells.In addition,an extra morphological operation,dilation,is applied to create the final mask with some redundancies to avoid the"edge effect"after removing false cells.Finally,ROI and region of background(ROB) are obtained and encoded individually in different compression ratio flexibly based on the JPEG2000,which can adjust the quality between ROI and ROB without coding for ROI shape.The experimental results certify the effectiveness of the proposed algorithm,and compared with JPEG2000,the proposed algorithm has better performance in both subjective quality and objective quality at the same compression ratios.
文摘River basin is a special region with the characteristics of entirety and relation, regionality and diversity,gradation and network, openness and dissipation etc. It is an important unit that organizes and governs nationaleconomy as well as a natural region. In river basin, all natural essential factors relate closely each other, and there isremarkable influence between inter-regions. In the process of developing river basin, the multiplex main interest body,the diverse interest demand and the multi-ways of interest realization constitute a complicated interest network, and resultin various contradictions and conflicts. Therefore, effective regional interest coordination mechanism should be estab-lished to coordinate various regional interest relations. They are the public interest realization mechanism, the fairinterest assignment mechanism, the effective interest integration mechanism, the expedited interest expression mecha-nism and the reasonable interest compensative mechanism.
文摘提出一个基于改进的Itti-Koch模型的感兴趣区域(Region of interest,ROI)提取算法,同时针对图像亮度特征对ROI提取的影响问题,从2个方面进行分析研究:一是根据不同亮度权重下提取的ROI,分析亮度特征对ROI提取的影响程度;二是对眼动数据提取图像的ROI和基于改进的Itti-Koch模型提取的图像ROI进行区域评价,计算两者之间的点对点区域相似度和位置区域相似度。研究结果表明:当亮度特征和颜色特征同时影响图像ROI提取时,亮度特征所占权重不宜超过0.5。