针对复杂背景条件下目标难以识别的问题,采用彩色偏振成像技术,提出了一种基于彩色偏振图像的目标增强方法。该方法首先根据分焦平面彩色偏振相机获得的数据得到彩色线偏振度(degree of linear polarization, DoLP)、彩色偏振角(angle o...针对复杂背景条件下目标难以识别的问题,采用彩色偏振成像技术,提出了一种基于彩色偏振图像的目标增强方法。该方法首先根据分焦平面彩色偏振相机获得的数据得到彩色线偏振度(degree of linear polarization, DoLP)、彩色偏振角(angle of polarization, AoP)和彩色强度(S0)图像;然后利用目标和背景的彩色偏振特性差异大的特点提取DoLP、AoP和S0的视觉显著度,使目标得到初步的增强;随后将3种视觉显著度图像转到HSV空间进行融合,最后转到RGB空间显示。使用对比度和矢量角度距离作为客观评价指标开展实验,多个实验场景数据表明,融合图像的对比度和矢量角度距离分别比融合前图像最高提升了3.971倍和1.711倍。展开更多
2022年6月美国胃肠病学会(the American College of Gastroenterology,ACG)发布了胃肠道上皮下病变(subepithelial lesions,SEL)的诊断与临床管理指南,该指南基于目前可用的已发表文献,应用推荐、评估、发展和评价分级(grading of recom...2022年6月美国胃肠病学会(the American College of Gastroenterology,ACG)发布了胃肠道上皮下病变(subepithelial lesions,SEL)的诊断与临床管理指南,该指南基于目前可用的已发表文献,应用推荐、评估、发展和评价分级(grading of recommendations,assessment,development,and evaluation,GRADE)的方法,提出11个推荐建议和6个核心概念[1],旨在为SEL患者提出更好的治疗方法。展开更多
With the framework of exterior product,we investigate the relationship between composite multiscale entropy[CMSE]and refractive index and absorption coefficient by reanalyzing six concentrations of bovine serum albumi...With the framework of exterior product,we investigate the relationship between composite multiscale entropy[CMSE]and refractive index and absorption coefficient by reanalyzing six concentrations of bovine serum albumin aqueous solutions from the published work.Two bivectors are constructed by CMSE and its square by the refractive index and absorption coefficient under vectorization.The desirable linear behaviors can be captured,not only between the defined two bivectors in normalized magnitudes,but also between the normalized magnitude of bivectors pertinent to CMSE and the magnitude of a single vector on the refractive index or absorption coefficient,with the processing of optimum selection.Besides that,the relationship between the coefficients of two bivectors is also considered.The results reveal that plenty of sound linear behaviors can be found and also suggest the scale of 15,16 and frequency of 0.2,0.21 THz are prominent for those linear behaviors.This work provides a new insight into the correlation between terahertz[THz]time and frequency domain information.展开更多
文摘针对复杂背景条件下目标难以识别的问题,采用彩色偏振成像技术,提出了一种基于彩色偏振图像的目标增强方法。该方法首先根据分焦平面彩色偏振相机获得的数据得到彩色线偏振度(degree of linear polarization, DoLP)、彩色偏振角(angle of polarization, AoP)和彩色强度(S0)图像;然后利用目标和背景的彩色偏振特性差异大的特点提取DoLP、AoP和S0的视觉显著度,使目标得到初步的增强;随后将3种视觉显著度图像转到HSV空间进行融合,最后转到RGB空间显示。使用对比度和矢量角度距离作为客观评价指标开展实验,多个实验场景数据表明,融合图像的对比度和矢量角度距离分别比融合前图像最高提升了3.971倍和1.711倍。
文摘2022年6月美国胃肠病学会(the American College of Gastroenterology,ACG)发布了胃肠道上皮下病变(subepithelial lesions,SEL)的诊断与临床管理指南,该指南基于目前可用的已发表文献,应用推荐、评估、发展和评价分级(grading of recommendations,assessment,development,and evaluation,GRADE)的方法,提出11个推荐建议和6个核心概念[1],旨在为SEL患者提出更好的治疗方法。
基金Supported by National Natural Science Foundation of China (11804209)Natural Science Foundation of Shanxi Province under(201901D211173)Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2019 L0064)。
基金supported by the National Natural Science Foundation of China(Nos.U1837202 and 11804209)Joint Funds of the Equipment Pre-research and Aerospace Science and Technology(No.6141B061006)。
文摘With the framework of exterior product,we investigate the relationship between composite multiscale entropy[CMSE]and refractive index and absorption coefficient by reanalyzing six concentrations of bovine serum albumin aqueous solutions from the published work.Two bivectors are constructed by CMSE and its square by the refractive index and absorption coefficient under vectorization.The desirable linear behaviors can be captured,not only between the defined two bivectors in normalized magnitudes,but also between the normalized magnitude of bivectors pertinent to CMSE and the magnitude of a single vector on the refractive index or absorption coefficient,with the processing of optimum selection.Besides that,the relationship between the coefficients of two bivectors is also considered.The results reveal that plenty of sound linear behaviors can be found and also suggest the scale of 15,16 and frequency of 0.2,0.21 THz are prominent for those linear behaviors.This work provides a new insight into the correlation between terahertz[THz]time and frequency domain information.
