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浅谈影响纺织品颜色评估的主要因素
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作者 贡建宏 《染整技术》 CAS 2012年第4期45-47,共3页
作者将自己在工作中对纺织品颜色评估的经验作了总结。
关键词 颜色评估 温湿度 光源
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无创性评估皮肤颜色的技术和方法 被引量:7
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作者 高洁 朱文元 骆丹 《临床皮肤科杂志》 CAS CSCD 北大核心 2008年第12期819-821,共3页
紫外灯、皮肤镜、共聚焦激光扫描显微镜、反射光谱分析技术和偏振光成像技术等方法和技术能无创性定性、定量分析皮肤颜色,已广泛应用于色素性疾病的诊断、美白药物和化妆品的疗效评价中。该文对上述各种方法的原理、适应证和优缺点作... 紫外灯、皮肤镜、共聚焦激光扫描显微镜、反射光谱分析技术和偏振光成像技术等方法和技术能无创性定性、定量分析皮肤颜色,已广泛应用于色素性疾病的诊断、美白药物和化妆品的疗效评价中。该文对上述各种方法的原理、适应证和优缺点作一介绍,为临床工作和科研选择适宜的方法提供理论依据。 展开更多
关键词 皮肤颜色评估 无创性
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红宝石颜色的评估
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《监督与选择》 1999年第4期36-37,共2页
红宝石以其鲜艳的红色而迷人,深受仕女们的钟爱。尤以所谓的“鸽血红”宝石最为名贵。其实红、蓝宝石同属刚玉类,均由Al_2O_3组成,只因其中含有少量的Cr^(3+)而呈红色而已。凡不现红色者,统称蓝宝石。在西方甚至将桃红色或带稍深的紫红... 红宝石以其鲜艳的红色而迷人,深受仕女们的钟爱。尤以所谓的“鸽血红”宝石最为名贵。其实红、蓝宝石同属刚玉类,均由Al_2O_3组成,只因其中含有少量的Cr^(3+)而呈红色而已。凡不现红色者,统称蓝宝石。在西方甚至将桃红色或带稍深的紫红色者,也称之为蓝宝石。 展开更多
关键词 红宝石 颜色评估 选购
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通过分析茶浸液的化学成分和颜色差异评估红茶品质
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作者 YuerongLiang 邱敦莲 《国外作物育种》 2004年第4期57-57,共1页
关键词 茶浸液 化学成分 颜色差异评估 红茶品质 主成分分析
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Autofluorescence imaging endoscopy for identifi cation and assessment of inflammatory ulcerative colitis 被引量:6
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作者 Taro Osada Atsushi Arakawa +5 位作者 Naoto Sakamoto Hiroya Ueyama Tomoyoshi Shibuya Tatsuo Ogihara Takashi Yao Sumio Watanabe 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第46期5110-5116,共7页
AIM:To validate the clinical relevance of autofluores-cence imaging(AFI)endoscopy for the assessment of inflammatory ulcerative colitis(UC).METHODS:A total of 572 endoscopic images were se-lected from 42 UC patients:2... AIM:To validate the clinical relevance of autofluores-cence imaging(AFI)endoscopy for the assessment of inflammatory ulcerative colitis(UC).METHODS:A total of 572 endoscopic images were se-lected from 42 UC patients:286 taken with white light imaging(WLI)and 286 with AFI from the same sites.WLI images were assessed for overall mucosal inflammation according to Mayo endoscopic subscore(MES),and for seven characteristic endoscopic features.Likewise,AFI photographs were scored according to relative abundance of red,green and blue color com-ponents within each image based on an RGB additive color model.WLI and AFI endoscopic scores from the same sites were compared.Histological evaluation of biopsies was according to the Riley Index.RESULTS:Relative to red(r=0.52,P<0.01)or blue(r=0.56,P<0.01)color component,the green color component of AFI(r=-0.62,P<0.01)corresponded more closely with mucosal inflammation sites.There were signif icant differences in green color components between MES-0(0.396±0.043)and MES-1(0.340± 0.035)(P<0.01),and between MES-1 and ≥ MES-2(0.318±0.037)(P<0.01).The WLI scores for "vascu-lar patterns"(r=-0.65,P<0.01),"edema"(r=-0.62,P<0.01),histology scores for "polymorphonuclear cells in the lamina propria"(r=-0.51,P<0.01)and "crypt architectural irregularities"(r=-0.51,P<0.01)showed correlation with the green color component of AFI.There were significant differences in green color components between limited(0.399± 0.042)and extensive(0.375±0.044)(P=0.014)polymorpho-nuclear cell inf iltration within MES-0.As the severity of the mucosal inflammation increased,the green color component of AFI decreased.The AFI green color com-ponent was well correlated with the characteristic en-doscopic and histological inflammatory features of UC.CONCLUSION:AFI has application in detecting inflammatory lesions,including microscopic activity in the co-lonic mucosa of UC patients,based on the green color component of images. 展开更多
关键词 Autofluorescence imaging endoscopy En-doscopic activity Histological activity Microscopic in-flammation Green color component
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Color ImageBased Defect Detection Method for Bridge Coating Assessment
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《Journal of Civil Engineering and Architecture》 2011年第11期979-985,共7页
This paper presents a highly efficient method for recognizing the existence of bridge coating rust defects by using color image processing. The detection of defects on steel bridge surfaces during the operation and ma... This paper presents a highly efficient method for recognizing the existence of bridge coating rust defects by using color image processing. The detection of defects on steel bridge surfaces during the operation and maintenance of bridge structures is important to ensure the safety and reliability of them. More advanced techniques such as digital image processing have been studied for better monitoring and detection as existing infrastructure systems are aged and deteriorated rapidly. Recently, image-based defect recognition and assessment methods have gained considerable attention in the civil engineering domain due to their accuracy, speed, and lower cost. The proposed method in this paper is a fast decision-making system by utilizing color image processing. It was developed by processing original bridge coating images to generate color values and calculating eigenvalues from each digitized image. The values from two different groups, a defective group and a nondefective group, are compared each other to figure out the feasibility of this approach. Finally, an automated defect recognition method is presented and tested with more images. This method can be used to make a decision whether a given digitized image contains defects. 展开更多
关键词 Bridge inspection image processing DECISIONMAKING infrastructure condition assessment.
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国内皮瓣移植术后微循环监测管理的调查研究 被引量:9
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作者 彭伶丽 刘明明 +3 位作者 杨佳琪 陈娴 张燕 唐举玉 《中华显微外科杂志》 CSCD 北大核心 2020年第5期512-514,共3页
目的了解我国皮瓣移植术后微循环监测现状,为规范显微外科医护人员在皮瓣移植术后微循环监测及管理提供依据。方法采用自行设计的问卷,在2017年9月第七届中国穿支皮瓣高峰论坛现场,对来自全国的266名显微外科医护人员进行调查。调查内... 目的了解我国皮瓣移植术后微循环监测现状,为规范显微外科医护人员在皮瓣移植术后微循环监测及管理提供依据。方法采用自行设计的问卷,在2017年9月第七届中国穿支皮瓣高峰论坛现场,对来自全国的266名显微外科医护人员进行调查。调查内容包括:一般资料、术后微循环监测现状、监测指标、方法和记录方式,共计20个条目。结果251名(94.36%)所在科室开展了皮瓣移植术后微循环监测,其中有专门术后微循环监测的记录单占66.92%,使用颜色评估工具的占9.56%,使用红外线皮温计的占17.13%,使用皮瓣微循环分区监测的占15.94%;169名(67.21%)所在科室对术后微循环监测7~10 d。皮瓣监测的颜色3种及以下为主,时段及频次也不一致。结论我国皮瓣移植术后微循环监测方法、时段、频次、记录及监测辅助工具的使用均不统一,不同等级医院存在差异,有必要建立规范的皮瓣移植术后微循环监测标准。 展开更多
关键词 皮瓣移植 微循环监测 皮瓣颜色评估工具 血管危象
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More than mimicry? Evaluating scope for flicker-fusion as a defensive strategy in coral snake mimics 被引量:1
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作者 Georgia C. TITCOMB David W. KIKUCHI David W. PFENNIG 《Current Zoology》 SCIE CAS CSCD 2014年第1期123-130,共8页
Coral snakes and their mimics often have brightly colored banded patterns, generally associated with warning colora- tion or mimicry. However, such color patterns have also been hypothesized to aid snakes in escaping ... Coral snakes and their mimics often have brightly colored banded patterns, generally associated with warning colora- tion or mimicry. However, such color patterns have also been hypothesized to aid snakes in escaping predators through a "flicker-fusion" effect. According to this hypothesis, banded color patterns confuse potential predators when a snake transitions from resting to moving because its bands blur together to form a different color. To produce this motion blur, a moving snake's bands must transition faster than the critical flicker-fusion rate at which a predator's photoreceptors can refresh. It is unknown if coral snakes or their mimics meet this requirement. We tested this hypothesis by measuring the movement speed and color pat- terns of two coral snake mimics, Lampropeltis triangulum campbelli and L. elapsoides, and comparing the frequency of color transitions to the photoreceptor activity of the avian eye. We found that snakes often produced a motion blur, but moving snakes created a blurring effect more often in darker conditions, such as sunrise, sunset, and nighttime when these snakes are often active. Thus, at least two species of coral snake mimics are capable of achieving flicker-fusion, indicating that their color patterns may confer an additional defense aside from mimicry 展开更多
关键词 Coral snake mimicry Flicker-fusion effect CFF Kingsnake Defensive strategy
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Aesthetic Visual Style Assessment on Dunhuang Murals 被引量:1
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作者 杨冰 许端清 +2 位作者 唐大伟 杨鑫 赵磊 《Journal of Shanghai Jiaotong university(Science)》 EI 2014年第1期28-34,共7页
Dunhuang murals are gems of Chinese traditional art. This paper demonstrates a simple, yet powerful method to automatically identify the aesthetic visual style that lies in Dunhuang murals. Based on the art knowledge ... Dunhuang murals are gems of Chinese traditional art. This paper demonstrates a simple, yet powerful method to automatically identify the aesthetic visual style that lies in Dunhuang murals. Based on the art knowledge on Dunhuang murals, the method explicitly predicts some of possible image attributes that a human might use to understand the aesthetic visual style of a mural. These cues fall into three broad types: ① composition attributes related to mural layout or configuration; ② color attributes related to color types depicted; ③ brightness attributes related to bright conditions. We show that a classifier trained on these attributes can provide an efficient way to predict the aesthetic visual style of Dunhuang murals. 展开更多
关键词 Dunhuang murals aesthetic visual style feature descriptors
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