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A comparison of animal color measurements using a commercially available digital color sensor and photograph analysis

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Current Zoology 2020年第6期66卷 601-606页

作者： Alex D.Potash Daniel U.Greene Gabrielle A.Foursa Verity L.Mathis L.Mike Conner Robert A.McCleery Department of Wildlife Ecology and Conservation University of Florida Institute of Food and Agricultural ScienceGainesvilleFL 32611USA Weyerhaeuser Company Environmental Research SouthColumbusMS 39701USA Department of Biology University of FloridaGainesvilleFL 32611USA Florida Museum of Natural History University of FloridaGainesvilleFL 32611USA The Jones Center at Ichauway NewtonGA 39870USA

An animal's pelage,feather,or skin color can serve a variety of functions,so it is important to have multiple standardized methods for measuring *** of the most common and reliable methods for measuring animal coloration is the use of standardized digital photographs of *** tech no logy in the form of a commercially available handheld digital color sensor could provide an alter native to photography-based animal color *** determine whether a digital color sensor could be used to measure animal coloration,we tested the ability of a digital color sensor to measure coloration of mammalian,avian,and lepidopteran museums *** compared results from the sensor to measurements taken using traditional photography *** study yielded significant differences between photography-based and digital color sensor measurements of brightness(light to dark)and colors along the green to red *** was no difference between photographs and the digital color sensor measurements for colors along the blue to yellow *** average difference in recorded color(AE)by the 2 methods was above the threshold at which humans can perceive a *** were sign讦icant correlations between the sensor and photographs for all measurements indicating that the sensor is an effective animal coloration measuring ***,the sensor's small aperture and narrow light spectrum range designed for human-vision limit its value for ecological *** discuss the conditions in which a digital color sensor can be an effective tool for measuring animal coloration in both laboratory settings and in the field.

关键词： animal coloration color measurement comparative method digital photography museum specimens Nix color sensor

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Influence of surface roughness on the color of dental-resin composites

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第7期12卷 552-562页

作者： Razvan GHINEA Laura UGARTE-ALVAN Ana YEBRA Oscar E.PECHO Rade D.PARAVINA Maria del Mar PEREZ Department of Optics Faculty of ScienceUniversity of Granada Department of Stomatology Faculty of OdontologyUniversity of Granada Houston Center for Biomaterials and Biomimetics & Department of Restorative Dentistry and Biomaterials University of Texas Dental Branch at Houston

This study deals with the influence of surface roughness on the color of resin *** resin composites (microfilled,hybrid,and microhybrid) were each polished with 500-grit,1 200-grit,2 000-grit,and 4 000-grit SiC *** roughness parameter (Ra) was measured using a Plμ confocal microscope,and field-emission scanning electron microscope (Fe-SEM) images were used to investigate filler *** was measured using a spectroradiometer and a D65 standard illuminant (geometry diffuse/0° specular component excluded (SCE) mode).Surface roughness decreased with grit number and was not influenced by filler size or size distribution.A significant influence of Ra on lightness (L*) was *** increased with decreases in roughness,except for specimens that underwent polishing procedure 4 (PP4;500-grit,1 200-grit,2 000-grit,and 4 000-grit SiC papers consecutively).Generally,it was found that surface roughness influenced the color of resin *** composites that underwent PP1 (500-grit SiC paper) exhibited significant differences in chroma (C*),hue (h°),and lightness (L*) compared to composites that underwent PP3 (500-grit,1 200-grit,and 2 000-grit SiC papers consecutively) and *** difference (E*) between the polishing procedures was within acceptability thresholds in dentistry.

关键词： color measurement Dental resin composites Roughness

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Integral colorimeter based on compound LED illumination

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Chinese Optics Letters 2014年第2期12卷 74-77页

作者：袁琨严惠民金尚忠 State Key Laboratory of Modern Optical Instrument Zhejiang University College of Optical and Electronic Technology China Jiliang University

Traditional integral colorimeters use tungsten–halogen or xenon lamps for illumination,as well as correcting filters to make the instrument＇s spectral response meet the Luther *** structure causes the instruments to have relatively higher error and poor ***,this letter proposes a new measurement design that uses compound LEDs as the instrument＇s measurement light *** new design adjusts the instrument＇s spectral response by modifying the spectra of the compound LEDs.A compound LED light source is designed for integral colorimeters,and an experiment is conducted to evaluate the performance of the integral *** show that the design effectively reduces the error of integral colorimeters.

关键词： color measurement colorimetry Light sources Metrological instrumentation Standard observers Visible light

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神经网络控制液晶光阀在光谱合成中的应用(英文)

神经网络控制液晶光阀在光谱合成中的应用(英文)

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“科技增强国力，青年开创未来——携手走向辉煌的新世纪”中国科协第三届青年学术年会

作者：王文隽丰冈了马尔科·卡萨里日本埼玉大学理工科研究生院

提出了一种光源装置,其输出光的光谱分布可在计算机的控制下任意合成。为控制该装置中的液晶空间光调制器,提出了一种带学习信号的神经网络。首先在液晶空间光调制器上写入一组正弦信号,同时测量输出光的光谱分布,让神经网络学习这两组... 详细信息

提出了一种光源装置,其输出光的光谱分布可在计算机的控制下任意合成。为控制该装置中的液晶空间光调制器,提出了一种带学习信号的神经网络。首先在液晶空间光调制器上写入一组正弦信号,同时测量输出光的光谱分布,让神经网络学习这两组信号,神经网络可找出其对应关系。然后将所要的光谱分布输入学习后的神经网络,其输出结果就是为得到该光谱分布而应写入液晶空间光调制器上的信号。经测试,该装置及方法在合成光谱分布时的平均误差为12%。

关键词： neural network spectral synthesis LCSLM color measurement

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