Spectral deconvolution applications for colorimetry

Deconvolution based on the Richardson‐Lucy algorithm, recently suggested to be an effective method of reducing instrumental broadening effects in radiometric spectra, is applied to two examples relevant to colorimetry. The first is chromaticity measurement of light‐emitting diodes, where results are compared with more traditional weighted‐mean bandwidth correction. The second is accurate calibration of the wavelength scale of a medium‐resolution array spectrometer. Deconvolution is shown to be an effective tool in both cases. © 2013 Wiley Periodicals, Inc. Col Res Appl, 39, 430–435, 2014     

超大型三维有限元模型的快速可视化算法

针对超大型三维有限元模型的特点,总结了其可视化任务的基本需求和关键算法。由此分别为网格、单元、剖面可视化,以及绘制彩色云图等不同任务,编制了结构简单、运行可靠的快速显示算法。通过具体工程实例与典型商业程序的对比验证,初步证明了该算法的可行性和优越性,有助于简化超大型有限元程序的编写过程。     

影响增塑剂邻苯二甲酸酯产品色值的因素

就连续化生产装置影响产品色值的因素和对策进行了探讨。确定增塑剂生产过程中,低沸物含量、氧化、中和水洗、脱色过滤为影响产品色值的主要因素。     

Emotional response to color across media

In this study, the characteristics of emotional responses to color are explored in two empirical studies. In particular, the relationship between color attributes and emotional dimensions—valence, arousal, and dominance—is analyzed. To account for the cognitive quantity of color, 36 color stimuli were selected following hue and tone categorizations and based on the CIELAB LCh system. In one experiment, the colors were presented on A5‐size glossy paper whereas the identical colors were displayed on CRT monitors in the other experiment. In both experiments, the subjects assessed the emotional responses to each color stimulus using a Self‐Assessment‐Manikin (SAM), which consists of three rows of five pictograms illustrating the three dimensions of emotion, respectively. The empirical results provide evidence that the patterns of affective judgment of colors can be profiled in terms of the three dimensions of emotion (Reliability coefficient, Cronbach's alpha > 0.7). All three attributes of colors, i.e. hue, Chroma, and Lightness, influenced the emotional responses (repeated measurement One‐way ANOVA, P < 0.05), and especially, Chroma was always positively correlated with each of the three emotional dimensions (r > 0.60 P < 0.01). Moreover, the results indicate that emotional responses to color vary more strongly with regard to tone than to hue categories. Comparing the SAM ratings between the two experiments, a systemic explanation has yet to be found to conclude that there is a media effect on the emotional responses to colors. Furthermore, the process of affective judgment of colors and the limit of color as an emotion elicitor are discussed. © 2009 Wiley Periodicals, Inc., Col Res Appl, 2010.     

How Maillard Reaction Influences Sensorial Properties (Color,Flavor and Texture) of Food Products?

ABSTRACT

Maillard reaction products are largely responsible for the development of color, taste and especially aroma of thermally treated food. For this reason, our review focused on gathering literature from the last 10 years about the influence of the Maillard reaction products formation on food acceptance in aspects of color, texture and flavor. Maillard reaction products have a characteristic odor note and can significantly positively or negatively influence the sensory acceptance of a product. For example, pyrazines and thiols were found in most cases as the most potential odor compounds formed in MR. Another important aspect of high sensorial acceptability is food color. Color development of thermally treated products is mainly attributed to the formation of brown polymers called melanoidins. It was also noted that the increasing concentration of “probably carcinogenic and mutagenic” acrylamide is related to the darker color of a product. Not much attention is focused on the connection between Maillard reaction products formation and textural properties. Therefore, textural properties have been mostly investigated in meat products. Changes in the texture of meat products were estimated as the difference in linkage formations between proteins and polysaccharides.     

浅谈小功率金卤灯色温(上)

简要介绍色温相关知识;以原子受激发光原理为基础,结合金卤灯发光原理详细阐述了金卤灯光源中色温偏差的原因,为提高金卤灯色温一致性提出参考意见。     

Quantitative evaluation of perceived whiteness based on a color vision model

This article describes a new perceived whiteness index, C/V index, which focuses on the brightness‐enhancement effect of color components included in the spectral reflectance factor distribution of approximate white objects or in the spectral power distribution of illuminations. The index is developed on the basis of a color vision model. The perceived whiteness of 18 approximate white samples was evaluated, and then a predictability of the index was compared with 17 types of existing whiteness indices. As a result, the C/V index was one of the indices indicating the best predicting performance. The aforementioned findings show that the C/V index is effective in evaluating the perceived whiteness of approximate white objects and the brightness‐enhancement effect of color components is an important factor in determining the perceived whiteness. © 2009 Wiley Periodicals, Inc. Col Res Appl, 2010     

LED背光源现况与展望

现阶段,LED被广泛地应用到中小尺寸背光源中,大尺寸TV背光源也由原来的CCFL向LED转变。LED背光源的优势有低能耗、无汞环保、超薄化结构设计、高色彩饱和度、高品质画面显示,其应用领域广阔,几乎涵盖了中小尺寸、大尺寸显示应用领域。文章介绍了国内外LED背光源的标准体系建立情况,并根据当前产业面临的困难提出大尺寸LED背光源的发展方向。     

浅谈居室环境的色彩设计

在居室环境中,色彩不仅能唤起人们的第一视觉印象,还能够增强人的某些情感,合理的色彩搭配也是一种品味的体现.本文结合色彩的设计方法,主要从居室的重点空间介绍色彩的实际运用.     

Colour appearance shifts in two different‐sized viewing conditions

This study assessed the effect of size on colour appearance, using a colour matching paradigm where two sizes were presented in a setting similar to a normal colour selection interface. Twelve colours sampling the entire range of the colour spectrum were chosen as target stimuli. The target stimuli consisted of either a large (30° by 50°) or a small (0.5° by 0.5°) test field displayed on a cathode ray tube (CRT). In the experiment, a set of small colour samples consisting of the target and its neighboring colours was presented on the screen. Fifty‐seven participants were asked to pick a colour from the sample set that appeared to exactly match the target. Results in CIECAM02 showed a consistent increase in the apparent brightness (Q) but some decrease in saturation (s) for the larger field. Hue shifts were observed to form a systematic pattern. We noticed a discernable trend showing that, for targets of bluish or purplish colour hues, the accuracy of colour matching is lower and colour difference is greater in the condition of the large viewing field. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2010