Relationship between brightness/luminance ratio and additivity‐law failure

The degree of additivity‐law failure of a mixture color consisting of two component chromatic colors has very complex characteristics depending on the used component colors and their mixing conditions. It is significantly affected by the mixture‐color chromaticity and by the brightness/luminance ratio at the chromaticity. A simple relationship was derived between the following quantities: degree of additivity‐law failure, additivity‐law luminance (luminance of the mixture color derived by postulating additivity law), and brightness/luminance ratio at the chromaticity of the mixture color. This relationship can be applied to any additivity‐law failure experiment and any formula on brightness/luminance ratio. © 2002 Wiley Periodicals, Inc. Col Res Appl, 27, 185–190, 2002; Published online in Wiley Interscience (www.interscience.wiley.com). DOI 10.1002/col.10045     

Accuracy of brightness discrimination as measured by concurrent verbal responses and GSRs.

"In… subliminal perception experiments some response shows discriminative accuracy at stimulus values below the threshold of awareness determined by classical psychophysical techniques. The procedure is objectionable because the threshold measure admits extraneous variance that the measure of 'subliminal accuracy' does not… . This experiment compares the discriminative accuracy of GSR and verbal response when assessed by the same forced-choice psychophysical technique." Results indicated "the verbal response showed significantly higher correlation with the stimulus than did the GSR… neither response was significantly more accurate than the other." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

液晶电视的显示原理及技术特点

结合液晶电视的显示原理,对液晶电视的技术特点进行了分析,并与PDP、CRT显示技术进行了比对。     

基于亮度补偿算法的显示子系统低功耗的设计

低功耗设计是嵌入式系统的一个重要课题,显示系统的功耗在整个系统功耗占有很大比例,降低显示系统功耗成为嵌入式低功耗设计的重中之重。设计基于WindowsMobile操作系统、PXA270处理器,以标准亮度补偿算法为基础,动态降低背光电流以节省功耗,同时相应的调整LCD屏的光透过率,以补偿背光亮度降低带来的图像亮度降低,在人眼可接受的失真范围内,实现了系统功耗的降低。整个设计在驱动层实现,功能稳定,有很好的可移植性。     

动态控制的LED背光源设计

以往因CCFL亮度的不可控性,液晶电视是采用调节LCD的控制电压,改变液晶的透过率,来实现对LCD总体亮度的控制,这种方式在很多情况下造成背光模组的光能和电能浪费。而采用亮度动态控制的方式可以很方便地通过调节LED背光源电源的电压或输入电流的大小,从而改变LED的发光强度的方案,可使电视在LED较低能耗条件下工作。亮度动态控制就是通过对显示的画面进行分析,得到不同区域的最佳亮度同时控制LED背光达到相应的亮度。     

Saliency-based framework for facial expression recognition

This article proposes a novel framework for the recognition of six universal facial expressions. The framework is based on three sets of features extracted from a face image: entropy, brightness, and local binary pattern. First, saliency maps are obtained using the state-of-the-art saliency detection algorithm “frequency-tuned salient region detection”. The idea is to use saliency maps to determine appropriate weights or values for the extracted features (i.e., brightness and entropy).We have performed a visual experiment to validate the performance of the saliency detection algorithm against the human visual system. Eye movements of 15 subjects were recorded using an eye-tracker in free-viewing conditions while they watched a collection of 54 videos selected from the Cohn-Kanade facial expression database. The results of the visual experiment demonstrated that the obtained saliency maps are consistent with the data on human fixations. Finally, the performance of the proposed framework is demonstrated via satisfactory classification results achieved with the Cohn-Kanade database, FG-NET FEED database, and Dartmouth database of children’s faces.     

钾盐对氰化镀铜溶液性能的影响

研究了钾盐对氰化镀铜溶液性能的影响,结果表明,向镀液中加30～60 g/L的硫酸钾,能够明显提高镀层的光亮度和镀液的覆盖能力,当采用较低质量浓度氰化镀铜溶液时,硫酸钾能够提高镀液的分散能力.生产实践表明:在挂镀氰化镀铜槽中用硫酸钾取代有机光亮剂能够提高镀层与基体之间的结合力.     

On the bright side: The influence of brightness on overall taste intensity perception

Ambient light luminance (i.e., brightness or dimness) is a frequently used tool by managers to enhance the overall ambience in their restaurants. The current research explores how a change in a restaurant’s ambient brightness influences the overall taste intensity perception of the food that is being served there. We conducted a between-group experiment in a field setting (i.e., a fine-dining restaurant), where we manipulated the illuminance level of the ambient light (dim vs. bright). Guests were served a dish—tailored to our research question—and asked to evaluate its overall taste intensity. The results demonstrate that guests exposed to the bright ambient light perceived the overall taste of the dish as more intense as opposed to guests exposed to the dim ambient light. The results thus show that modifying the ambient illuminance level in a restaurant does not only affect the overall ambience but also changes the overall taste experience of the food being served. This finding is not only theoretically relevant for research on multisensory integration, but it also provides tools for taste modulation, and—as such—for strategies to decrease salt and sugar consumption among diners.     

二氧化硫脲在OCC浆料轻度漂白中的应用研究

使用二氧化硫脲对旧瓦楞纸箱（OCC）浆料进行了轻度漂白;探讨了二氧化硫脲的用量、EDTA的用量、温度、浆料浓度及反应时间对漂白效果的影响。生产实践表明,二氧化硫脲对提高OCC浆料亮度具有较好的效果,是一种有效且极具竞争力的漂白剂。     

含臭氧漂段的硫酸盐苇浆TCF漂白

本实验主要研究了硫酸盐苇浆含臭氧漂段的TCF漂白工艺。首先通过一系列预处理，解决了臭氧漂白中粘度损失严重的问题。通过草酸预处理后，在35％浆浓，0．5％的臭氧用量下，臭氧漂白的粘度损失从18．9％降到了7．37％，并且草酸预处理还有很好的提高白度的效果。其后的过氧化氢漂白，在H2O2用量1．5％，NaOH用量0．8％，NaSi03用量1．5％，MgSO4用量0．1％，90℃，90min的处理条件下，就能达到白度88．8％SBD，黏度785ml／g的理想效果。