Bandwidth correction for LED chromaticity

The spectral bandwidth formulae of Stearns and Stearns   are generalized for an arbitrary slit function. Correction coefficients are derived in terms of moments of the slit function. Application to model LED spectra measured with a compact, fiber‐coupled spectrometer having bandwidth of order 12 nm, and a nonlinear wavelength scale shows that accurate LED color measurements may be obtained with such an instrument. Fitting of the relatively broad slit function to line spectra for accurate wavelength calibration is also described. Such fitting, coupled consistently with the bandpass correction, improves the accuracy color measurements with a broad‐response spectrometer. © 2006 Wiley Periodicals, Inc. Col Res Appl, 31, 374–380, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.20242     

建筑涂料电脑调色系统的建立

分别从市场及技术方面讨论了建立电脑调色系统的主要程序、方法和技术要求等,讨论了建立调色系统所需的主要设备和仪器。     

用添加剂改善柴油的颜色稳定性

利用实验室筛选出的一种柴油安定性改进剂改善柴油的颜色稳定性。贮存实验表明：成品柴油(催化裂化柴油组分占30％)中加入该剂300～400μg/g，可改善比色0．5-1．5个号，同时可抑制柴油氧化沉渣的生成，改善柴油的氧化安定性和颜色稳定性。     

VB中使用API函数操作屏幕分辨率和色彩度

介绍在VB6.0中如何使用API函数和自定义函数实现屏幕分辨率和色彩度的获取和更改。     

Differences in color naming and color salience in Vietnamese and English

The accepted model of color naming postulates that 11 “basic” color terms representing 11 common perceptual experiences show increased processing salience due to a theorized linkage between perception, visual neurophysiology, and cognition. We tested this theory, originally proposed by Berlin and Kay in 1969. Experiment 1 tested salience by comparing unconstrained color naming across two languages, English and Vietnamese. Results were compared with previous research by Berlin and Kay, Boynton and Olson, and colleagues. Experiment 2 validated our stimuli by comparing OSA, Munsell, and newly rendered “basic” exemplars using colorimetry and behavioral measures. Our results show that the relationship between the visual and verbal domains is more complex than current theory acknowledges. An interpoint distance model of color‐naming behavior is proposed as an alternative perspective on color‐naming universality and color‐category structure. © 2003 Wiley Periodicals, Inc. Col Res Appl, 28, 113–138, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.10131     

合成十二烷基葡萄糖苷的工艺条件

采用对甲苯磺酸为催化剂 ,以D 葡萄糖和正十二醇为原料直接合成十二烷基糖苷 ,研究了工艺条件对反应速率、产物收率与色泽的影响。结果表明 ,催化剂用量对产物色泽无影响 ,适宜的工艺条件为 :正十二醇 /D 葡萄糖 (摩尔比 ) =4∶1,反应温度 110～ 12 0℃ ,反应时间 4h ,反应压力 4kPa ,搅拌速率大于 840r/min ,对甲苯磺酸 /D 葡萄糖 (摩尔比 ) =1.5 %,MgO为较好的中和剂。产物为乳白色 ,十二烷基糖苷总收率大于89%。     

图片彩色参数数字滤波设计

颜色和形状信息是识别物体的重要信息．本文提出用数字滤波器将图象空间分割为H包含M和M/H空间的一种方法．该方法进一步将分析彩色图象为众所周知的测量分割部分几何特征的算法，包括通过节点的阶数确定分割部分的分布及动态特征，包括速度和移动方向的分布等．     

Wood inspection with non-supervised clustering

Abstract. The appearance of sawn timber has huge natural variations that the human inspector easily compensates for mentally when determining the types of defects and the grade of each board. However, for automatic wood inspection systems these variations are a major source for complication. This makes it difficult to use textbook methodologies for visual inspection. These methodologies generally aim at systems that are trained in a supervised manner with samples of defects and good material, but selecting and labeling the samples is an error-prone process that limits the accuracy that can be achieved. We present a non-supervised clustering-based approach for detecting and recognizing defects in lumber boards. A key idea is to employ a self-organizing map (SOM) for discriminating between sound wood and defects. Human involvement needed for training is minimal. The approach has been tested with color images of lumber boards, and the achieved false detection and error escape rates are low. The approach also provides a self-intuitive visual user interface. Received: 16 December 2000 / Accepted: 8 December 2001 Correspondence to: O. Silvén     

Physicochemical and Sensory Properties of Soymilk-incorporated Bulgur

ABSTRACT Bulgur cooked in soymilk of 6% and 9% solid content had significantly ( P < 0.05) higher bulk density compared with bulgur cooked in soymilk of 3% solid content and control bulgur cooked in water. As the soymilk solid content increased, pilav bulgur yield increased whereas fine bulgur yield decreased. The SDS-extractability of bulgur proteins increases with the increase in soymilk solid content. Water absorption capacity of fine bulgur samples was affected by soymilk incorporation, and variations in oil absorption capacity were not significant ( P > 0.05). Soymilk incorporation improved color and sensory properties of pilav and fine bulgur. The results of this study suggest that soymilk can be successfully applied to bulgur production.     

彩色感光材料冲洗中隐青的产生及解决办法

在彩色感光材料冲洗过程中，经过彩色显影液处理的感光药膜中，同时生成黄、品红、青三种颜色的染料，但实际上由于青染料隐色体的电位比黄和品红染料隐色体的电位高，醌二亚胺阳离子没有足够的能力将其氧化，因此在彩色显影液中生成的是青染料的隐色体，只有在进入漂白液以后，才能形成真正的青色染料，如果由于某种原因，使得这种转变不能全部完成，就会有一部分青染料的隐色体存留在影像的青色部分，形成隐青，直接影响彩色影像的质量。本文系统地阐述了隐青的危害、产生的原因和解决的办法。