In the ternary color system of 2,6,7-trihy-dro salicylfluorone-Ge( Ⅳ )-OP containing 0. 72 mol/L H2SO4 and 3. 0 mol/L H3PO4, the molar responsive coefficient of the 4th-derivative spectrum by compressing X-factor is 1. 89 × 105 L · mol-1· cm-1 (12. 4 times as high as );
In 2001,CIE recommend a new color difference formula CIEDE2000. In this experiment, CIE 1976 L*a*b*,CMC and CIEDE2000 color difference formulae are checked and compared making use of thecharacteristic of Munsell color system, which its samples nearby are of equal perceived color differenceand the Munsell hue, chroma and value can be changed independently.
Methods In the same condition,CIE1976L*a*b* color system,a digital camera,computer and a standard light source were selected to measure and compare the characteristics of A2 shade slice in the shade guide and three types of metal ceramic restorations.
CIE_(1976) L~*a~*b~* color system and a digital camera and computer were selected to measure and compare characteristic of VITA shade guide and three types of metal ceramic restorations and those of repeated firings.
This results have been compared with Swedish Natural Colour Order System (NCS) , Deutsche Industire Normung (DIN 6164 color system) ,Optical Society of America U-niform Colour Scales (OSA-UCS) and Japanese Colour Order Systems (C. C. 5000).
Comparing the results of chromatic color with the achromatic color, it was found that the values of △E of various sensation level of chromatic color system were higher than that of the values of △E of achromatic color system.
Making use of the characteristic of the Chinese color system, which its samples nearby are of equal perceived color difference and the Chinese color system hue, chroma and value can be changed independently. Making research on CIEL*a*b*、CMC(l:c)、CIE94、CIEDE2000 color difference formulae by value、hue and chroma separately.
By expounding the reform of concept and material, the article elaborate that traditional Chinese Painting needs new painting language for its development. Therefore it is inevitable to apply the new color concept and artistic language of modern western art as a reference so to enrich the color language of traditional Chinese painting for restructuring the color system of modern Chinese landscape painting.
In the aspect of color, with the visual recognition of ink in paper, the unique Chinese inkpainting color system, and the western color presentation, it will discuss the composition of picture by using the relationship of cold and warm color, and extend multiple meaning of the color problem of taking white as black.
The Lab space color system parameters of micro-aggregate such as cement,fly ash,slag powder can be tested by color difference method. All the parameters are the referene for chroma evaluation and controllong of cement and micro-aggregate.
We obtained the tristimulus values of X, Y, and Z of the 10° standard observer under the illuminant of D65, and the values of the CIELAB color system, L*, a*, b*, C*, and h.
In contrast, our approach, which uses the YIQ color system with a background estimation method for skin color extraction, achieved a good performance more than 30 fps, with strong robustness in complicated and poorly illuminated environments.
Further, the color system, consisting of red ([A1L2]-), yellow (H2L), and blue violet (CV+), gave clear color changes suitable for visual determination of aluminum with an applicable range of 0 to above 3000 ng/ml.
An easy-to-use nomogram for whiteness determination was developed, based on the CIE 1931 2°-color system.
He started from Aristotle's linear color system and Goethe's three pairs of contrast colors.