Make women more beautiful skin index
Look at the title a bit hanging, but the ladies must be very curious, face-lifting self-timer can be sought after, the skin index is certainly not bad. What is the skin index? The skin index was first proposed by Matsushita of Japan. It is a numerical language to judge the beauty of Japanese women's skin color under artificial light. The English is Perference Index of Skincolor, referred to as PS. China's Fudan University will further study PS theory according to the skin color of women in China, and PS is also suitable for women in China. Further reasoning, PS applies to East Asian yellow women.
In principle, the closer the PS is to 100, the more beautiful the skin color is. The chromaticity point of the beautiful skin color on the CIE1976 chromaticity diagram is (u', v') = (0.2425, 0.4895). Below the standard light source D65 light, the closer to the chromaticity point, the closer the PS value is to 100, as shown in FIG.
Figure 1 PS value and skin evaluation
1 - the color is evaluated as "very beautiful"; 2 - the color is evaluated as "beautiful"; 3 - the color is evaluated as "slightly beautiful"
Seeing this, the beautiful women are eager to take pictures in the light environment of 1 in Figure 1. After that, I am going to invent the self-timer flash of the mobile phone. The light meets the above requirements and must be sold very well! However, there is a certain individual difference in the cognition of "beauty". The so-called benevolent sees the wise and sees wisdom, with obvious subjectivity. The Panasonic company tested Japanese female respondents aged 20 to 49. After testing and evaluation, the PS was 95. About 80% of the respondents thought that the tester's skin color was very beautiful.
Figure 2 skin ratio and PS value
In the future, the lighting designer must design the beauty salon, the hair salon, the cosmetics counter, the jewelry monopoly, etc., and must carefully study the PS and select the appropriate PS value.
a contrast index that makes women's skin more delicious
The skin index PS was introduced in the previous section - making East Asian women more beautiful in the light! The article was popular with female friends, but male friends seem to be not interested. In fact, it looks more beautiful under the illumination, not only the PS indicator, but also the results of several other parameters.
The contrast index FCI (abbreviation of Feeling of Co ntrast Index) is another important skin lighting parameter, which is also an indicator developed by Panasonic Corporation of Japan. It can be seen that Japan is indeed unique in the basic research and practical application of lighting. The FCI indicator is an index that quantifies the "degree of contrast" and "degree of vividness" of colors under artificial light sources. When FCI = 100, the contrast feeling of the same degree as the reference light (D65) prescribed by the CIE can be obtained. However, the specific algorithm of FCI is not known at present, and there is no specific requirement. The FCI of different light sources is different. The FCI of incandescent lamps is 123, the FCI of ordinary fluorescent lamps is 114, and the FCI of Panasonic LEDs is 124.
Experiments have shown that the increase in FCI increases the degree of contrast and vividness. As shown in the figure, FCI=120 light source can obtain 120μ100=1.2 times illumination effect with FCI=100 light source, that is, in the case of the same illumination, the items are more vivid and women are more beautiful!
Three elements of skin care lighting
The first two parts respectively introduce the important indicators of skin care - skin index PS, contrast index FCI, but these two indicators are not enough, our well-known color rendering index is also an important indicator of skin light, color rendering index includes general Color rendering index and special color rendering index. Regarding the color rendering index, I have already described and explained the article earlier, please read it yourself.
Studies have shown that the three elements of skin care are: color rendering index, skin index and contrast index. Combining the articles pushed in the previous two periods, the skin index PS=95, the contrast index FCI=134, the general color rendering index Ra=95 and the better special color rendering index (refer to Table 1), with these three lighting indicators Under the illumination of the light source, the skin color of East Asian women will be more beautiful and beautiful, and the products will be bright. Based on the above principles, Panasonic has developed a beautiful LED product that can meet the lighting needs of specific locations. I believe that more units will invest in the research and development of such products. In the lighting design of cosmetics, high-end jewelry, high-end clothing and other special cabinets (shops), the light source that meets the above-mentioned indicators can achieve an unexpectedly brilliant effect.
This product uses a special chip to adjust the wavelength distribution of 570nm~580nm in the spectrum through spectral control technology, and improve three important indicators in the spectrum to determine the degree of beauty, as shown in Figure 1.
Figure 1 Comparison of the spectrum of the beautiful color LED with the spectrum of the ordinary LED
Based on the general color rendering index Ra=95, the beautiful color LED improves and improves the special color rendering index, as shown in Table 1. Therefore, the beautiful color LED can perfectly display the true color of the product.
Table 1 General color rendering index and special color rendering index of the beautiful color LED
Figure 2 Comparison of commodity effects (right: ordinary LED lights; left: beautiful light LED lights)
However, the skin of the skin has to pay a price, and its light effect will be reduced to a certain extent, and the reduction is generally 10% to 30%. Therefore, in the use of beauty skin lighting products, it is necessary to comprehensively consider various factors and targeted use.
Monitor Stand For Computer Screens
Shenzhen ChengRong Technology Co.,Ltd. , https://www.nblaptopstandsupplier.com