A Novel Color Recognition Model for Improvement on Color Differences in Products via Grey Relational Grade

Abstract

ED light, a green energy-saving light source, can cause color cast. For this reason, LED light is seldom favored by designers. The purpose of the paper is to provide shoppers who are observing product colors in an LED-lighted setting with an innovative color identification model. Based on designers’ product color comparison, the paper employs high-reliability mechanic visual perception in combination with grey relational grade. Grey relational grade is applied to eliminate electrical fault pertaining to mechanic visual perception, whereby appropriate LED parameters and color cast inclination can be obtained. The paper first mimics retail store display windows. The color temperature and illuminance of LED light sources are adjustable. Two degrees of illuminance, including high illuminance (1500 lux) and low illuminance (500 lux), and two light source color temperatures, including yellow light (2700 K) and white light (4000 K), were assigned for study. Four colors, including red, yellow, blue and green of the natural color system, were selected as product colors. The mechanic visual perception sensor was used to identify the object (product) color, which is then converted into an RGB color model to serve as research data of color cast measurement, and the grey relational grade was applied to obtain the most appropriate LED light parameters and the color cast of the four colors. The data analysis reveals that green shows the least color cast when it is lighted by a yellow LED light source with low illuminance, yellow and blue have the least color cast when it is lighted by a white LED light source with high illuminance and red displays the least color cast when it is lighted by a white LED light source with low-illuminance. The analysis also indicates each color’s cast inclination in blackness, chromaticness and hue. As a result, LED light that is more acceptable to designers is suggested for display windows, thus reducing problems with product color cast.

The Effect of Munsell Neutral Value Scale on the Color of Yellow Jadeite and Comparison between AP and K-Means Clustering Color Grading Schemes

“…An X-Rite SP62 spectrophotometer (X-Rite, Grand Rapids, MI, USA) was used to collect reflective signals from the yellow jadeite surface via the integrating sphere (Figure 2). The test conditions can be summarized as follows: CIE standard illumination, D65; illuminance of the test height, 1500 lux (based on the China national standard GB/T 26189-2010 "Lighting of Indoor Workplaces" (It is also believed that high illuminance would help lower color cast of yellow [12], tested by Konica Minolta CL-200 Color Illuminometer)); reflection, Specular Excluded; observer view, 2 • ; measurement range, 400-700 nm; measurement time, less than 2.5 s; voltage, 220 V; frequency, 50-60 Hz. The final color data were averaged three times for testing.…”

“…The physical source and chemical analysis of the secondary color is not the only topic for investigation. The color itself can be affected by the objective circumstance, including the properties of the background [9,10], the illuminance [11,12], and the temperature of the light source [13][14][15][16][17][18]. The yellow jadeite can be a gradual series that is worthwhile in the study of colorimetry.…”

A Comparison of Two Different Light Booths for Measuring Color Difference of Metameric Pairs

“…A studied revealed that the luminance level in several light booths varied from 100 to >1000 cd/m 2 [11]. There are studies that show how correlated color temperature and illuminance affect color perception [12][13][14][15] and users' feeling [16][17][18][19].…”