BACKGROUND/PURPOSE In this work, we present a new and fast easy-to-use device that allows the measurement of color and the detection of spots on the human skin. The developed device is highly practical for relatively untrained operators and uses inexpensive consumer equipment, such as a CCD color camera, a light source composed of LEDs and a laptop. The knowledge of the color of the skin and th...

In recent years, various color difference formulas were developed for the CIELAB space, such as CMC, CIE94 and CIEDE2000. Although these formulas have achieved greater accuracy in perceptual measurement between colors, many applications cannot take advantage of this greater precision, because the Euclidean distances in CIELAB are not isometric in accordance with these new formulas. Thus, applic...

The world of color image difference modeling can be considered relatively young, when compared with the rich history of general color difference equations. While young, this area of research is well beyond the primordial soup stage. In this paper we present a framework for describing the evolution of color image difference models. This framework builds upon the S-CIELAB model, which in turn was...

A color visual difference model (CVDM) was developed to predict the image quality difference of two images. The model is an extension of the two previously published models: The monochromatic Visible Difference Predictor (VDP) by Scott Daly and the color Spatial-CIELAB (SCIELAB) model by Zhang et al. The CVDM consists of color space conversion, modulation by contrast sensitivity functions, visu...

The CMC, BFD, and CIE94 color-difference formulas have been compared throughout their weighting functions to the CIELAB components DL*, DC*, DH*, and from their performance with respect to several wide datasets from old and recent literature. Predicting the magnitude of perceived color differences, a statistically significant improvement upon CIELAB should be recognized for these three formulas...

CIELAB is commonly used in design as it provides a simple method for approximating color difference. However, these approximations model color perception under laboratory conditions, with correctly calibrated displays and carefully constrained viewing environments that are not reflective of complexity of viewing conditions encountered in the real world. In this paper, we present a data-driven e...

Abstract The kinetics of heat-induced color changes in beef meat was determined and implemented a numerical model for double-sided pan cooking steak. CIELab space used to obtain the lightness (coordinate $$L^*$$ L ∗ ) reddish tone $$a^*$$ a cooked meat....

Color constancy is something we take for granted. An apple appears red despite monumental changes in the intensity and spectral balance of illumination. There are many components to human visual system that make this illusion possible. Nonetheless, imperfect. Objects will change apparent color under different The CIELAB space allows computation values any illuminant. will, general, as illuminan...