𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A colorimetric explanation of the Helmholtz–Kohlrausch effect

✍ Scribed by Yoshinobu Nayatani

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
83 KB
Volume
23
Category
Article
ISSN
0361-2317

No coin nor oath required. For personal study only.

✦ Synopsis

The Helmholtz-Kohlrausch effect is related with the chromatic strengths of spectral colors suggested by R. M.

Evans. An estimate of the chromatic strengths of spectral colors is given by using the color-matching functions and their combinations. The estimate of the chromatic strength corresponds to "chromaticness per unit luminance" at each spectral color. The derived chromatic-strength function is very similar to the Helmholtz-Kohlrausch effect and the zero-grayness function by Evans for spectral colors.

📜 SIMILAR VOLUMES

Simple estimation methods for the Helmho
Simple estimation methods for the Helmholtz—Kohlrausch effect
✍ Yoshinobu Nayatani 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 178 KB 👁 2 views

## Four kinds of simple estimation equations are The phenomena are well-known and are identified with the Helmholtz-Kohlrausch effect (abbreviated as the H-proposed for the Helmholtz-Kohlrausch effect. Two of them can be used for luminous colors, and the other two K effect hereafter). A large numb

Relations between the two kinds of repre
Relations between the two kinds of representation methods in the Helmholtz-Kohlrausch effect
✍ Yoshinobu Nayatani 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 204 KB 👁 2 views

There are two kinds of representation methods ness as the test light. The quantity L\* is the metric of the Helmholtz-Kohlrausch effect; one is the Variablelightness of test chromatic object color, and L\* N is its Achromatic-Color method, and the other the Variableequivalent lightness or the metric

Clarification of differences between var
Clarification of differences between variable achromatic color and variable chromatic color methods in the Helmholtz–Kohlrausch effect
✍ Yoshinobu Nayatani; Hideki Sakai 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 332 KB

## Abstract The Helmholtz–Kohlrausch effect consists of two different approaches: the variable achromatic color (VAC) and variable chromatic color (VCC) methods. In this article the difficult conceptual difference between the methods is clarified using new explanations with their schematic figures.