260723 1L2L0X0K_K2710.KTS/YELINKIN.KTS http://color.li.tu-berlin.de/keas.htm or http://farbe.li.tu-berlin.de/keas.htm

260327 YELINKIN.KTS
For links to the Section 2, Chapter K Visual experimental data for scaling and thresholds (2026b) , under work, see
For this image page with 10 colour series, see keas in English, kgas in German.
For the previous image page, see kezs in English, kgzs in German.
For the next image page, see kebs in English, kgbs in German.
For the first image page of the previous chapter J (2026), see jeas in English, jgas in German.
For the first image page of the next chapter L (under work, 2027), see leas in English, lgas in German.

Content list of chapter K (2026b): kea_i in English or kga_i in German.
Up to now no summary of chapter k is available, see publications XY91FEN in English or XY91FDE in German.
For the large image page of chapter K with 260 colour series, see ke2s in English or kg2s in German.
For the same content as pdf file (attention about 100 MB, 260 pages), see ke2s.pdf in English or kg2s.pdf in German.

Section 2, Chapter K
Visual experimental data for scaling and thresholds (2026b),
under work, Image part keas

Title: Application of software for an improved visual inductive and deductive colorimetry;
Use of free software Output Linearisation (ol), Threshold (th),
GammaAdjuster (ga), and in addition GraphicConverter (cc) on Mac OS;
Visual results define an improved colourimetry for 9 step colour series;
Equal spacing and regularity according to ISO/CIE 11664-4 (CIELAB),
IEC 61966-2-1 (sRGB), ISO 9241-306:2018 and ISO/IEC 15775:2022;
Optimisation of output quality by the ISO-regularity index for the 9 step grey scale;
Comparison of the colour-difference formulae CIELAB, LABJND (CIE 230:2019),
IECsRGB, TUBsRGB, and TUBLOG normalized to mean grey U or white W
CIELAB, CIEDE2000, and LABJND (CIE 230:2019)
1. Introduction and goals.
2. Inductive and deductive colourimetry.
3. Visual results with the help of software define an inductive colourimetry.
4. A deductive colourimetry allows to calculate the visual results.
5. Use of 9 step colour series according to ISO 9241-306:2018 and ISO/IEC 15775:2022.
6. Equal colour differences according to CIELAB and equal
digital rgb-differences according to IEC 61966-2-1 (sRGB).
7. Further properties by use of combinations of the application programs.
8. Enhancement of the output quality by a gamma change depending on display
reflection of ambient light and stray light in the eye media of the observer.
9. Description of lightness L*, threshold delta_Y, sensitivity Y/delta_Y,
and contrast Y/delta_Y as function of CIE tristimulus value log(Y) or luminance log(L).
10. Contrary ouput quality with the index regularity according to ISO 15775,
and an ISO index minimal colour difference in the printing area.

The following ten pages kea0 to kea9 of this chapter
show the content with links to the single figures in up to six formats.


Figure kea0l0n1.jpg: Output in format A6 of the file kea0l0np.pdf, see
kea0l0n1. ps / txt / pdf / jpg

kea0: TUB-test chart kea0; Colour loop and output linearisation
equally spaced (regular) output of colour series
Thirteen 9 step colour scales as function of gamma_rel,U



Figure kea1l0n1.jpg: Output in format A6 of the file kea1l0np.pdf, see
kea1l0n1. ps / txt / pdf / jpg

kea1: TUB-test chart kea1; Structure, content and image examples
of the web side https://farbe.li.tu-berlin.de/index.html
of the Technical University Berlin (TUB)



Figure kea2l0n1.jpg: Output in format A6 of the file kea2l0np.pdf, see
kea2l0n1. ps / txt / pdf / jpg

kea2: TUB-test chart kea2; Farbmetric scaling SDR & HDR
between peak white P2 and peak black p2 according to
CIELABw, IECsRGBw, and TUBLOGu for the contrast 25:1



Figure kea3l0n1.jpg: Output in format A6 of the file kea3l0np.pdf, see
kea3l0n1. ps / txt / pdf / jpg

kea3: TUB-test chart kea3; Farbmetric scaling SDR & HDR
between peak white P2 and peak black p2 according to
CIELABu, IECsRGBu, TUBLOGu und TUBsTGBu for the contrast 25:1



Figure kea4l0n1.jpg: Output in format A6 of the file kea4l0np.pdf, see
kea4l0n1. ps / txt / pdf / jpg

kea4: TUB-test chart kea4; Scaling functions of achromatic colours
Description for surrounds W, U, N with three gamma values
Cescription with relative (r) CIELABr, IECsRGBr, and TUBLABr



Figure kea5l0n1.jpg: Output in format A6 of the file kea5l0np.pdf, see
kea5l0n1. ps / txt / pdf / jpg

kea5: TUB-test chart kea5; Scaling functions of chromatic colours
Description for surrounds W, U, N with three gamma values
Cescription with relative (r) CIELABr, IECsRGBr, and TUBLABr



Figure kea6l0n1.jpg: Output in format A6 of the file kea6l0np.pdf, see
kea6l0n1. ps / txt / pdf / jpg

kea6: TUB-test chart kea6; Relative (r) LABJNDr colour-
difference formula, see CIE 230:2019, log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure kea7l0n1.jpg: Output in format A6 of the file kea7l0np.pdf, see
kea7l0n1. ps / txt / pdf / jpg

kea7: TUB-test chart kea7; Relative (r) CIELABr colour-
difference formula, see ISO/CIE 11664-4, log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure kea8l0n1.jpg: Output in format A6 of the file kea8l0np.pdf, see
kea8l0n1. ps / txt / pdf / jpg

kea8: TUB-test chart kea8; Relative (r) LABJNDr colour-
difference formula, see CIE 230:2019, linear[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure kea9l0n1.jpg: Output in format A6 of the file kea9l0np.pdf, see
kea9l0n1. ps / txt / pdf / jpg

kea9: TUB-test chart kea9; Relative (r) CIELABr colour-
difference formula, see ISO/CIE 11664-4, linear[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]

-------
For the archive information (2000-2009) of the BAM server "www.ps.bam.de" (2000-2018)
about colour test charts, colorimetric calculations, standards, and publications, see
indexAE.html in English, indexAG.html in German.

Back to the main page of this TUB web site (NOT archive), see index.html in English, indexDE.html in German.