241201 1L2L0X0H_K2710.KTS/YEblHIN.KTS http://color.li.tu-berlin.de/hebs.htm or http://farbe.li.tu-berlin.de/hebs.htm

For links to the Section 2, Chapter H SDR and HDR-colour metric for optimal colour-image quality (2025) , under work, see
For this image page with 10 colour series, see hebs in English, hgbs in German.
For the previous image page, see heas in English, hgas in German.
For the next image page, see hecs in English, hgcs in German.
For the first image page of the previous chapter G, see geas in English, ggas in German.
For the first image page of the next chapter I (under work), see ieas in English, igas in German.

Content list of chapter H (under work): hea_i in English or hga_i in German.
Summary of chapter H: hea_s in English or hga_s in German.
For the large image page of chapter H with 260 colour series, see he2s in English or hg2s in German.

Section 2, Chapter H
SDR and HDR-colour metric for optimal colour-image quality (2025), Image part hebs

Title: Colour metrics according to the Fab(xr) and Qab(xr) models of colour vision
Special colourimetric properties of colour-image technology
Comparison of colour difference formulae CIELAB, CIEDE2000 and LABJND
1. Introduction and goals.
2. Colour metrics according to the Fab(xr) and Qab(xr) models of colour vision;
3. Special colourimetric properties of colour-image technology;
4. Comparison of colour difference formulae CIELAB, CIEDE2000 and LABJND according to CIE 230:2019;
5. Application and discussion.

The following ten pages heb0 to heb9 of this chapter
show the content with links to the single figures in up to six formats.


Figure heb0l0n1.jpg: Output in format A6 of the file heb0l0np.pdf, see
heb0l0n1. ps / txt / pdf / jpg

heb0: TUB-test chart heb0; Q/Fab(xr)-models for visual responses
Q/Fab(xr) with hyperbel functions e^(xr/a) and 10^(xr/a')
with contants a'=a ln(10) and a^n = a^1,0



Figure heb1l0n1.jpg: Output in format A6 of the file heb1l0np.pdf, see
heb1l0n1. ps / txt / pdf / jpg

heb1: TUB-test chart heb1; Fab(xr)-model for visual responses
Application of hyperbel function tanh on receptor responses
Presentation of the functions and derivation for discrimination



Figure heb2l0n1.jpg: Output in format A6 of the file heb2l0np.pdf, see
heb2l0n1. ps / txt / pdf / jpg

heb2: TUB-test chart heb2; Q/Fab(xr)-models for visual responses
Q/Fab(xr) with hyperbel functions e^(xr/a) and 10^(xr/a')
with contants a'=a ln(10) and a^n = a^1,0



Figure heb3l0n1.jpg: Output in format A6 of the file heb3l0np.pdf, see
heb3l0n1. ps / txt / pdf / jpg

heb3: TUB-test chart heb3; Special colourimetric properties
of colour vision and image technology; Comparison of CIELAB and
IECsRGB: triangle lightness, contrast and sensitivity



Figure heb4l0n1.jpg: Output in format A6 of the file heb4l0np.pdf, see
heb4l0n1. ps / txt / pdf / jpg

heb4: TUB-test chart heb4; Comparison of the CIELAB and
the CIEDE2000 colour difference formula; log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure heb5l0n1.jpg: Output in format A6 of the file heb5l0np.pdf, see
heb5l0n1. ps / txt / pdf / jpg

heb5: TUB-test chart heb5; Comparison of the CIELAB and
the CIEDE2000 colour difference formula; log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure heb6l0n1.jpg: Output in format A6 of the file heb6l0np.pdf, see
heb6l0n1. ps / txt / pdf / jpg

heb6: TUB-test chart heb6; Calculations for the CIELAB colour-
difference formula, see ISO/CIE 11664-4, log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure heb7l0n1.jpg: Output in format A6 of the file heb7l0np.pdf, see
heb7l0n1. ps / txt / pdf / jpg

heb7: TUB-test chart heb7; Calculations for the LABJND colour-
difference formula, see CIE 230:2019, log[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure heb8l0n1.jpg: Output in format A6 of the file heb8l0np.pdf, see
heb8l0n1. ps / txt / pdf / jpg

heb8: TUB-test chart heb8; Calculations for the CIELAB colour-
difference formula, see ISO/CIE 11664-4, linear[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure heb9l0n1.jpg: Output in format A6 of the file heb9l0np.pdf, see
heb9l0n1. ps / txt / pdf / jpg

heb9: TUB-test chart heb9; Calculations for the LABJND colour-
difference formula, see CIE 230:2019, linear[lightness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]

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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.