241201 1L2L0X0H_K2710.KTS/YExlHIN.KTS http://color.li.tu-berlin.de/hexs.htm or http://farbe.li.tu-berlin.de/hexs.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 hexs in English, hgxs in German.
For the previous image page, see hews in English, hgws in German.
For the next image page, see heys in English, hgys 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 hexs

Title: Colour metrics for light and colour as function of the relative luminance L/Lu (Lu=surround luminance)
Experimental data and model functions Q/Fab(xr).
1. Introduction and goals.
2. Experimental data from a book for xr=log(L/Lu);
3. Response functions Q/Fab[e^(xr/a) or 10^(xr/a')] with a'=a ln(10).
4. Deviations of the response functions for luminance discrimination.
5. Antichromatic models of colour vision.
6. Receptor sensitivity for achromatic colours.
7. Logarithmic and linear models for combinations of the sensitivities.
for further information and discussion, see DEAI.

The following ten pages hex0 to hex9 of this chapter
show the content with links to the single figures in up to six formats.


Figure hex0l0n1.jpg: Output in format A6 of the file hex0l0np.pdf, see
hex0l0n1. ps / txt / pdf / jpg

hex0: TUB-test chart hex0; Threshold experiments
Description of the experimental threshold delta Y
Formulae for the description of the lightness F*(Y)



Figure hex1l0n1.jpg: Output in format A6 of the file hex1l0np.pdf, see
hex1l0n1. ps / txt / pdf / jpg

hex1: TUB-test chart hex1; CIE Y an lightness L*
for surface colours and emissive displays
Chromaticity and chromatic values of Ostwald- colours



Figure hex2l0n1.jpg: Output in format A6 of the file hex2l0np.pdf, see
hex2l0n1. ps / txt / pdf / jpg

hex2: TUB-test chart hex2; Comparison of Qab(xr) and Fab(xr)
Line elements as integral an derivation
tanh(xr) mit e^(xr/a) und 10^(xr/a')



Figure hex3l0n1.jpg: Output in format A6 of the file hex3l0np.pdf, see
hex3l0n1. ps / txt / pdf / jpg

hex3: TUB-test chart hex3; 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 hex4l0n1.jpg: Output in format A6 of the file hex4l0np.pdf, see
hex4l0n1. ps / txt / pdf / jpg

hex4: TUB-test chart hex4; Fab(xr)-model for visual responses
Application of hyperbel function tanh on receptor responses
Presentation of the functions and derivation for discrimination



Figure hex5l0n1.jpg: Output in format A6 of the file hex5l0np.pdf, see
hex5l0n1. ps / txt / pdf / jpg

hex5: TUB-test chart hex5; Fab(xr)-model for visual responses
derivation of the responses; tanh(xr) with e^xr/a and 10^xr/a'
a'=a ln(10); a^n = a^0,7; 4 x 4 images



Figure hex6l0n1.jpg: Output in format A6 of the file hex6l0np.pdf, see
hex6l0n1. ps / txt / pdf / jpg

hex6: TUB-test chart hex6; Fab(xr)-model for visual responses
derivation of the responses; tanh(xr) with e^xr/a and 10^xr/a'
a'=a ln(10); a^n = a^0,5; 4 x 4 images



Figure hex7l0n1.jpg: Output in format A6 of the file hex7l0np.pdf, see
hex7l0n1. ps / txt / pdf / jpg

hex7: TUB-test chart hex7; Fab(xr)-model for visual responses
derivation of the responses; tanh(xr) with e^xr/a and 10^xr/a'
a'=a ln(10); a^n = a^1,0; 4 x 4 images



Figure hex8l0n1.jpg: Output in format A6 of the file hex8l0np.pdf, see
hex8l0n1. ps / txt / pdf / jpg

hex8: TUB-test chart hex8; Fab(xr)-model for visual responses
derivation of the responses; tanh(xr) with e^xr/a and 10^xr/a'
a'=a ln(10); a^n = a^0,7; 4 x 4 images



Figure hex9l0n1.jpg: Output in format A6 of the file hex9l0np.pdf, see
hex9l0n1. ps / txt / pdf / jpg

hex9: TUB-test chart hex9; Fab(xr)-model for visual responses
derivation of the responses; tanh(xr) with e^xr/a and 10^xr/a'
a'=a ln(10); a^n = a^0,5; 4 x 4 images

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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.