241201 1L2L0X0H_K2710.KTS/YEvlHIN.KTS http://color.li.tu-berlin.de/hevs.htm or http://farbe.li.tu-berlin.de/hevs.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 hevs in English, hgvs in German.
For the previous image page, see heus in English, hgus in German.
For the next image page, see hews in English, hgws 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 hevs

Title: TUBJND colour vison model: Receptor-response functions Fab(xr)
and derivations F'ab(xr) for different parameters a,b;
Calculations and plots for the colour-difference formula HAULAB
for four adaptation luminances and four viewing angles
1. Introduction and goals.
2. TUBJND colour vison model: receptor-response functions Fab
and derivations F'ab for different parameters a,b.
3. Antagonistic functions Fab and F'ab without a shift.
4. Calculations with the colour-difference formula HAULAB 1980
for 4 adaptation luminances L=300, 1000, 200, 40 cd/m^2
and 4 viewing angles phi=120', 60', 30', 20'/10'.
5. Calculation of log and lin [lightness L*, threshold delta_Y,
sensitivity delta_Y/Y, contrast Y/delta_Y].
6. Application and discussion.

The following ten pages hev0 to hev9 of this chapter
show the content with links to the single figures in up to six formats.


Figure hev0l0n1.jpg: Output in format A6 of the file hev0l0np.pdf, see
hev0l0n1. ps / txt / pdf / jpg

hev0: TUB-test chart hev0; TUBJND model with functions Fab, F'ab
Receptor responses R+, G-, Y+ (left & right), and derivations
R+', G-' (right) for diferent parameters a,b



Figure hev1l0n1.jpg: Output in format A6 of the file hev1l0np.pdf, see
hev1l0n1. ps / txt / pdf / jpg

hev1: TUB-test chart hev1; TUBJND model with functions Fab, F'ab
Receptor responses R+, G-, Y+ (left & right), and derivations
Y+', Y-' (left & right), and R+'/G-' (right) for a,b



Figure hev2l0n1.jpg: Output in format A6 of the file hev2l0np.pdf, see
hev2l0n1. ps / txt / pdf / jpg

hev2: TUB-test chart hev2; 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 hev3l0n1.jpg: Output in format A6 of the file hev3l0np.pdf, see
hev3l0n1. ps / txt / pdf / jpg

hev3: TUB-test chart hev3; 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 hev4l0n1.jpg: Output in format A6 of the file hev4l0np.pdf, see
hev4l0n1. ps / txt / pdf / jpg

hev4: TUB-test chart hev4; 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 hev5l0n1.jpg: Output in format A6 of the file hev5l0np.pdf, see
hev5l0n1. ps / txt / pdf / jpg

hev5: TUB-test chart hev5; 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 hev6l0n1.jpg: Output in format A6 of the file hev6l0np.pdf, see
hev6l0n1. ps / txt / pdf / jpg

hev6: TUB-test chart hev6; HAULAB & IEC, Adaptations 300, 1000,
200 & 40 cd/m^2, (Haubner, 1980) & data; lin [ligtness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure hev7l0n1.jpg: Output in format A6 of the file hev7l0np.pdf, see
hev7l0n1. ps / txt / pdf / jpg

hev7: TUB-test chart hev7; HAULAB & IEC, Adaptations 300, 1000,
200 & 40 cd/m^2, (Haubner, 1980) & data; log [ligtness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure hev8l0n1.jpg: Output in format A6 of the file hev8l0np.pdf, see
hev8l0n1. ps / txt / pdf / jpg

hev8: TUB-test chart hev8; HAULAB & IEC, Adaptations 300, 1000,
200 & 40 cd/m^2, (Haubner) & equations; lin [ligtness L*,
threshold delta_Y, sensitivity delta_Y/Y, contrast Y/delta_Y]



Figure hev9l0n1.jpg: Output in format A6 of the file hev9l0np.pdf, see
hev9l0n1. ps / txt / pdf / jpg

hev9: TUB-test chart hev9; HAULAB & IEC, Adaptations 300, 1000,
200 & 40 cd/m^2, (Haubner) & equations; log [ligtness 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.