Contrast matching models fitting with CSF scaling

Fitting error

Dataset Fitting error Matched contrast adjustment
Kulikowski's model (1976) Peli's model (1990) Georgesons's model (1991) Foley and Legge's model (1981) Ashraf and Mantiuk's model (2024) Kulikowski's model (1976) Peli's model (1990) Georgesons's model (1991) Foley and Legge's model (1981) Ashraf and Mantiuk's model (2024)
Average training 4.20 [dB] 8.11 [dB] 4.66 [dB] 8.60 [dB] 4.64 [dB] N/A N/A N/A N/A N/A
hdr_matching_young 5.27 [dB] 5.84 [dB] 5.79 [dB] 6.99 [dB] 5.19 [dB] 1.512 1.000 1.639 0.651 1.563
georgeson1975 5.58 [dB] 11.65 [dB] 5.57 [dB] 12.32 [dB] 5.01 [dB] 0.607 1.000 0.605 0.309 0.628
georgeson1975_lum 1.83 [dB] 33.88 [dB] 2.17 [dB] 5.07 [dB] 1.98 [dB] 0.418 1.000 0.441 0.134 0.439
kulikowski1976_lum 0.26 [dB] 17.96 [dB] 1.24 [dB] 15.20 [dB] 3.59 [dB] 1.028 1.000 1.012 8.718 0.696
hess1990 0.37 [dB] 11.61 [dB] 0.79 [dB] 13.12 [dB] 3.48 [dB] 1.006 1.000 0.991 4.157 1.002
ost_ar_matching 1.10 [dB] 2.28 [dB] 1.01 [dB] 4.57 [dB] 1.07 [dB] 1.032 1.000 1.024 1.022 1.022

Model parameters

Kulikowski's model (1976)
Peli's model (1990)
Georgesons's model (1991)
p.q = 0.988989; p.c_norm = 1.03091;
Foley and Legge's model (1981)
p.gamma = 0.513457; p.k = 2.55349;
Ashraf and Mantiuk's model (2024)
p.delta_m = 2.38585e-28; p.delta_c = 0.85373; p.alpha_m = 0.87951; p.alpha_c = 0.00150563; p.power_ref = 0.933649;

Legend

To keep the plots legible, only up to 3 models are plotted.

↸Dataset: [hdr_matching_young] Ashraf et al., 2022

Contrast matching across luminance levels (ref level: 200 nits, fixed cycles, lambda: 0.5)



Contrast matching across luminance levels (ref level: 20 nits, fixed cycles, lambda: 0.5)



Contrast matching across luminance levels (ref level: 20 nits, fixed cycles, lambda: 1)



↸Dataset: [georgeson1975] Georgeoson & Sullivan, 1975

Contrast matching across spatial frequencies (ref sf: 5 cpd)



↸Dataset: [georgeson1975_lum] Georgeoson & Sullivan, 1975

Contrast matching across photopic (10 cd/m^2) reference and scotopic (0.001585 cd/m^2) test stimulus at 2 cpd



↸Dataset: [kulikowski1976_lum] Kulikowski, 1976

Contrast matching across test photopic (10 cd/m^2) stimulus and scotopic luminance reference stimuli at 5 cpd



↸Dataset: [hess1990] Hess, 1990

Contrast matching across test photopic (200 cd/m^2) stimulus and scotopic luminance reference stimuli



↸Dataset: [ost_ar_matching] SIGGRAPH Asia 25

Contrast matching across ambient light levels (fixed size, sigma: 1)