About the data set
Spatial integration across frequencies
The data set decribes changes in contrast sensitivity due to the
size of the grating. The data is reproduced from Figure 2, open squares
(vertical gratings for OL) in the paper: Rovamo J, Luntinen O, Näsänen
R. Modelling the dependence of contrast sensitivity on grating area
and spatial frequency. Vision research. 1993;33(18):2773-88.
The stimuli are sine-waves bounded by a squared area on a 50
cd/m2 background.
Note that most metrics cannot reproduce the differences between
sensitivities to patterns of different spatial frequency. It is not
clear what is the reason for that.
Stimuli list
All stimuli shown at the detection threshold magnified x10. The visible banding (quantization) is due to 8-bit image files and display panel and is not present in the actual data.
f=0.12 cpd A=61.22 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 0.573
f=0.12 cpd A=247.42 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 0.573
f=0.12 cpd A=962.96 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 0.573
f=0.25 cpd A=14.43 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 1.15
f=0.25 cpd A=60.20 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 1.15
f=0.25 cpd A=241.92 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 1.15
f=0.25 cpd A=936.33 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 1.15
f=0.50 cpd A=4.00 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 2.29
f=0.50 cpd A=15.97 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 2.29
f=0.50 cpd A=61.46 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 2.29
f=0.50 cpd A=254.98 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 2.29
f=0.50 cpd A=981.45 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 2.29
f=1.00 cpd A=1.00 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=1.00 cpd A=3.87 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=1.00 cpd A=14.98 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=1.00 cpd A=60.20 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=1.00 cpd A=241.92 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=1.00 cpd A=936.33 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 4.58
f=2.00 cpd A=0.24 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=2.00 cpd A=0.96 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=2.00 cpd A=3.75 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=2.00 cpd A=14.59 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=2.00 cpd A=58.95 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=2.00 cpd A=247.42 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=0.06 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=0.24 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=0.96 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=3.86 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=15.50 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=4.00 cpd A=62.16 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 16
viewing_distance = 9.17
f=8.00 cpd A=0.02 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=8.00 cpd A=0.06 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=8.00 cpd A=0.23 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=8.00 cpd A=0.89 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=8.00 cpd A=3.43 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=8.00 cpd A=13.65 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 32
viewing_distance = 9.17
f=16.00 cpd A=0.00 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=16.00 cpd A=0.01 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=16.00 cpd A=0.06 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=16.00 cpd A=0.23 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=16.00 cpd A=0.93 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=16.00 cpd A=3.65 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 64
viewing_distance = 9.17
f=32.00 cpd A=0.01 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 128
viewing_distance = 9.17
f=32.00 cpd A=0.06 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 128
viewing_distance = 9.17
f=32.00 cpd A=0.24 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 128
viewing_distance = 9.17
f=32.00 cpd A=0.96 deg^2
mean luminance = 50 cd/m2
surround_l = 50
pixels_per_degree = 128
viewing_distance = 9.17