About the data set

Recreated stimuli from Foley's masking measurements

The data set recreates the stimuli used for the contrast masking measurements described in: John M. Foley, "Human luminance pattern-vision mechanisms: masking experiments require a new model," J. Opt. Soc. Am. A 11, 1710-1719 (1994). link. The detection thresholds were read from Figure 3b, data for KMF. Stimuli dimensions have been changed so that all images are square and cyclic.

The stimuli contain the detection thresholds for a Gabor patch in the presence of a masking signal. The masking signal has the same frequency as the Gabor patch. The orientation of the masking signals is 0 deg (the same orientations as the Gabor), 45 deg or 90 deg.

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.

C_m=0.0_o=0deg

mean luminance = 32 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-46.1_o=0deg

mean luminance = 31.9959 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-42.1_o=0deg

mean luminance = 31.999 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-37.9_o=0deg

mean luminance = 32.0003 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-33.9_o=0deg

mean luminance = 32.0025 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-30.1_o=0deg

mean luminance = 32.0025 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-26.0_o=0deg

mean luminance = 32.0055 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-21.9_o=0deg

mean luminance = 32.0064 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-17.8_o=0deg

mean luminance = 32.0124 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-13.8_o=0deg

mean luminance = 32.0185 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-9.7_o=0deg

mean luminance = 32.0292 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-46.1_o=90deg

mean luminance = 31.9957 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-38.2_o=90deg

mean luminance = 32 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-34.1_o=90deg

mean luminance = 32.0039 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-30.0_o=90deg

mean luminance = 32.0027 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-25.8_o=90deg

mean luminance = 32.0052 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-21.9_o=90deg

mean luminance = 32.0065 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-18.0_o=90deg

mean luminance = 32.0121 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-13.8_o=90deg

mean luminance = 32.0184 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-9.8_o=90deg

mean luminance = 32.0284 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-46.0_o=45deg

mean luminance = 31.9996 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-42.1_o=45deg

mean luminance = 31.9998 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-37.9_o=45deg

mean luminance = 31.9993 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-34.0_o=45deg

mean luminance = 31.9985 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-30.0_o=45deg

mean luminance = 31.9984 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-26.0_o=45deg

mean luminance = 31.9977 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-22.1_o=45deg

mean luminance = 31.9968 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-17.9_o=45deg

mean luminance = 31.9942 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-14.0_o=45deg

mean luminance = 31.9905 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62

C_m=-9.9_o=45deg

mean luminance = 31.9856 cd/m²
pixels_per_degree = 30
viewing_distance = 1.62