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severity_semantics: ordered_within_corruption
notes:
- Levels do not imply equal perceptual distance across heterogeneous corruptions.
- Benchmark-selected mappings are object_motion_blur, h264_crf, h264_abr, and bit_error.
temporal_corruptions:
- over_exposure
- under_exposure
- snow
- object_motion_blur
- h264_crf
- h264_abr
- bit_error
corruptions:
digital:
jpeg_compression: {parameter: jpeg_quality, values: [25, 18, 15, 10, 7], origin: literature}
pixelate: {parameter: resize_ratio, values: [0.60, 0.50, 0.40, 0.30, 0.25], origin: literature}
contrast: {parameter: contrast_factor, values: [0.40, 0.30, 0.20, 0.10, 0.05], origin: literature}
saturate:
parameter: [saturation_multiplier, saturation_shift]
values: [[0.3, 0.0], [0.1, 0.0], [2.0, 0.0], [5.0, 0.1], [20.0, 0.2]]
origin: literature
illumination:
brightness: {parameter: v_channel_delta, values: [0.10, 0.20, 0.30, 0.40, 0.50], origin: literature}
low_light: {parameter: v_channel_negative_delta, values: [0.10, 0.20, 0.30, 0.40, 0.50], origin: literature}
over_exposure: {parameter: ev_stop, values: [0.4, 0.8, 1.2, 1.6, 2.0], origin: literature}
under_exposure: {parameter: ev_stop, values: [-0.4, -0.8, -1.2, -1.6, -2.0], origin: literature}
weather:
fog:
parameter: [fog_intensity, wibbledecay]
values: [[1.5, 2.0], [2.0, 2.0], [2.5, 1.7], [2.5, 1.5], [3.0, 1.4]]
origin: literature
frost:
parameter: [image_weight, frost_weight]
values: [[1.0, 0.4], [0.8, 0.6], [0.7, 0.7], [0.65, 0.7], [0.6, 0.75]]
origin: literature
snow:
parameter: [loc, scale, zoom, threshold, blur_radius, blur_sigma, mix]
values: [[0.1, 0.3, 3, 0.5, 10, 4, 0.8], [0.2, 0.3, 2, 0.5, 12, 4, 0.7], [0.55, 0.3, 4, 0.9, 12, 8, 0.7], [0.55, 0.3, 4.5, 0.85, 12, 8, 0.65], [0.55, 0.3, 2.5, 0.85, 12, 12, 0.55]]
origin: literature
spatter:
parameter: [loc, scale, sigma, threshold, multiplier, type]
values: [[0.65, 0.3, 4, 0.69, 0.6, 0], [0.65, 0.3, 3, 0.68, 0.6, 0], [0.65, 0.3, 2, 0.68, 0.5, 0], [0.65, 0.3, 1, 0.65, 1.5, 1], [0.67, 0.4, 1, 0.65, 1.5, 1]]
origin: literature
noise:
gaussian_noise: {parameter: standard_deviation, values: [0.08, 0.12, 0.18, 0.26, 0.38], origin: literature}
shot_noise: {parameter: poisson_scale, values: [60, 25, 12, 5, 3], origin: literature}
impulse_noise: {parameter: affected_fraction, values: [0.03, 0.06, 0.09, 0.17, 0.27], origin: literature}
blur:
gaussian_blur: {parameter: sigma_pixels, values: [1, 2, 3, 4, 6], origin: literature}
defocus_blur:
parameter: [disk_radius, alias_blur]
values: [[3, 0.1], [4, 0.5], [6, 0.5], [8, 0.5], [10, 0.5]]
origin: literature
glass_blur:
parameter: [sigma, max_delta, iterations]
values: [[0.7, 1, 2], [0.9, 2, 1], [1.0, 2, 3], [1.1, 3, 2], [1.5, 4, 2]]
origin: literature
camera_motion_blur:
parameter: [radius, sigma]
values: [[10, 3], [15, 5], [15, 8], [15, 12], [20, 15]]
origin: literature
temporal_counted: false
object_motion_blur: {parameter: interpolation_half_window_frames, values: [3, 6, 9, 12, 15], origin: benchmark-specific}
psf_blur:
parameter: psf_rms_spot_radius_mm
values: [0.0296, 0.0832, 0.1102, 0.1588, 0.1939]
origin: measured_lens_models
video:
h264_crf: {parameter: crf, values: [23, 30, 37, 44, 51], origin: benchmark-specific}
h264_abr: {parameter: bitrate_mbps, values: [25, 12.5, 6.25, 3.125, 1.5625], origin: benchmark-specific}
bit_error: {parameter: ffmpeg_noise_parameter, values: [50000000, 25000000, 15000000, 10000000, 5000000], origin: benchmark-specific}
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