Identity

General info

Metric type

full-reference image metric

Value range

(images are different) 0..1 (images are same)

Value interpretation

binary mode: 1 - images are same, 0 - images are not same; pixel mode: proportion of same pixels

MSU VQMT implementations

CPU multithreaded

MSU VQMT visualization

pixel-wise

Available colorspaces

R, G, B, Y, U, V, L, RGB, YUV

Output values

metric value

Aggregated values

standard set

MSU VQMT usages

-metr identity [over <color components>]

Other names

inverse L∞-norm

Algorithm description

Metric cas to modes: binary and pixels. In binary mode only two values are possible: 1 if images are pixel-wise similar, 0 if images have at least 1 different value pixel.

In pixel mode the value is proporsion of similar pixels. 1 means all pixels are similar, 0 means all pixels are dirrefent.

Benchmark

Choose benchmark:
Implementation System & settings Colors Resolution FPS Sec. per frame
VQMT 14.0 default multithreaded Y HD 720p 587.08 0.003
VQMT 14.0 default multithreaded Y FullHD 1080p 286.13 0.005
VQMT 14.0 default multithreaded Y 4K 2160p 60.78 0.019
VQMT 14.0 default multithreaded YUV HD 720p 456.22 0.003
VQMT 14.0 default multithreaded YUV FullHD 1080p 217.33 0.006
VQMT 14.0 default multithreaded YUV 4K 2160p 48.15 0.024
VQMT 14.0 default singlethreaded Y HD 720p 183.14 0.006
VQMT 14.0 default singlethreaded Y FullHD 1080p 90.95 0.012
VQMT 14.0 default singlethreaded Y 4K 2160p 22.98 0.046
VQMT 14.0 default singlethreaded YUV HD 720p 143.53 0.008
VQMT 14.0 default singlethreaded YUV FullHD 1080p 70.54 0.015
VQMT 14.0 default singlethreaded YUV 4K 2160p 24.26 0.044
Measurements were done on VQMT 14.0 BETA r12792 PRO for Windows.
CPU: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 8 cores
GPU: NVIDIA CUDA/GeForce GTX 660 Ti
Values can vary depending on system configuration, input format and other factors
Implementation System & settings Colors Resolution FPS Sec. per frame
VQMT 13.1 default multithreaded Y HD 720p 600.62 0.002
VQMT 13.1 default multithreaded Y FullHD 1080p 272.64 0.005
VQMT 13.1 default multithreaded Y 4K 2160p 56.1 0.02
VQMT 13.1 default multithreaded YUV HD 720p 462.14 0.003
VQMT 13.1 default multithreaded YUV FullHD 1080p 212.43 0.006
VQMT 13.1 default multithreaded YUV 4K 2160p 45.26 0.025
VQMT 13.1 default singlethreaded Y HD 720p 185.49 0.006
VQMT 13.1 default singlethreaded Y FullHD 1080p 91.03 0.012
VQMT 13.1 default singlethreaded Y 4K 2160p 23.56 0.044
VQMT 13.1 default singlethreaded YUV HD 720p 142.98 0.008
VQMT 13.1 default singlethreaded YUV FullHD 1080p 69.82 0.015
VQMT 13.1 default singlethreaded YUV 4K 2160p 23.44 0.045
Measurements were done on VQMT 13.1 r12792 PRO for Windows.
CPU: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz, 8 cores
GPU: NVIDIA CUDA/GeForce GTX 660 Ti
Values can vary depending on system configuration, input format and other factors
Implementation System & settings Colors Resolution FPS Sec. per frame
VQMT 14.0 default multithreaded Y HD 720p 1242.42 0.002
VQMT 14.0 default multithreaded Y FullHD 1080p 766.85 0.004
VQMT 14.0 default multithreaded Y 4K 2160p 85.69 0.02
VQMT 14.0 default multithreaded YUV HD 720p 1203.94 0.002
VQMT 14.0 default multithreaded YUV FullHD 1080p 614.29 0.005
VQMT 14.0 default multithreaded YUV 4K 2160p 53.1 0.031
VQMT 14.0 default singlethreaded Y HD 720p 177.72 0.006
VQMT 14.0 default singlethreaded Y FullHD 1080p 81.29 0.012
VQMT 14.0 default singlethreaded Y 4K 2160p 23.69 0.043
VQMT 14.0 default singlethreaded YUV HD 720p 148.95 0.007
VQMT 14.0 default singlethreaded YUV FullHD 1080p 71.48 0.014
VQMT 14.0 default singlethreaded YUV 4K 2160p 21.52 0.048
Measurements were done on VQMT 14.0 BETA r12792 PRO for Linux.
CPU: Intel(R) Xeon(R) Silver 4216 CPU @ 2.10GHz, 64 cores
GPU: NVIDIA CUDA/TITAN RTX
Values can vary depending on system configuration, input format and other factors

Example

Choose example:
Download (orig | dist | vis | animation)
Original
LQ H264, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Blurring, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Random points, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Luminance shift, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=2, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=5, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=10, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=15, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=20, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=40, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=80, Identity-yuv=0.0000
MSU VQMT visualization
Choose example:
Download (orig | dist | vis | animation)
Original
LQ H264, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Blurring, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Random points, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Luminance shift, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=2, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=5, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=10, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=15, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=20, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=40, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=80, Identity-yuv=0.0000
MSU VQMT visualization
Choose example:
Download (orig | dist | vis | animation)
Original
LQ H264, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Blurring, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Random points, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
Luminance shift, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=2, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=5, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=10, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=15, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=20, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=40, Identity-yuv=0.0000
MSU VQMT visualization
Download (orig | dist | vis | animation)
Original
JPEG Q=80, Identity-yuv=0.0000
MSU VQMT visualization

Legacy notes

This metric was introduce in VQMT 13.