This is part of MSU Video Quality Measurement tool Online Help for MSU VQMT 12.1

MSU Video Quality Measurement Tool (MSU VQMT) project:

• Main MSU VQMT page on compression.ru
• Download & Purchase on compression.ru
• Basic information
• Online help
• Metrics reference
• Version history & Changelog

Online help for MSU VQMT 12.1 contents:

• Command-line help
• VQMT various lists and tables
• Usage of VQMT metrics in CLI
• Picture types
• Configuration description
• List of documentation pages for all versions

Content

• Content
  • List of available metrics
    • psnr
    • identity
    • ssim
    • msssim
    • 3ssim
    • vqm
    • blocking
    • blurring
    • delta
    • msad
    • mse
    • time-shift
    • si
    • ti
    • niqe
    • vmaf
    • Test
    • testocl

List of available metrics

psnr

PSNR

http://www.compression.ru/video/quality_measure/info.html#psnr

• Color components: Y U V L R G B RGB YUV
• Type: reference metric
• Usage: -metr psnr <color component>

identity

Identity

http://www.compression.ru/video/quality_measure/info.html#identity

• Color components: Y U V L R G B RGB YUV
• Type: reference metric
• Usage: -metr identity <color component>

This metric can be configured using next parameter(s):

• Type
  Possible types:
  • binary - 1 images are similar, 0 in other case
  • pixels - proportion of similar pixels, 1 - all pixels are same (0..1)
    Default value: binary
    Usage: -set "type=<value>", where <value> can be:
  • binary
  • pixels

ssim

SSIM

http://www.compression.ru/video/quality_measure/info.html#ssim

• Color components: Y U V
• Type: reference metric
• Usage: -metr ssim <color component>
• Usage: -metr ssim_precise <color component>
• Usage: -metr ssim_gpu_id <color component>
• Usage: -metr ssim_cuda <color component>
• Usage: -metr ssim <color component> -dev OpenCL0

msssim

MSSSIM

http://www.compression.ru/video/quality_measure/info.html#msssim

• Color components: Y U V
• Type: reference metric
• Usage: -metr msssim <color component>
• Usage: -metr msssim_precise <color component>
• Usage: -metr msssim_cuda <color component>
• Usage: -metr msssim <color component> -dev OpenCL0

3ssim

3SSIM

http://www.compression.ru/video/quality_measure/info.html#3ssim

• Color components: Y U V
• Type: reference metric
• Usage: -metr 3ssim <color component>
• Usage: -metr 3ssim_cuda <color component>
• Usage: -metr 3ssim <color component> -dev OpenCL0

vqm

VQM

http://www.compression.ru/video/quality_measure/info.html#vqm

• Color components: Y
• Type: reference metric
• Usage: -metr vqm <color component>

blocking

Blocking

http://www.compression.ru/video/quality_measure/info.html#blockingmeasure

• Color components: Y
• Type: no-reference metric
• Usage: -metr blocking <color component>

blurring

Blurring

http://www.compression.ru/video/quality_measure/info.html#ybluringmeasure

• Color components: Y R G B
• Type: no-reference metric
• Usage: -metr blurring <color component>
• Color components: Y U V R G B
• Usage: -metr blurring_delta <color component>

delta

Delta

http://www.compression.ru/video/quality_measure/info.html#delta

• Color components: Y U V L R G B
• Type: reference metric
• Usage: -metr delta <color component>

msad

MSAD

http://www.compression.ru/video/quality_measure/info.html#msad

• Color components: Y U V L R G B
• Type: reference metric
• Usage: -metr msad <color component>

mse

MSE

http://www.compression.ru/video/quality_measure/info.html#mse

• Color components: Y U V L R G B
• Type: reference metric
• Usage: -metr mse <color component>

time-shift

Time shift

http://www.compression.ru/video/quality_measure/info.html#shift

• Color components: Y
• Type: reference metric
• Usage: -metr time-shift <color component>

This metric can be configured using next parameter(s):

• Max. shift
  Maximum shift, that can be detected. Note: large values leads big memory consumption
  Default value: 5
  Usage: -set "max-shift=<value>", where <value> can be:
  • value in range 0..25
• Direction
  Detect only positive shifts (frame dups), negatives (frame drops) or both
  Default value: both
  Usage: -set "direction=<value>", where <value> can be:
  • positive
  • negative
  • both
• Destination metric
  This metric will be used to measure similarity between frames
  Default value: psnr
  Usage: -set "metric=<value>", where <value> can be:
  • psnr
  • ssim
• Show metric values
  Metric will output now only shift, but destination metric values
  Default value: false
  Usage: -set "show-metric=<value>", where <value> can be:
  • true
  • false
• Threshold
  We will consider shift only if metric for neighbour frame better than this thresold multiplied to metric for similar frame
  Default value: 0.99500000476837158
  Usage: -set "threshold=<value>", where <value> can be:
  • any floating point number
• Smoothing
  Will smooth metric values over time. If equal n, than smoothing will be in the interval frame-n..frame+n
  Default value: 1
  Usage: -set "smoothing=<value>", where <value> can be:
  • value in range 0..25

si

SI / TI

http://www.compression.ru/video/quality_measure/info.html#si

• Color components: Y
• Type: no-reference metric
• Usage: -metr si <color component> -dev CPU

ti

SI / TI

http://www.compression.ru/video/quality_measure/info.html#ti

• Color components: Y
• Type: no-reference metric
• Usage: -metr ti <color component> -dev CPU

niqe

NIQE

http://www.compression.ru/video/quality_measure/info.html#niqe

• Color components: Y
• Type: no-reference metric
• Usage: -metr niqe <color component>

This metric can be configured using next parameter(s):

• Mean threshold
  Values of metric greater than this value will be skipped during mean calculation. 0 for disable skipping
  Default value: 15.000000000000000
  Usage: -set "mean_thresh=<value>", where <value> can be:
  • any floating point number
• Threshold smoothing
  Values of metric greater than ‘Mean threshold’ + ‘Threshold smoothing’ will be skipped, values less than ‘Mean threshold’ - ‘Threshold smoothing’ will be assumed with weight 1. Intermediate values will be taken with intermediate weight
  Default value: 5.0000000000000000
  Usage: -set "mean_thresh_smoothing=<value>", where <value> can be:
  • any floating point number
• Type of normalization
  • fast - the fastest algorithm, low precision
    • native - like in native NIQE implementation. Slowest one
    • precise - the most precise algorithm
      Default value: native
      Usage: -set "norm_alg=<value>", where <value> can be:
  • fast
  • native
  • precise

vmaf

Netflix VMAF

• Color components: Y
• Type: reference metric
• Usage: -metr vmaf <color component>

This metric can be configured using next parameter(s):

• Model preset
  Choose built-in model or ‘custom’ for loading model from file. Built-in models:
  • default - VMAF default behaviour:
    • VMAF v0.6.1 for running without confidence interval and per-model values
    • VMAF v0.6.1 4k for previous case if applying 4k model
    • VMAF v0.6.3 for running with confidence interval or per-model values
    • VMAF v0.6.2 4k for previous case if applying 4k model (NOTE: no v0.6.3 for 4k)
  • vmaf_v061 - Netflix model VMAF v0.6.1 (2k or 4k)
  • vmaf_v062 - Netflix model VMAF v0.6.2 (2k or 4k), supports confidence interval
  • vmaf_v063 - Netflix model VMAF v0.6.3 (only 2k), supports confidence interval
  • all_models - vmaf_v061 - vmaf_v063 computed sumultaneously
  • basic_features - view only basic features from VMAF. Model will not be applied
  • standard_features - features that is used in VMAF v0.6.1 and VMAF score (2k or 4k)
  • all_features - view all features from VMAF. Model will not be applied
  • all - all feature and next models:
    • VMAF v0.6.1 (2k or 4k)
    • VMAF v0.6.2 (2k or 4k)
    • VMAF v0.6.3
      Default value: default
      Usage: -set "model_preset=<value>", where <value> can be:
  • default
  • vmaf_v061
  • vmaf_v062
  • vmaf_v063
  • vmaf_v060
  • all_models
  • basic_features
  • standard_features
  • all_features
  • all
  • custom
• Custom model (*.pkl)
  you can specify path to *.pkl file here (or multiple ;-separated *.pkl files). Model file should be placed near pkl file.
  NOTE: this only means if preset is set to ‘custom’
  Default value: ``
  Usage: -set "custom_model_files=<value>", where <value> can be:
  • any string
• 4k
  selection 4k model policy:
  • auto - select 4k if exists suitable model and input video is 4k
  • forced_2k - always 2k model
  • forced_4k - 4k if exsists: VMAF v0.6.1-2
    NOTE: this param does not affects custom model
    Default value: auto
    Usage: -set "4k=<value>", where <value> can be:
  • auto
  • forced_2k
  • forced_4k
• Confidence interval
  turn on additional VMAF features: 95%-confidence interval output and other statistical information
  Default value: false
  Usage: -set "confidence_interval=<value>", where <value> can be:
  • true
  • false
• Per-model values
  output values for all bootstrap models if confidence interval is on
  Default value: false
  Usage: -set "permodel_values=<value>", where <value> can be:
  • true
  • false
• Visualize algorithm (if on)
  if visualization turned on you can select feature to visualize. It’s impossible to calculate distribution of real VMAF value, so you can only visualize one of supposed features
  Default value: default
  Usage: -set "visualize_alg=<value>", where <value> can be:
  • default
  • adm
  • ansnr
  • motion
  • vif
• Use phone model
  turn on postprocessing of metric value that produces more precise results for handheld devices. Select ‘both’ to see both results with and without postprocessing
  Default value: no
  Usage: -set "phone_model=<value>", where <value> can be:
  • no
  • yes
  • both
• Disable clipping values
  turn off clipping value to range set by model (0..100 for example)
  Default value: false
  Usage: -set "disable_clip=<value>", where <value> can be:
  • true
  • false
• Usage: -metr vmaf <color component> -dev OpenCL0

Test

Test OpenCL

testocl

testocl

http://www.compression.ru/video/quality_measure/info.html#

• Color components: Y U V L R G B
• Type: reference metric
• Usage: -metr testocl <color component> -dev OpenCL0

This page is automatically generated by 12.1 dev2 r12640 on 2021-02-05. In case of any question or suggestion, please mail us: video-measure@compression.ru