vqmetric

a tool for calculating full-reference objective video quality metrics

Compilation

Compilation tested with Ubuntu 14.0.4 and OpenCV 2.4.8.0

Usage

Options

-r, --reference

path to reference video file

-R, --reference-format

mp4
y4m	 - yuv420 supported

-p, --processed

path to processed video file

-P, --processed-format

mp4
y4m	 - yuv420 supported

--psnr

calculate peak signal to noise ratio

--ssim

calculate structured similarity

--vqm

calculate video quality metric

-t, --time

temporally collapse in time
t is a comma separated list with segment length in seconds, e.g. 1,2,4 
default value: 2

-h, --help

print this message

-v , --verbose

0- silent

1- verbose

2- verbose extended (same as verbose, for now) 

3- verbose debug

-l , --log

0- log silent

1- log psnr and ssim per frame

3- additionally log vqm 

sample call

./vqtool -p <processed video> -r <reference video> --psnr --ssim out

Features

• PSNR As PSNR depends on the input sample depth, we just assume input samples of 8bit. This results when processing 16bit data in an offset of ~48dB, the formula forcalculation is 20*(log(2^8-1))-log(2^B-1))/log(10), with B as the number of bits per sample

• SSIM

• VQM

Supported Input Formats

Supported & tested input formats are

• mp4 (8bit samples)
• y4m (YUV420, 8bit samples)

Work in Progress

• Features
  • MSSSIM
• Support for different resolutions