Video quality metrics, reference implementation in python: VIF, SSIM, PSNR, ...
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demo JPEG compression level demo Mar 11, 2015
LICENSE Initial commit Mar 6, 2014
README.md Add niqe to readme, misc Mar 11, 2015
measure.py Add reco Mar 11, 2015
modelparameters.mat NIQE model parameters Mar 11, 2015
niqe.py NIQE: Natural Image Quality Evaluator Mar 11, 2015
psnr.py Fix crash when images are identical Mar 11, 2015
reco.py RECO: Relative Polar Edge Coherence Mar 11, 2015
ssim.py Formatting changes Mar 11, 2015
ssim_theano.py Add ssim, psnr May 29, 2014
vifp.py Add ssim, psnr May 29, 2014

README.md

Video Quality Metrics

Video quality metrics, reference implementation in python, with GPU optimizations and C versions as time permits.

  • VIF (sometimes called VIF-P or VIFP), Visual Information Fidelity: implemented
  • SSIM, Structural Similarity Metric: implemented
  • PSNR, Peak Signal to Noise Ratio: implemented
  • RECO, Relative Polar Edge Coherence: implemented
  • NIQE, Natural Image Quality Evaluator: implemented
  • MS-SSIM, MultiScale Structural Similarity Metric: planned
  • 3SSIM, 3-Component Structural Similarity Metric: planned
  • VQUAD-HD: planned
  • VQM: maybe
  • UIQ, Universal Image Quality: maybe
  • MSSIM, Motion SSIM: maybe

Example

Run the demo/jpg_demo.py script, which will compress lena.png with JPEG at every quality setting 0-100, and plot all metric values vs quality setting and vs file size.

JPEG Metric vs Quality Setting

JPEG Metric vs File Size

References

H. R. Sheikh and A. C. Bovik, “Image information and visual quality,” Image Processing, IEEE Transactions on, vol. 15, no. 2, pp. 430–444, 2006.

V. Baroncini, L. Capodiferro, E. D. Di Claudio, and G. Jacovitti, “The polar edge coherence: a quasi blind metric for video quality assessment,” EUSIPCO 2009, Glasgow, pp. 564–568, 2009.

Z. Wang, E. P. Simoncelli, and A. C. Bovik, “Multiscale structural similarity for image quality assessment,” Conference Record of the Thirty-Seventh Asilomar Conference on Signals, Systems and Computers, 2003, vol. 2, pp. 1398–1402.

Mittal, Anish, Rajiv Soundararajan, and Alan C. Bovik. "Making a completely blind image quality analyzer." Signal Processing Letters, IEEE 20.3 (2013): 209-212.