This repository contains python implementation of steerable pyramid version of Visual Information Fidelity (VIF) proposed in [1]. This is a replication of MATLAB version released by the authors of [1] which is available HERE.

1. Python (>=3.5)
2. Numpy (>=1.16)
3. Python Imaging Library (PIL) (>=6.0)
4. Steerable Pyramid Toolbox (PyPyrTools) link

Let imref and imdist denote reference and distorted images respectively. Then the VIF value is calculated as VIF = vifvec(imref, imdist)

A demo code is provided in test.py for testing purposes

[1]H.R. Sheikh, A.C. Bovik and G. de Veciana, "An information fidelity criterion for image quality assessment using natural scene statistics," IEEE Transactions on Image Processing , vol.14, no.12pp. 2117- 2128, Dec. 2005.