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Python implement for IL-NIQE (A Feature-Enriched Completely Blind Image Quality Evaluator).

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IL-NIQE (A Feature-Enriched Completely Blind Image Quality Evaluator)

This is the python implement for IL-NIQE. The official Matlab version can be downloaded here or found from the release.

Get Started

  • Test:
python IL-NIQE.py
  • Train
python train.py

You can also train your own model via training.m in the Matlab version. But the results can be different due to the imresize function.

Results

Image IL-NIQE (using official .mat) (Matlab/Python) IL-NIQE (using .mat trained in python) (Python) IL-NIQE (w/o imresize) (Matlab/Python) Time(sec) (Matlab/Python)
pepper_0.png 29.1422 / 28.8966 30.3513 38.7078 / 38.9319 9.9567 / 103.4350
pepper_1.png 36.9637 / 37.4120 37.6577 36.6869 / 37.0163 9.7487 / 90.1218
pepper_2.png 29.5075 / 28.9969 28.4353 28.7137 / 28.6329 10.3733 / 103.6504
pepper_3.png 78.0557 / 83.3886 74.5166 92.3750 / 92.9693 10.5093 / 97.8555
pepper_4.png 46.8697 / 51.7191 46.9279 46.4926 / 46.8856 9.7452 / 103.4113

For Matlab, it uses parpool for multiprocessing and is much faster than python. This implement supports multiprocessing via ray.

  • Difference: The main reasons of the difference may be due to the precision of float computing and different results of similar functions of Matlab and Python, i.e., imresize. (The large differences for 'pepper_3.png' and 'pepper_4.png' are mainly due to resize.)

After comparision, I have found some lines which generate different results, it can be more accurate if you can provide a better function to replace the current one:

  • imresize function: The difference between the imresize function between python and Matlab seems affect the results the most. Maybe the solution is to rewrite the function in python.
  • var: The varience of numpy is sometimes different from the var() function in Matlab. The difference is smaller than 1. Reasons are unknoen yet.

Any suggestions for improvement are welcomed.

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Python implement for IL-NIQE (A Feature-Enriched Completely Blind Image Quality Evaluator).

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