Skip to content

A Python port of the MATLAB reference implementation

License

Notifications You must be signed in to change notification settings

0x64746b/python-cpbd

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

41 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

About

CPBD is a perceptual-based no-reference objective image sharpness metric based on the cumulative probability of blur detection developed at the Image, Video and Usability Laboratory of Arizona State University.

[The metric] is based on the study of human blur perception for varying contrast values. The metric utilizes a probabilistic model to estimate the probability of detecting blur at each edge in the image, and then the information is pooled by computing the cumulative probability of blur detection (CPBD).

This software is a Python port of the reference MATLAB implementation. To approximate the behaviour of MATLAB's proprietary implementation of the Sobel operator, it uses an implementation inspired by GNU Octave.

References

CPBD is described in detail in the following papers:

Credits

If you publish research results using this code, I kindly ask you to reference the papers of the original authors of the metric as stated in the previous section as well as their reference implementation in your bibliography. See also the copyright statement of the reference implementation in the license file. Thank you!

Installation

$ pip install cpbd

Usage

In [1]: import cpbd

In [2]: from scipy import ndimage

In [3]: input_image = ndimage.imread('/tmp/LIVE_Images_GBlur/img4.bmp', mode='L')

In [4]: cpbd.compute(input_image)
Out[4]: 0.75343203230148048

Development

$ git clone git@github.com:0x64746b/python-cpbd.git
Cloning into 'python-cpbd'...
$ cd python-cpbd
$ pip install -U '.[dev]'

To quickly run the tests with the invocation interpreter:

$ python setup.py test

To test the library under different interpreters:

$ tox

Performance

The following graph visualizes the accuracy of this port in comparison with the reference implementation when tested on the images of the LIVE database:

Performance on LIVE database

Releases

No releases published

Packages

No packages published