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Phase Coherence and Sharpness Metrics

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Contents of this page

General description and related papers
Source codes
Source images
History

General description and related papers

On this page you will find source codes related to the estimation of the Global Phase Coherence (GPC), the Sharpness Index (SI), and the S Index (a simplified version of the Sharpness Index) of an image, as defined in the following papers:

	G. Blanchet, L. Moisan, B. Rougé, "Measuring the global phase coherence of an image" (ICIP 2008).
	publisher site (IEEExplore)       PDF       Citation (text and BibTeX)
	G. Blanchet, L. Moisan, "An explicit Sharpness Index related to Global Phase Coherence" (ICASSP 2012).
	publisher site (IEEExplore)       PDF       Citation (text and BibTeX)
	A. Leclaire, L. Moisan, "No-reference image quality assessment and blind deblurring with sharpness metrics exploiting Fourier phase information", to appear in Journal of Mathematical Imaging and Vision, 2015.
	PDF (revised preprint)

Source codes

You may freely use the programs given below. If you do, please make reference to this web page and to the corresponding paper. If you want to distribute the codes, please do not modify them (or if you do so, indicate clearly in the codes that you did).

Several source codes are available:

• Scilab codes (usage: see comments inside the source codes)
    ZIP archive with all Scilab codes, containing:
    -  global_phase_coherence.sci version 1.3
    -  sharpness_index.sci version 1.4
    -  s_index.sci version 1.2
   
• Matlab codes (usage: see comments inside the source codes)
    ZIP archive with all Matlab codes, containing:
    -  dequant.m perdecomp.m logerfc.m (common modules)
    -  global_phase_coherence.m version 1.0
    -  sharpness_index.m version 1.0
    -  s_index.m version 1.0
   

Source images

Here are some images used in the papers mentioned above:

• Lacornou (256x256):   png   pgm
• Lena (512x512):   png   pgm
• Barbara (512x512):   png   pgm
• House (256x256):   png   pgm
• Room (512x512):   png   pgm
• Yale (512x512):   png   pgm
• Lotriver (4368x2912):   png   pgm

Zip archives with all images in PNG format (7.6 Mb) or in PGM format (10 Mb)


History

01/2014: first public version
02/2014: Matlab codes released

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