[Octave-bug-tracker] [bug #57053] [octave forge] (image 2.10.0) possible deconvwnr regression

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?57053>

                 Summary: [octave forge] (image 2.10.0) possible deconvwnr
regression
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 13 Oct 2019 08:33:02 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: jy bernier
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.1.0
        Operating System: Mac OS

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Details:

deconvwnr gives wrong result with image 2.10.0. 
Scripts were ok with image 2.6.1 and earlier.

Steps to reproduce:

Copy example at 
https://octave.sourceforge.io/image/function/deconvwnr.html
and change phantom to imread



 %I = phantom ();
 I = imread("http://www.hlevkin.com/TestImages/cameraman.bmp";);
 figure, imshow (I);
 title ("Original image");
 psf = fspecial ("motion", 30, 15);
 blurred = imfilter (I, psf, "conv");
 figure, imshow (blurred);
 title ("Image with added motion blur");
 var_noise = 0.00005;
 blurred_noisy = imnoise (blurred, "gaussian", 0, var_noise);
 figure, imshow (blurred_noisy);
 title ("Image with motion blur and added Gaussian noise");
 estimated_nsr = var_noise / (var(blurred_noisy(:)) - var_noise);
 J = deconvwnr (blurred_noisy, psf, estimated_nsr);
 figure, imshow (J)
 title ({"restored image after Wiener deconvolution",
           "with known PSF and estimated NSR"});



See attached file deconvwnr_broken.jpg for result.

MacOS X 10.9
octave 5.1.0
image 2.10.0
Macport installation

Note : deconvblind working as expected



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File Attachments:


-------------------------------------------------------
Date: Sun 13 Oct 2019 08:33:02 PM UTC  Name: deconvwnr_broken.jpg  Size:
266KiB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=47663>

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