[Octave-patch-tracker] [patch #8059] [new function for image package] ranktf.m

[Ming Liu]

URL:
  <http://savannah.gnu.org/patch/?8059>

                 Summary: [new function for image package] ranktf.m
                 Project: GNU Octave
            Submitted by: liuming198904
            Submitted on: Sat 25 May 2013 06:18:15 AM GMT
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

rank transform for an image.
image is the real name of an image. windowsize is the size of window to
be used for the rank transform, it must be an odd possitive integer number
greater than 3
I is the rank transformed image, based on the window size you choose.
For example, if the  window size is 3x3 and apply
the window to the original grayscale image, then the center of the pixels
within the window from the original grayscale image will be
replaced by the ‘rank’ of the center pixel value. So it is between
1 and 9, assuming there are no same pixel values. The advantage is all the
pixel values in the image at last will be replaced by their ranks. So
the noise and other mistakes during taking the photo will be ideally
ignored. All the pixel values will be in a small range (the square of
the window size). This is a very useful function in image processing



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File Attachments:


-------------------------------------------------------
Date: Sat 25 May 2013 06:18:15 AM GMT  Name: Ming_Liu_ranktf.patch  Size: 2kB 
 By: liuming198904

<http://savannah.gnu.org/patch/download.php?file_id=28166>
-------------------------------------------------------
Date: Sat 25 May 2013 06:18:15 AM GMT  Name: ranktf.m  Size: 2kB   By:
liuming198904

<http://savannah.gnu.org/patch/download.php?file_id=28167>

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