[Bug 700977] New: Add colour image enhancement element based on Retinex algorithm

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=700977
  GStreamer | gst-plugins-bad | 1.x

           Summary: Add colour image enhancement element based on Retinex
                    algorithm
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: miguelecasassanchez at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=245277)
 View: https://bugzilla.gnome.org/attachment.cgi?id=245277
 Review: https://bugzilla.gnome.org/review?bug=700977&attachment=245277

Retinex element full patch.

Add colour image enhancement element based on Retinex algorithm. Two types
exist, namely basic and multiscale; both are described in this article:

Rahman, Zia-ur, Daniel J. Jobson, and Glenn A. Woodell. "Multi-scale retinex
for color image enhancement." Image Processing, 1996. Proceedings.,
International Conference on. Vol. 3. IEEE, 1996

Visually speaking the result looks a bit funny, but is pretty invariable to
lightning changes, which is good for some applications, like image
segmentation.

I hope I learned enough in previous upload (skin detection) to get a better
quality patch this time :)

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