[Bug 744001] New: [PATCH] New histogram plugin for GRAY8 images

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=744001
  GStreamer | gst-plugins-bad | 1.4.5

           Summary: [PATCH] New histogram plugin for GRAY8 images
    Classification: Platform
           Product: GStreamer
           Version: 1.4.5
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: patcherwork at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


This patchset creates a new histogram element for calculating histogram
metadata from a video stream. The plugin provides 2 elements:

vhist: An element for extracting histogram data from a stream. It can take
a single parameter, called "binno" for defining the number of bins. This
component calculates the histogram data for the provided image and adds it
to the pipeline using the gstmeta subsystem.

drawhist: A visualizer of the calculated metadata. Requires that metadata 
be appended to the stream. The resulting output is a GREY8 image of the
histogram.

To test the plugin, the following pipeline can be used:

gst-launch-1.0 videotestsrc ! vhist binno=5 ! drawhist ! videoconvert !
ximagesink

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