[Bug 789075] New: opencv: new cameracalibrate and cameraundistort elements

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=789075

            Bug ID: 789075
           Summary: opencv: new cameracalibrate and cameraundistort
                    elements
    Classification: Platform
           Product: GStreamer
           Version: 1.12.3
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: philippe_renon at yahoo.fr
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

The two new elements are based on this OpenCV tutorial : Based on this
tutorial:
https://docs.opencv.org/2.4/doc/tutorials/calib3d/camera_calibration/camera_calibration.html

In a nutshell:

The cameracalibrate elements takes an operator through a camera calibration
procedure. The operator presents a calibration pattern to the camera for
multiple detections. See the photos at the end of the tutorial to get a glimpse
of what it looks like. This procedure can be CPU intensive while it is in
progress. All the processing is done inline (can stall the pipeline at times).

The cameraundistort uses the results of the calibration to correct the camera
images. In that process some pixels will be lost and the images will be scaled
up.
It is basically a transform element and CPU usage is moderate.

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