Need Video editing software to measure pixel separation

Discussion in 'Amateur Video Production' started by mcelhane, Mar 12, 2007.

  1. mcelhane

    mcelhane Guest

    I have a need for video editing software that can measure the pixel
    separation of two points in a scene. I am trying to experimentally
    measure how well someone can track a moving target with a video
    camera. The track error (which is what is being measured in this
    experiment) is the difference in the location of the center of the
    camera's field of view and the center of the desired target. So, I
    need some software that can import digital video (one frame at a time)
    and allow me to measure the difference (in pixels or whatever) in the
    camera's boresight and the target location and then I can convert this
    data to track error (in radians by knowing the camera's focal length).

    Thanks to all.
     
    mcelhane, Mar 12, 2007
    #1
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  2. mcelhane

    Smarty Guest

    VideoRedo has an excellent frame capture (either to a file or to the
    Clipboard) combined with extremely precise frame-by-frame selection control.
    I use it all the time to extract and examine individual video frames to
    compare such things as the performance of mpeg encoders, differences in
    camcorder captures, etc. It is very low cost and I believe is offered with a
    free trial for your evaluation before purchase.

    The captured images can be loaded into any photo editing program (like Adobe
    Photoshop for example) where you can enlarge the area of interest and
    literally count pixel separation if you wish to do so.

    Hope his helps.

    Smarty
     
    Smarty, Mar 12, 2007
    #2
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  3. mcelhane

    Ray S Guest

    Since After Effects has motion tracking plugin's built into it. It would
    stand to reason that it could do what you are asking. Cannot say with
    authority, but if you ask this question on the Adobe forums, you would
    probably get a quick and accurate answer.
     
    Ray S, Mar 12, 2007
    #3
  4. mcelhane

    nappy Guest

    Use the track feature of After Effects or Combustion or any tracking
    software and simply observe the tracking curves. or apply that data to a
    dummy object that you can view as the error

    You could write a plugin to export this data although there may be a way to
    do that already.
     
    nappy, Mar 12, 2007
    #4
  5. mcelhane

    nappy Guest


    Oh.. you could also wire this data to a solid which would change size as the
    error increases and overlay that over the video. Like an error bargraph.

    IN After Effects.
     
    nappy, Mar 13, 2007
    #5
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