[Coral-List] Picture Randomization Software Recommendation

BRUCE CARLSON exallias2 at gmail.com
Thu Oct 16 20:31:25 EDT 2014


Video is usually shot at around 30 frames per second.  If you simply select random frames, many of them will be nearly identical, and you will likely have thousands of frames.  One method you might consider would be to run the program through editing software such as Final Cut Pro.  Advance the video to create non-overlapping scenes ("quadrats") and then create a "freeze-frame" jpeg of each non-overlapping quadrat.  Once you have all of the freeze frames covering your entire transect (which could run about 50-100 freeze-frames for a 30-meter transect, more or less depending on your vertical distance from the reef).  You could then use whatever method you want to select random freeze-frames for further analysis in CPCe.  

Perhaps someone can suggest a quicker automated procedure but this will work.  

Bruce Carlson

On Oct 16, 2014, at 6:19 AM, Matthew Johnston <johnmatt at nova.edu> wrote:

> Hi Nicole,
> I don't have a recommendation for random image captures from film, however CPCe (Coral Point Count with Excel extensions) is a free software tool produced by the National Coral Reef Institute at NSU that can facilitate ecological assessment once you have your sample images.  With CPCe you can sample random points on your image, classify them based on a set of user-defined types, and run coverage statistics that are sent to excel automatically.
> For more information about CPCe and to download the latest version, you can visit http://www.nova.edu/ocean/cpce/
> If you have any questions about the software, please let me know.
> Best,
> Matt
> ___________________________________
> Matt Johnston
> Research Scientist/Scientific Computer Programmer
> National Coral Reef Institute
> Nova Southeastern University Oceanographic Center
> Guy Harvey Research Institute
> 8000 N. Ocean Drive, Dania, FL 33004 USA
> johnmatt at nova.edu<mailto:johnmatt at nova.edu>
> 954.262.3641 (office, CoE #506)
> 954.205.8007 (cell)
> www.nova.edu/~johnmatt<http://www.nova.edu/~johnmatt>
> Date: Wed, 15 Oct 2014 14:03:59 -0400
> From: Nicole Morgan <nbmorgan11 at gmail.com<mailto:nbmorgan11 at gmail.com>>
> Subject: [Coral-List] Picture Randomization Software Recommendation
> To: Coral List <coral-list at coral.aoml.noaa.gov<mailto:coral-list at coral.aoml..noaa.gov>>
> Message-ID:
>        <CAG9buD_8b4vPDegGWhNUfcjw1eGO3yKCdrT4SVhmDGfvjL7w_w at mail.gmail.com<mailto:CAG9buD_8b4vPDegGWhNUfcjw1eGO3yKCdrT4SVhmDGfvjL7w_w at mail.gmail.com>>
> Content-Type: text/plain; charset=UTF-8
> Hello!
> I'm wondering if anyone would have recommendations for software that
> randomizes picture grabs from video to then do ecological assessments on?
> Prefer if the software is free or more cheaply available, but user-friendly
> software is always nice!  Hopefully my description of the method makes
> sense.
> Thank you!
>  Nicole Morgan
> Ph.D. Student
> EOAS, Florida State University
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