Not sure if the following link will be helpful for anyone, but I did
stumble across it.

http://derekmolloy.ie/beaglebone/beaglebone-video-capture-and-image-processing-on-embedded-linux-using-opencv/


On Fri, Oct 17, 2014 at 5:16 PM, Gene Heskett <ghesk...@wdtv.com> wrote:

> On Friday 17 October 2014 16:59:33 andy pugh did opine
> And Gene did reply:
> > On 17 October 2014 20:57, Gene Heskett <ghesk...@wdtv.com> wrote:
> > > Driving the machine to center that mark so you can record it using
> > > the align package, is however pretty frustrating when its 5 seconds
> > > after you have taken the finger off the moveit key before the camera
> > > shows you where its actually at.
> >
> > That's not a "realtime" issue, that's a "computer too slow" issue.
> >
> > If that 5 seconds was servo thread time just think what else would be
> > going wrong..
>
> I don't think so Andy, because theres at least 4 or 5 full processes
> looking at and possibly adding to that image between the camera and the
> display window.  I have tried a much slower base thread and the lag was
> still the same.  Looking at the camera itself with something like cheese,
> it is much faster, but thats right out of the camera, raw. No cropping,
> DRO additions & no crosshairs or target circles added, I suspect a faster
> USB might help some, and a cpu running at 15ghz would help, but thats an
> 1.4ghz atom & thats all on one core.  Firefox doesn't lag, and neither
> does konversation, the IRC client.  Typically both are running.
>
> Camunits runs at a low enough priority, but all that buffer copying
> between the various video treatment modules does take time.
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
>
>
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