From: <sem...@ya...> - 2013-11-30 21:01:05
|
Right, but before software considerations, care must be made to choose a reasonably good camera, don't you think ? ;) Le 30 nov. 2013 à 13:08, Will Stewart a écrit : > > The multi-scale pedestrian detection is no simple matter of trying to pick out a > > shape prior to detection. It has to work in situations where someone is walking > > behind a bush and only the top half of the person is visible. > > This approach may offer some ideas that could be of interest to you; > > http://www.youtube.com/watch?v=_tEzrk0ISDk > > > I only analyze ROIs that meet a certain thresholds and only when there's motion present. > > You are certainly on the right track, and I must admit that I've been slow this holiday season to dig into the ROI solution you've developed, as we have company in town. > > Cheers, > > Will > > On Sat, Nov 30, 2013 at 9:42 AM, Steve Goldsmith <sg...@gm...> wrote: > Right, so the challenge becomes your detection process in a verity of scenarios (inside, outside, different lighting conditions, detect all profiles of face, people wearing hats, etc.). The multi-scale pedestrian detection is no simple matter of trying to pick out a shape prior to detection. It has to work in situations where someone is walking behind a bush and only the top half of the person is visible. Even then you still get a lot of false detections with things like tree branches. It also has to work at multi-scale as well and multiple ROIs. > > The facial recognition I've seen uses 70x70 images to train it. If you are not shrinking the image then you may be wasting CPU if you are feeding it a larger size. Also, I only analyze ROIs that meet a certain thresholds and only when there's motion present. This was illustrated in my example code I linked to. > > It would increase the detection reliability to run another CV routine like face recognition once a pedestrian has been detected. Offloading this to another process would probably be required since it would not finish before the next frame from the camera is ready. > > On Fri, Nov 29, 2013 at 9:20 PM, Will Stewart <wil...@gm...> wrote: > A silhouette is only the portion of the full image that actually has someone moving in it. You can then run a simple face detection, and only when you detect a face do you actually do a facial recognition. So no searching all of every frame for a face, and certainly no reducing image resolution to 320x240. > > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk_______________________________________________ > Motion-user mailing list > Mot...@li... > https://lists.sourceforge.net/lists/listinfo/motion-user > http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome |