From: Fred L. <ff...@ab...> - 2006-03-29 11:04:54
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All, I'm currently playing with blobfinder and have a question about colour spaces it uses. Why do we have to specify the colours to be tracked in RGB but the thresholds in YUV? Also, there seem to be several RGB to YUV conversions around. Which one is the one used by cmvision? Cheers, Fred P.S. p2os seems to provide blobfinder, but I could not make it do anything. I then discovered cmvision which does work. Either I missed something (if yes could somebody tell me please), or this should be made clearer somewhere. Just my 2p... |
From: Fred L. <ff...@ab...> - 2006-03-29 11:23:48
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On Wednesday 29 Mar 2006 12:03, Fred Labrosse wrote: > All, > > I'm currently playing with blobfinder and have a question about colour > spaces it uses. Why do we have to specify the colours to be tracked in RGB > but the thresholds in YUV? Also, there seem to be several RGB to YUV > conversions around. Which one is the one used by cmvision? I hate doing that. Found the conversion in the files. However, the first question still holds ;-) > > Cheers, > > Fred > > P.S. p2os seems to provide blobfinder, but I could not make it do > anything. I then discovered cmvision which does work. Either I missed > something (if yes could somebody tell me please), or this should be made > clearer somewhere. Just my 2p... > And that as well ;-) Fred |
From: Ajinkya Y. B. <ji...@ii...> - 2006-03-29 17:58:30
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Hi,<br> <br> I've been trying to use the CMVision for some time but did not really get it to work. It give me back no regions for the colour being tracked.<br> If it's not too much trouble would you be kind enough to post a more detailed message about what you did in order to get it working<br> as well as your "color.txt" file for the colours you're tracking? And any tips/traps to watch out for?<br> <br> If this is not exactly a Player/Stage users topic, you can email me directly at <a class="moz-txt-link-abbreviated" href="mailto:ji...@ii...">ji...@ii...</a>. But having seen quite a few <br> blobfinder questions on this topic beforehand as well, I thought it might be good to have an archived step-by-step for the CMVision module,<br> since so many of us use vision actively during our research work.<br> <br> Thanks in advance,<br> Jinx.<br> <br> <br> Fred Labrosse wrote: <blockquote cite="mid...@ab..." type="cite"> <pre wrap="">On Wednesday 29 Mar 2006 12:03, Fred Labrosse wrote: </pre> <blockquote type="cite"> <pre wrap="">All, I'm currently playing with blobfinder and have a question about colour spaces it uses. Why do we have to specify the colours to be tracked in RGB but the thresholds in YUV? Also, there seem to be several RGB to YUV conversions around. Which one is the one used by cmvision? </pre> </blockquote> <pre wrap=""><!----> I hate doing that. Found the conversion in the files. However, the first question still holds ;-) </pre> <blockquote type="cite"> <pre wrap="">Cheers, Fred P.S. p2os seems to provide blobfinder, but I could not make it do anything. I then discovered cmvision which does work. Either I missed something (if yes could somebody tell me please), or this should be made clearer somewhere. Just my 2p... </pre> </blockquote> <pre wrap=""><!----> And that as well ;-) Fred ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! <a class="moz-txt-link-freetext" href="http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642">http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642</a> _______________________________________________ Playerstage-users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Pla...@li...">Pla...@li...</a> <a class="moz-txt-link-freetext" href="https://lists.sourceforge.net/lists/listinfo/playerstage-users">https://lists.sourceforge.net/lists/listinfo/playerstage-users</a> </pre> </blockquote> </body> </html> |
From: Fred L. <ff...@ab...> - 2006-03-30 09:17:01
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On Wednesday 29 Mar 2006 18:57, Ajinkya Y. Bhave wrote: > Hi, > > I've been trying to use the CMVision for some time but did not really get > it to work. It give me back no regions for the colour being tracked. If > it's not too much trouble would you be kind enough to post a=A0 more deta= iled > message about what you did in order to get it working as well as your > "color.txt" file for the colours you're tracking? And any tips/traps to > watch out for? Here's what I have in my robot config file for it: driver ( name "cmvision" colorfile "coloursToTrack.cfg" # colorfile "/usr/local/share/player/config/colors.txt" # debuglevel 1 provides ["blobfinder:0"] requires ["camera:0"] ) and here is coloursToTrack.cfg: [Colors] (255, 0, 0) 0.000000 10 Red [Thresholds] ( 25:164, 80:120,150:240) #( 33:126, 99:110,182:220) It just says I want to track red (255, 0, 0) and consider everything in=20 ( 25:164, 80:120,150:240) (in YUV) to be red. These values come=20 from /usr/local/share/player/config/colors.txt which was installed by playe= r. =20 The second commented out threshold line is another set of limits for red we= =20 try. Using playerv then just works. A javaclient program one of my students wro= te=20 based on an example on the javaclient page also works. Playercam is not=20 working well though. It seems to want to display things on top of blobs bu= t=20 outputs loads of errors as well (GTK related). Haven't got the exact error= s=20 at the moment so haven't reported that yet. Hope this helps. =46red P.S. Would be nice to avoid html emails on the list, especially when it's= =20 html only ;-) |
From: Brian G. <br...@ge...> - 2006-03-29 17:52:17
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On Mar 29, 2006, at 3:03 AM, Fred Labrosse wrote: > I'm currently playing with blobfinder and have a question about > colour spaces > it uses. Why do we have to specify the colours to be tracked in > RGB but the > thresholds in YUV? I guess that's how CMVision works. It's third-party GPL software written by Jim Bruce at CMU. We just wrapped it into a Player driver. > > P.S. p2os seems to provide blobfinder, but I could not make it do > anything. > I then discovered cmvision which does work. Either I missed > something (if > yes could somebody tell me please), or this should be made clearer > somewhere. > Just my 2p... The manual page for the p2os driver says this: * blobfinder o Controls a CMUCam2 connected to the AUX port on the P2OS board (if equipped). You'd only use this if you (a) have a CMUCam2 and (b) don't have any free serial ports on your computer. brian. |
From: Fred L. <ff...@ab...> - 2006-03-30 09:10:31
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On Wednesday 29 Mar 2006 18:25, Brian Gerkey wrote: > On Mar 29, 2006, at 3:03 AM, Fred Labrosse wrote: > > I'm currently playing with blobfinder and have a question about > > colour spaces > > it uses. Why do we have to specify the colours to be tracked in > > RGB but the > > thresholds in YUV? > > I guess that's how CMVision works. It's third-party GPL software > written by Jim Bruce at CMU. We just wrapped it into a Player driver. I noticed that, but was just wondering if anybody had an idea. > > > P.S. p2os seems to provide blobfinder, but I could not make it do > > anything. > > I then discovered cmvision which does work. Either I missed > > something (if > > yes could somebody tell me please), or this should be made clearer > > somewhere. > > Just my 2p... > > The manual page for the p2os driver says this: > > * blobfinder > o Controls a CMUCam2 connected to the AUX port on the P2OS > board (if equipped). > > You'd only use this if you (a) have a CMUCam2 and (b) don't have any > free serial ports on your computer. Missed that bit. Thanks. Fred |