Re: [PD] Opencv pd
For the last 2 weeks I have been trying to write a motion tracking external using the blob motion tracker in opencv. I had success with writing a program that recieves a path to an avi and motion tracks the blobs and prints their position. Now I am writing the IOhannes m zmoelnig wrote: otoh, why don't you just use the Gem framework? My thoughts *EXACTLY* Why spend time re-doing what exists? (for fun, perhaps ;) As it is, pix_blob works quite well - and if you need multiblob, update pd/gem from CVS - pix_multiblob works very well also, and is quite fast. *instancing* / id tracking is rare (not inherent to openCV either), but I was able to hack it well enough for my purposes. if nothing else works, it might be simplest to just write your own application (without pd) and send the data to pd via your favourite protocol (FUDI, OSC, SMTP...) Indeed - for more complicated operations (face body recognition) I used opencv's haars, then sent the coordinates to GEM via OSC for various visual effects. From pd context, I don't see what benefit opencv blobs have over pix_multi/blob; but perhaps I am missing something! ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Opencv pd
I dont know if you have ever used pix_multiblob before. This would be my first option and I already had built a huge project using pix_multiblob before I realized that just tracking 5 blobs with pix_multiblob on a G5 dual 2Ghz with a Radeon 9800 XT and 3 gig of ram it was using up 98-104 percent of my cpu on just tracking lone. Try the pix_multiblob example. The opencv app I built running on a powerbook g4 1.5Ghz with 512mb of ram only uses 38-45 of my cpu with the same movie. In my project I am going to need to track at least 15 to 20 blobs if not more. You do the math. The reason I want to build it into an external is for convenience and for the learning process. If you have any help to give I will be happy to learn from you. Alain From: nanodust [EMAIL PROTECTED] Date: 2007/05/30 Wed AM 08:07:45 EDT To: pd-list@iem.at Subject: Re: [PD] Opencv pd For the last 2 weeks I have been trying to write a motion tracking external using the blob motion tracker in opencv. I had success with writing a program that recieves a path to an avi and motion tracks the blobs and prints their position. Now I am writing the IOhannes m zmoelnig wrote: otoh, why don't you just use the Gem framework? My thoughts *EXACTLY* Why spend time re-doing what exists? (for fun, perhaps ;) As it is, pix_blob works quite well - and if you need multiblob, update pd/gem from CVS - pix_multiblob works very well also, and is quite fast. *instancing* / id tracking is rare (not inherent to openCV either), but I was able to hack it well enough for my purposes. if nothing else works, it might be simplest to just write your own application (without pd) and send the data to pd via your favourite protocol (FUDI, OSC, SMTP...) Indeed - for more complicated operations (face body recognition) I used opencv's haars, then sent the coordinates to GEM via OSC for various visual effects. From pd context, I don't see what benefit opencv blobs have over pix_multi/blob; but perhaps I am missing something! ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Opencv pd
[EMAIL PROTECTED] wrote: I dont know if you have ever used pix_multiblob before. This would be my first option and I already just to make sure that we do not misunderstand each other: i had no intention in saying that you should stick to the existing objects. i thought that you should integrate your openCV objects into Gem and not brew your own objects. the problems you described (sending pointers to and fro), show that you do not create Gem objects (which would handle this stuff for you). mfg.asdr IOhannes ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Opencv pd
IOhannes m zmoelnig wrote: i thought that you should integrate your openCV objects into Gem and not brew your own objects. I too would like to make some objects in Gem. I have already done some openGL externals for max/msp (see lifeGL and lifeTorus at http://www.billvorn.concordia.ca/menuall.html) and would like to port them to pd. It seems the alternatives are to set a tcl/tk drawable as openGL, or Gem. Is there any documentation about the Gem API or is it all in the Gem source? Martin ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Opencv pd
IO, I understand what you where saying. I just figured it would be easier to make a self contained external than to try to figure out how to convert things so that Gems GL stuff could use it. From what you are saying I was probably wrong. I just could not figure it out really and there was no how to for Gem like the how to you wrote for Pd (althogh the Gem sorce is documented well). Nanodust, When I said have you used pix_multiblob before I was not trying to be inflamatory I was just asking. From your reply I think it might have come out that way but it was not ment that way. I appreciate all input. Thanks to all, Alain From: IOhannes m zmoelnig [EMAIL PROTECTED] Date: 2007/05/30 Wed AM 09:57:55 EDT To: [EMAIL PROTECTED] CC: pd-list@iem.at Subject: Re: [PD] Opencv pd [EMAIL PROTECTED] wrote: I dont know if you have ever used pix_multiblob before. This would be my first option and I already just to make sure that we do not misunderstand each other: i had no intention in saying that you should stick to the existing objects. i thought that you should integrate your openCV objects into Gem and not brew your own objects. the problems you described (sending pointers to and fro), show that you do not create Gem objects (which would handle this stuff for you). mfg.asdr IOhannes ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
