Motion Detection.
Community Forums/Showcase/Motion Detection.
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| Howdy! Webcams sure are back in, arent they? I've been playing with some maths n stuff recently and created this:   Download here: http://danjeruz.servegame.com/Release.zip Its quite sensitive- to the point that i can stand at the other side of the room, and blink- and it will detect me blinking, and highlight my eye :) |
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| Download speed is painfully slow :D But, looks cool! |
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| :o( It doesn't work for me. Maybe it because i'm using my PS2 eye toy as a webcam :o) |
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| Keep getting a MAV. What Resolution did you set it up for? Frame rate.. and things like that. Got it to sort of work at 640 x 480 but the image was very distorted. |
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| Image size 320x240. The demo code i modified did not work at all, i managed to get it to work at 320x240 only, 24 bit RGB info. I should mention this is also using Panno's DLL- in fact, as you can tell by the titlebar, Its a modified version of some of his code. As such, it never did work for everyone. |
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| @cygnus what is the name of your Camera ?? all pics are better as mine ! i use a logitech quickcam and it is verry noisy ! ah its the only for norc dll !!!! jfk is a bad guy ;)  @ross c i need your xp eye toy driver !!!! |
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| wot? it wasn't me. :-° Sorry, lost control about what is what. |
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| Works very well on my cheapo PCLine webcam (PCLW310). Are you going to do any fun games with this? "window cleaning", and "catch the ball" for instance? |
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| i will glad if somebody post a blitz captured picture here (as cygnus) . if all pictures better as my pictures i need a better webcam |
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| Hi Panno. My camera is a SpaceCam120.. pretty naff if you ask me :) There has been aLOT of work put into that code to detect and remove the noise, otherwise it loks like an untuned TV set :) Well, it can detect actual motion quite well- not fantastic, but quite well, so i might be able to do a punch-breakout or something :) using toka maybe? Its quite slow though- not sure if it'd be really useful for anything :) Noise removal: I do it by comparing the last frame with the current one, and checking for a difference of *greater than X* if it is different, then update the image with new info and add a MOTION flag to the pixel. This still leaves quite a bit of noise in the motion flags, so you then skim through and check the size of each motion pixel- if it is surrounded by other motion pixels then its usually not noise- if it isnt, then it would be and should be reset so its NOT a motion pixel. using the above method and only updating part of the images that are detected as changed, means 1) maybe i can encode a new video format and 2) i get a clean looking screen despite the noise from the webcam. |
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 its "real" realtime ! |
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| Its quite slow though- not sure if it'd be really useful for anything What about if you check say, every 4 pixels rather than each one?Here's a grab from my PCLine webcam. It's it bit dark though:  |
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| What about if you check say, every 4 pixels rather than each one? Already doing that ;) :D it was even SLOWER before. [edit] Thats a great screenie too. I tested it with pens and it can pinpoint the centre of the pen quite well. Stand a while away from the camera, blink an eye, blink the other eye, then stick your tongue out. It'll spot em all. (on mine anyway) I might as well release source on this when im done playing :) |
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| in the moment i have many better idea's for a new dll my new dll is on the way (make better pictures) and is a little faster. also a new scaleroutine for 640*480 is in. if i have solved the bmp from clipboard problem the dll has no problems with other formats as rgb 24. only yvu9 will not work here . i hope the eye toy cam will then work ;) @cygnus if you will i implement the source in the dll . mfg panno |
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| Panno - sounds great! Cygnus - are you using readpixelfast and writepixelfast? It may also be a good idea to read the pixels from a bank and write it to an image, so there won't be 2-way bus-transfer-related speed hits. Also make sure to use the fastest graphics buffer access. I don't remember right now, but some buffers are faster (image vs backbuffer, eventually texturebuffer using flag 256). |
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| Its all done with banks and arrays. (the bank Panno used, plus my screen arrays). Writepixel only occurs when its actually been drawn. No readpixel stuff is actually required. |
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| Panno: The source is a mess, perhaps we could talk online and i could explain what i've done, so that you could write it more efficiently into the DLL's source code? I expect it would be many times faster to do that! |
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| Cygnus: I hope u do release the source code... I can't think of anything I'd use it for off the top of my head... but it would be fun to play with :D |
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| I will release the source, although because it's just me playing around, it's incredibly messy. Would be better for you to understand how i did it, then make it more efficient ;) |
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| ok cygnus i work also on my own routine here ! |
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| Hi Panno. I will also re-write my routine when a more stable dll is released. I think my method works well. Its just not clean yet. Do you have an Estimate Time of Arrival? |
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| my bmp from clipboardproblem is not solved yet this is a must to device indenpendend images |
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| Okay. Keep us informed :D |
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| BTW did anyone try to make a webcam server so far? |
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| iam not jfk . but i have will make a observation camera for some friends , if motion detection thrue then sendimage to a server with date,time. now you can see who have stolen your lighter, or somewhat no iam not paranoid ! its a must in some areas.... |
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| Lol! Panno, With my motion detection system (or a better written one- Contact me via email for code, routines ETC) you could make it just send the parts of the image that moved over :) I'm still playing with it ATM, but when i stop, i'll pop it up here. |
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| I wish I had a webcam right now, this looks like fun! |
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| I have an Infrared Motion Detection Device, so when a burgler is in my appartment, the device will call my mobile cell. In the same time the webcams motion detection will upload images to a webserver. Now I need an app that will convert the image to a WAP compatible bitmap since my mobile doesn't support jpg. Hu Paranoia, what's that? And I would also like to make a real streaming webcam server, with something like 5 FPS or more. |
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| ah now i can load the bitmap from clipboard ! msdn sux gn8 www.plasma.art-fx.org/images/wah.png ok supports now all resolutions and all format here . only yvu9 will not work !!! |
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| jfk! Why would you want to watch your house get burgled!? :P Panno, Excelent! Although, it looks like you havent moved from your computer in days. I think i'll donate you a Webcam! |
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| @cygnus the pic is captured after a long night fighting with winapi i cant computing all days because i have a hard full time job also. @jfk look here http://www.aspheute.com/artikel/20000613.htm |
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| Panno, when this is released, I think I'll rewrite my routines cleanly for you all to see. My code is a right state now! |
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| http://www.plasma.art-fx.org/METHYL.zip bah found a bug ! change row 44 to ok = CallDLL("METHYL","INIT") |
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