Published on March 13, 2009
Project SpaceLock The humble beginnings of the project …
Web cam Wi-fi 802.11 App server – MATLAB, VB/C#2008, IIS web server other programs sms view Users alerts email config Live web interface, medium ajax alerts WAP on Windows mobile browsers GPRS compatible web design
Issues 1. WiFi communication b/w app server and webcam (data acquisition) 2. Matlab or openCV ? 3. Stream or Image sequence 4. SMS alerts how to ? 5. Audio streaming!
WiFi b/w app server and webcam (data acquisition) • This area seems to be dark, reasons – • Lack of experience • Lack of know how • Hence is of importance! • Alternatives – – Serial communication – USB communication – Bluetooth crap (might be slow)
Matlab or openCV ? • OpenCV is portable, matlab is bulky • openCV can hamper design time • We have good experience in matlab • OpenCV forces to switch to VC++ which is relatively uncomfortable world compared to VB2008 • MATLAB over C# - learn a new language, fast dev Due to matlab experience
Stream or Image sequence • Image sequencing proofs – interesting google hacks to get view of insecure security cams from http://johnbokma.com/mexit/2005/01/09/security- webcam-hunting.html • Reveals these – • Refreshing http://22.214.171.124/axis-cgi/mjpg/video.cgi?1232474130547 gives new images of Randy’s Donuts shop • ! Most AXIS cams are insecure, anyone can see Randy’s donut shop • Shit java applet used in some of the views screwd my firefox and slowed the system for a while
Stream or Image sequence • Some findings over net (IP cams) Webcam in motion
Stream or Image sequence • Why did all the IP cams used changing images ? – They have limited resources on hardware – They are just like your DSL routers, connected over internet with webcam interface – Flash plugins, silverlight plugins, Rtsp players aren’t readily available in all kind of Oses and devices, while a browser is available as opera mini in gprs phones to smartphones loaded with windows mobile, to desktops even netbooks. – Its lightweight, we don’t have to create an rtsp player in silverlight, we neither have to depend on live555.com’s open source rtsp server – Yes streaming can be done for recorded activity logs – Technologies like flash, java, silverlight which work in a browser, don’t guarantee complete availability all over world. Silverlight support is very less compared to flash and negligible on linux! – Hence sequence of images instead of live streams, it seems good, one of the shop cams showed good results. – While recorded video satisfy user’s need for records, there an rtsp server can be implemented, and a silverlight based rtsp player to please microsoft. .. Psst! They really want to see people use their software. – To show recorded videos – rtsp handled by live555.com’s lightweight 200 kb server, very easy to use, zero configuration|| played over web through silverlight.
SMS alerts how to ? • 1. cellphone fitted with a cheapass reliance sim connected to server • 2. cellphone around surveillance device– irrelevant as image processing and alert detection is done by matlab, so let the laptop/server control cell phone • Need to research on how to manipulate a cellphone from comp. I got a spare samsung phone (anyone wants to test it? )
Our Strengths • Ebooks ;) • SP road • Profs.. Maybe • I got a DVD – AcadDevCon 2008 – full of tutorials on all microsoft shit ever done • We :) lol
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