http://www.RoboRealm.com/ The newest forum threads. Tue, 30 Nov 1999 00:11:00 EST en-us Copyright: (C) RoboRealm, http://www.RoboRealm.com/ http://www.RoboRealm.com/ Are you assuming that the traffic light has already been located in the image or not. For example, using the full scene photos <a target=_blank href="http://www.roborealm.com/uploads/1310_1.jpg"><img border=1 src="http://www.roborealm.com/uploads/1310_thumb_1.jpg"></a> and <a target=_blank href="http://www.roborealm.com/uploads/1310_2.jpg"><img border=1 src="http://www.roborealm.com/uploads/1310_thumb_2.jpg"></a> we try to find a circular blob that is either red or green to detect the lights. If you know more about how your camera is positioned you could also filter blobs under a certain Y coordinate to reduce false matches on green hedges or whatever.<br><br>We've included a robofile that you can use to process the two images. With one the variable traffic_light is "stop" while the other is "go".<br><br>This should help you get started.<br><br>STeven. http://www.roborealm.com/forum/index.php?thread_id=1308 http://www.roborealm.com/forum/index.php?thread_id=1308 Tue, 30 Nov 1999 00:11:00 EST what i'm trying to do is:<br> <br>1. Use the webcam to detect the presence of the traffic light and let the PC know it has detected a traffic light,<br>2. identify which light is on(e.g green in attached picture) and<br>3.then generate a message on my PC whether the car can pass or not?<br><a target=_blank href="http://www.roborealm.com/uploads/1308_1.jpg"><img border=1 src="http://www.roborealm.com/uploads/1308_thumb_1.jpg"></a> http://www.roborealm.com/forum/index.php?thread_id=1308 http://www.roborealm.com/forum/index.php?thread_id=1308 Tue, 30 Nov 1999 00:11:00 EST