Scientists Invent Undetectable Speed Detector

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Scientists Invent Undetectable Speed Detector
MidnightDad 21 April 2005 22:44:25
	http://www.thenewspaper.com/news/03/343.asp Scientists Invent Undetectable Speed Detector Military technology is used to create a visually based speed measurement device. University of Florida researchers believe they have outwitted the makers of radar detectors and other speed detection countermeasures. Using a $5 million grant from the Air Force, they've developed software that can use live video camera footage to recognize objects and measure their speed. It does so by calculating the distance a car moves in a series of photos compared to a fixed object -- such as a light pole -- in the background. Because the system is entirely passive, unlike conventional laser and radar speed guns, it cannot be detected. "If it can view the object moving, that's all it needs. The computer figures out everything else," said Warren Dixon, University of Florida assistant professor of mechanical and aerospace engineering. "We're trying to use both regular and infrared cameras, so night or adverse weather conditions don't present a problem." The system is similar to the SPECS speed averaging cameras in use in the UK and Australia. The latter system uses multiple cameras to calculate a car's speed over a known, fixed distance. The researchers believe they can create a device has two big advantages over SPECS -- it would be entirely mobile and it would work with a single camera. The military continues to be interested in potential applications for the software. Additional details on their research will be published in the latest issue of IEEE's Transactions on Robotics and Automation.
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John F. Carr 21 April 2005 22:54:54 [ permanent link ]
	In article <1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews>, MidnightDad <someone@microsoft.com> wrote:>http://www.thenewspaper.com/news/03/343.asp> Scientists Invent Undetectable Speed Detector>Military technology is used to create a visually based speed measurement >device. Undetectable camera enforcement systems have existed for over a century. The question is not can the government monitor every driver's speed, the question is will the people let the government monitor every driver's speed. -- John Carr (jfc@mit.edu)
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Brent P 22 April 2005 01:03:46 [ permanent link ]
	In article <1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews>, MidnightDad wrote: compared to a fixed object -- such as a light pole -- in the background. > Because the system is entirely passive, unlike conventional laser and radar > speed guns, it cannot be detected. Wrong. It is electronic, it has some sort of signature that can be detected. Not economical to detect at the present time is more accurate. "If it can view the object moving, that's all it needs. The computer figures > out everything else," said Warren Dixon, University of Florida assistant > professor of mechanical and aerospace engineering. "We're trying to use both > regular and infrared cameras, so night or adverse weather conditions don't > present a problem." If there is no greater evidence that the speeding ticket industry is profitable, it's the existance of this project. Seriously, if it was about safety, it wouldn't take any special gizmos to convict people. Just a dash camera on the cop's car showing the ticketed driver driving unsafely. We only need the gizmos because the violation isn't about safety, it's about going faster than an arbitary number on a sign.
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Brent P 22 April 2005 01:06:02 [ permanent link ]
	In article <4267f6fe$0$577$b45e6eb0@senator-bedfellow.mit.edu>, John F. Carr wrote: The question is not can the government monitor every driver's> speed, the question is will the people let the government monitor> every driver's speed. The government will not make speeding go away until it is no longer profitable for them to define the majority of drivers as violators.
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Ivan 22 April 2005 01:22:21 [ permanent link ]
	In article <4267f6fe$0$577$b45e6eb0@senator-bedfellow.mit.edu>, jfc@mit.edu (John F. Carr) wrote: The question is not can the government monitor every driver's> speed, the question is will the people let the government monitor> every driver's speed. And the answers is a resounding "yes." Ivan
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James C. Reeves 22 April 2005 03:18:32 [ permanent link ]
	This isn't new. Cops here have been using helicopters with observers that measure time a vehicle passes between two painted lines of known distance to measure speed for decades. "MidnightDad" <someone@microsoft.com> wrote in message news:1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews...> http://www.thenewspaper.com/news/03/343.asp> Scientists Invent Undetectable Speed Detector> Military technology is used to create a visually based speed measurement > device.> University of Florida researchers believe they have outwitted the makers > of radar detectors and other speed detection countermeasures. Using a $5 > million grant from the Air Force, they've developed software that can use > live video camera footage to recognize objects and measure their speed. It > does so by calculating the distance a car moves in a series of photos > compared to a fixed object -- such as a light pole -- in the background. > Because the system is entirely passive, unlike conventional laser and > radar speed guns, it cannot be detected.> "If it can view the object moving, that's all it needs. The computer > figures out everything else," said Warren Dixon, University of Florida > assistant professor of mechanical and aerospace engineering. "We're trying > to use both regular and infrared cameras, so night or adverse weather > conditions don't present a problem."> The system is similar to the SPECS speed averaging cameras in use in the > UK and Australia. The latter system uses multiple cameras to calculate a > car's speed over a known, fixed distance. The researchers believe they can > create a device has two big advantages over SPECS -- it would be entirely > mobile and it would work with a single camera.> The military continues to be interested in potential applications for the > software. Additional details on their research will be published in the > latest issue of IEEE's Transactions on Robotics and Automation.>
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James C. Reeves 22 April 2005 03:19:14 [ permanent link ]
	"Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message news:hbudnVIgWo-viPXfRVn-vA@comcast.com...> In article <1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews>, > MidnightDad wrote:> compared to a fixed object -- such as a light pole -- in the background.>> Because the system is entirely passive, unlike conventional laser and >> radar>> speed guns, it cannot be detected.> Wrong. It is electronic, it has some sort of signature that can be> detected. Not economical to detect at the present time is more accurate. A video camera leaves a electronic signature that can be detected? "If it can view the object moving, that's all it needs. The computer >> figures>> out everything else," said Warren Dixon, University of Florida assistant>> professor of mechanical and aerospace engineering. "We're trying to use >> both>> regular and infrared cameras, so night or adverse weather conditions >> don't>> present a problem."> If there is no greater evidence that the speeding ticket industry is> profitable, it's the existance of this project. Seriously, if it was> about safety, it wouldn't take any special gizmos to convict people. Just> a dash camera on the cop's car showing the ticketed driver driving> unsafely. We only need the gizmos because the violation isn't about> safety, it's about going faster than an arbitary number on a sign.>
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Kenneth P. Stox 22 April 2005 05:03:17 [ permanent link ]
	James C. Reeves wrote:> A video camera leaves a electronic signature that can be detected? Sure does. Go read up on what Tempest is and its application for secure environments.
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Scott en Aztln 22 April 2005 07:33:35 [ permanent link ]
	On Thu, 21 Apr 2005 19:19:14 -0400, "James C. Reeves" <jcnospam@nospam.com> wrote: compared to a fixed object -- such as a light pole -- in the background.>>> Because the system is entirely passive, unlike conventional laser and >>> radar>>> speed guns, it cannot be detected.>> Wrong. It is electronic, it has some sort of signature that can be>> detected. Not economical to detect at the present time is more accurate.> A video camera leaves a electronic signature that can be detected? Yes. In fact, any device controlled with a microprocessor will generate measurable RFI. The problem is designing and building an economical receiver sensitive enough to detect that RFI. -- Sloth Kills! http://www.geocities.com/slothkills/
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Paul 22 April 2005 09:32:10 [ permanent link ]
	On Thu, 21 Apr 2005 16:06:02 -0500, Brent P , said the following in rec.autos.driving... In article <4267f6fe$0$577$b45e6eb0@senator-bedfellow.mit.edu>, > John F. Carr wrote:> The question is not can the government monitor every driver's> > speed, the question is will the people let the government monitor> > every driver's speed.> The government will not make speeding go away until it is no longer > profitable for them to define the majority of drivers as violators. At the risk of sounding like judy, that's why I favor jailing speeders. Make it start costing these towns money instead of making them money and watch the speed traps dry up.
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Paul 22 April 2005 09:35:48 [ permanent link ]
	On Thu, 21 Apr 2005 19:18:32 -0400, James C. Reeves , said the following in rec.autos.driving... This isn't new. Cops here have been using helicopters> with observers that measure time a vehicle passes > between two painted lines of known distance to > measure speed for decades. Makes me curious as to how many innocent drivers have been nabbed by a dishonest cop in the aircraft clicking off the stopwatch a second or so before the car reached the second line.
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Jim Yanik 22 April 2005 18:48:53 [ permanent link ]
	"James C. Reeves" <jcnospam@nospam.com> wrote in news:LsGdnUE8kN9aqfXfRVn-qw@comcast.com: This isn't new. Cops here have been using helicopters with observers> that measure time a vehicle passes between two painted lines of known> distance to measure speed for decades. VASCAR. A computer in a police car that measures the distance between two points the officer enters into it by a switch,and then measures the time that a vehicle takes to pass between the two distance points,also clicked into the computer by the officer,it's been around a very long time. "MidnightDad" <someone@microsoft.com> wrote in message > news:1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews...>> http://www.thenewspaper.com/news/03/343.asp>> Scientists Invent Undetectable Speed Detector>> Military technology is used to create a visually based speed>> measurement device.>> University of Florida researchers believe they have outwitted the>> makers of radar detectors and other speed detection countermeasures.>> Using a $5 million grant from the Air Force, they've developed>> software that can use live video camera footage to recognize objects>> and measure their speed. It does so by calculating the distance a car>> moves in a series of photos compared to a fixed object -- such as a>> light pole -- in the background. Because the system is entirely>> passive, unlike conventional laser and radar speed guns, it cannot be>> detected. >> "If it can view the object moving, that's all it needs. The computer >> figures out everything else," said Warren Dixon, University of>> Florida assistant professor of mechanical and aerospace engineering.>> "We're trying to use both regular and infrared cameras, so night or>> adverse weather conditions don't present a problem.">> The system is similar to the SPECS speed averaging cameras in use in>> the UK and Australia. The latter system uses multiple cameras to>> calculate a car's speed over a known, fixed distance. The researchers>> believe they can create a device has two big advantages over SPECS -->> it would be entirely mobile and it would work with a single camera.>> The military continues to be interested in potential applications for>> the software. Additional details on their research will be published>> in the latest issue of IEEE's Transactions on Robotics and>> Automation. >> -- Jim Yanik jyanik at kua.net
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223rem 22 April 2005 19:31:23 [ permanent link ]
	MidnightDad wrote:> http://www.thenewspaper.com/news/03/343.asp> Scientists Invent Undetectable Speed Detector> Military technology is used to create a visually based speed measurement > device.> University of Florida researchers believe they have outwitted the makers of > radar detectors and other speed detection countermeasures. Using a $5 > million grant from the Air Force, they've developed software that can use > live video camera footage to recognize objects and measure their speed. It > does so by calculating the distance a car moves in a series of photos > compared to a fixed object -- such as a light pole -- in the background. > and it would work with a single camera. So the computer is supposed to track the moving object between two reference landmarks (two light poles for example). One problem is that objects change appereance due to variations in illumination conditions so false matches across frames can occur. Objects can also get occluded by other objects, again false matches. Also, with one camera one cannot compute depth, so it is impossible to determine the exact distance between vehicle and reference points. The military continues to be interested in potential applications for the > software. Additional details on their research will be published in the > latest issue of IEEE's Transactions on Robotics and Automation. Actually the paper appearead in Automatica in 2005: V. Chitrakaran, D. M. Dawson, W. E. Dixon, and J. Chen, вЂњIdentification of a Moving ObjectвЂ™s Velocity with a Fixed Camera,вЂќ Automatica, Vol. 41, No.3, pp. 553 - 562, March 2005. http://www.mae.ufl.edu/~dixon/NCRWeb/publications.html Nowhwere in the paper the problem of matching the object across frames is discussed.
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Matthew Russotto 22 April 2005 21:38:23 [ permanent link ]
	In article <OomdnWy2veFtqfXfRVn-tQ@comcast.com>, James C. Reeves <jcnospam@nospam.com> wrote:> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message >news:hbudnVIgWo-viPXfRVn-vA@comcast.com...>> In article <1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews>, >> MidnightDad wrote:>> compared to a fixed object -- such as a light pole -- in the background.>>> Because the system is entirely passive, unlike conventional laser and >>> radar>>> speed guns, it cannot be detected.>> Wrong. It is electronic, it has some sort of signature that can be>> detected. Not economical to detect at the present time is more accurate.> A video camera leaves a electronic signature that can be detected? Yes, quite a few in fact. -- There's no such thing as a free lunch, but certain accounting practices can result in a fully-depreciated one.
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Paul 22 April 2005 21:44:50 [ permanent link ]
	On 22 Apr 2005 14:48:53 GMT, Jim Yanik , said the following in rec.autos.driving... "James C. Reeves" <jcnospam@nospam.com> wrote in> news:LsGdnUE8kN9aqfXfRVn-qw@comcast.com: > This isn't new. Cops here have been using helicopters with observers> > that measure time a vehicle passes between two painted lines of known> > distance to measure speed for decades.> VASCAR. A computer in a police car that measures the distance between two > points the officer enters into it by a switch,and then measures the time > that a vehicle takes to pass between the two distance points,also clicked > into the computer by the officer,it's been around a very long time. And just like aerial speed enforcement, it is highly subject to the honesty of the cop operating the system; and with the police and local government having a financial stake in speed enforcement, that cop's honesty and integrity are highly suspect, IMO.
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Bill 2 23 April 2005 00:29:13 [ permanent link ]
	"MidnightDad" <someone@microsoft.com> wrote in message news:1114109169.ad05dd1efaa6ea9818f095d185d4e983@teranews...> http://www.thenewspaper.com/news/03/343.asp> Scientists Invent Undetectable Speed Detector> Military technology is used to create a visually based speed measurement > device.> University of Florida researchers believe they have outwitted the makers > of radar detectors and other speed detection countermeasures. Using a $5 > million grant from the Air Force, they've developed software that can use > live video camera footage to recognize objects and measure their speed. It > does so by calculating the distance a car moves in a series of photos > compared to a fixed object -- such as a light pole -- in the background. > Because the system is entirely passive, unlike conventional laser and > radar speed guns, it cannot be detected. <snip> Not that I favor automated enforcement, but wouldn't the easiest camera solution be to have a camera record plate of a car at location one, then a mile or so down the road have another camera? The time it takes to get between these two spaced out points of known distance would tell you the average speed. It wouldn't be subject to as much error as trying to figure out speed from a few frames of video looking down a highway.
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Brent P 23 April 2005 00:56:40 [ permanent link ]
	In article <OomdnWy2veFtqfXfRVn-tQ@comcast.com>, James C. Reeves wrote:> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message Wrong. It is electronic, it has some sort of signature that can be>> detected. Not economical to detect at the present time is more accurate.> A video camera leaves a electronic signature that can be detected? Yes. The AM/FM radio on my desk can detect my computer monitor for instance. There is always some sort of EMF or RF coming out of an electric device. Is it economical to detect reliably is the question. Not one of detection.
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Brent P 23 April 2005 00:58:30 [ permanent link ]
	In article <MPG.1cd25662d9c77888989707@newsgroups.bellsouth.net>, Paul wrote:> On Thu, 21 Apr 2005 16:06:02 -0500, Brent P , said the following in > rec.autos.driving... > In article <4267f6fe$0$577$b45e6eb0@senator-bedfellow.mit.edu>, >> John F. Carr wrote:>> The question is not can the government monitor every driver's>> > speed, the question is will the people let the government monitor>> > every driver's speed.>> The government will not make speeding go away until it is no longer >> profitable for them to define the majority of drivers as violators. > At the risk of sounding like judy, that's why I favor jailing speeders. > Make it start costing these towns money instead of making them money and > watch the speed traps dry up. Yes, if the penalty was as high as the troll wants, we would either have no enforcement for people doing reasonable speeds (unless harrassment was the goal), realistic speed limits, or a return to what we have now.
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Bill 2 23 April 2005 02:34:20 [ permanent link ]
	"Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message news:CqGdncrby5qV-PTfRVn-uA@comcast.com...> In article <OomdnWy2veFtqfXfRVn-tQ@comcast.com>, James C. Reeves wrote:>> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message> Wrong. It is electronic, it has some sort of signature that can be>>> detected. Not economical to detect at the present time is more accurate.>> A video camera leaves a electronic signature that can be detected?> Yes. The AM/FM radio on my desk can detect my computer monitor for> instance. There is always some sort of EMF or RF coming out of an> electric device. Is it economical to detect reliably is the question. Not> one of detection. Problem is yet it might pick up the camera, but could it distinguish it from other EMF or RF sources? Other cars I'm sure put out EMF / RF of their own. You would end up with false alarms galore.
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Paul 23 April 2005 03:59:58 [ permanent link ]
	On Fri, 22 Apr 2005 15:58:30 -0500, Brent P , said the following in rec.autos.driving... In article <MPG.1cd25662d9c77888989707@newsgroups.bellsouth.net>, Paul wrote: <snip> At the risk of sounding like judy, that's why I favor jailing speeders. > > Make it start costing these towns money instead of making them money and > > watch the speed traps dry up. > Yes, if the penalty was as high as the troll wants, we would either have > no enforcement for people doing reasonable speeds (unless harrassment was > the goal), realistic speed limits, or a return to what we have now. Exactly my point. Take the profit motive out of traffic enforcement and then the cops would have time for the really dangerous people out there both on the road and off.
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Jim Yanik 23 April 2005 05:01:06 [ permanent link ]
	"Bill 2" <asdf@asdf.com> wrote in news:MZeae.18264$Ln.855820@ursa-nb00s0.nbnet.nb.ca: "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message > news:CqGdncrby5qV-PTfRVn-uA@comcast.com...>> In article <OomdnWy2veFtqfXfRVn-tQ@comcast.com>, James C. Reeves>> wrote: >>> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message>> Wrong. It is electronic, it has some sort of signature that can be>>>> detected. Not economical to detect at the present time is more>>>> accurate. >>> A video camera leaves a electronic signature that can be detected?>> Yes. The AM/FM radio on my desk can detect my computer monitor for>> instance. There is always some sort of EMF or RF coming out of an>> electric device. Is it economical to detect reliably is the question.>> Not one of detection.> Problem is yet it might pick up the camera, but could it distinguish> it from other EMF or RF sources? Other cars I'm sure put out EMF / RF> of their own. You would end up with false alarms galore. > The detection range would not be useful,either. -- Jim Yanik jyanik at kua.net
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Brent P 23 April 2005 05:40:46 [ permanent link ]
	In article <MZeae.18264$Ln.855820@ursa-nb00s0.nbnet.nb.ca>, Bill 2 wrote:> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message > news:CqGdncrby5qV-PTfRVn-uA@comcast.com...>> In article <OomdnWy2veFtqfXfRVn-tQ@comcast.com>, James C. Reeves wrote:>>> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message>> Wrong. It is electronic, it has some sort of signature that can be>>>> detected. Not economical to detect at the present time is more accurate.>>> A video camera leaves a electronic signature that can be detected?>> Yes. The AM/FM radio on my desk can detect my computer monitor for>> instance. There is always some sort of EMF or RF coming out of an>> electric device. Is it economical to detect reliably is the question. Not>> one of detection.> Problem is yet it might pick up the camera, but could it distinguish it from > other EMF or RF sources? Other cars I'm sure put out EMF / RF of their own. > You would end up with false alarms galore. That's where the expensive and yet parts come in.
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Ashton Crusher 23 April 2005 22:55:52 [ permanent link ]
	On Fri, 22 Apr 2005 13:44:50 -0400, Paul <kretp@tmy.now> wrote: On 22 Apr 2005 14:48:53 GMT, Jim Yanik , said the following in >rec.autos.driving... > "James C. Reeves" <jcnospam@nospam.com> wrote in>> news:LsGdnUE8kN9aqfXfRVn-qw@comcast.com: >> This isn't new. Cops here have been using helicopters with observers>> > that measure time a vehicle passes between two painted lines of known>> > distance to measure speed for decades.>> VASCAR. A computer in a police car that measures the distance between two >> points the officer enters into it by a switch,and then measures the time >> that a vehicle takes to pass between the two distance points,also clicked >> into the computer by the officer,it's been around a very long time.> And just like aerial speed enforcement, it is highly subject to the >honesty of the cop operating the system; and with the police and local >government having a financial stake in speed enforcement, that cop's >honesty and integrity are highly suspect, IMO. This new video system is not likely to have that problem. All it seems to be is simply knowing the frame rate, having the math needed to do pattern identification so it can "see" the car and identify it in each frame, and then calculating how much it moves from one frame to the next. If you know the geometry of everything's location you can calculate the speed of the moving object, the car. You'd have to have a very accurate clock to control the frame rate, be able to accurately id the edge/center/some point on the car, etc to make it accurate enough for enforcement because you would only be doing the measuring over a very very short distance, so very small errors in measurement of the inputs would make the output inaccurate. If this was done here in AZ in the summer when the air is so hot it distorts the view of what you see from the heat waves and literally can make things seem to shimmer, that kind of shimmer could completely screw up the measurement. If you could do the measurement 100 times you might be able to average it out, but if you only have a couple frames to do the measuring in it's going to be hard to do. The "shimmer" might introduce a 10% error of it's own. Not likely to be good enough in court. Like most of these things, I suspect the announcement of this "research" greatly hypes their actual success at accomplishing their goal. -- New service to compete with paypal Get $25 pre-registration bonus by following this link www.greenzap.com/25smackers4u
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Jim Yanik 24 April 2005 04:10:29 [ permanent link ]
	Ashton Crusher <Hello@nowhere.net> wrote in news:816l61dnpm58lf3mv0ua3v2nbhvsvbtb9o@4ax.com: On Fri, 22 Apr 2005 13:44:50 -0400, Paul <kretp@tmy.now> wrote:> On 22 Apr 2005 14:48:53 GMT, Jim Yanik , said the following in >>rec.autos.driving... >> "James C. Reeves" <jcnospam@nospam.com> wrote in>>> news:LsGdnUE8kN9aqfXfRVn-qw@comcast.com: >>> This isn't new. Cops here have been using helicopters with>>> > observers that measure time a vehicle passes between two painted>>> > lines of known distance to measure speed for decades.>>> VASCAR. A computer in a police car that measures the distance>>> between two >>> points the officer enters into it by a switch,and then measures the>>> time that a vehicle takes to pass between the two distance>>> points,also clicked into the computer by the officer,it's been>>> around a very long time. >> And just like aerial speed enforcement, it is highly subject to the >>honesty of the cop operating the system; Yes,if the officer clicks the stopwatch or VASCAR trigger switch a bit too soon or too late,it introduces an error;not a consistant one,either. and with the police and local>>government having a financial stake in speed enforcement, that cop's >>honesty and integrity are highly suspect, IMO. > This new video system is not likely to have that problem. All it> seems to be is simply knowing the frame rate, having the math needed> to do pattern identification so it can "see" the car and identify it> in each frame, and then calculating how much it moves from one frame> to the next. If you know the geometry of everything's location you> can calculate the speed of the moving object, the car. You'd have to> have a very accurate clock to control the frame rate, be able to> accurately id the edge/center/some point on the car, etc to make it> accurate enough for enforcement because you would only be doing the> measuring over a very very short distance, so very small errors in> measurement of the inputs would make the output inaccurate. If this> was done here in AZ in the summer when the air is so hot it distorts> the view of what you see from the heat waves and literally can make> things seem to shimmer, that kind of shimmer could completely screw up> the measurement. If you could do the measurement 100 times you might> be able to average it out, but if you only have a couple frames to do> the measuring in it's going to be hard to do. The "shimmer" might> introduce a 10% error of it's own. Not likely to be good enough in> court. and then it has to ID the car;by reading it's plate? -- Jim Yanik jyanik at kua.net
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Matthew Russotto 25 April 2005 19:19:33 [ permanent link ]
	In article <MZeae.18264$Ln.855820@ursa-nb00s0.nbnet.nb.ca>, Bill 2 <asdf@asdf.com> wrote:> "Brent P" <tetraethylleadREMOVETHIS@yahoo.com> wrote in message >news:CqGdncrby5qV-PTfRVn-uA@comcast.com...> Problem is yet it might pick up the camera, but could it distinguish it from >other EMF or RF sources? Other cars I'm sure put out EMF / RF of their own. >You would end up with false alarms galore. It's possible to distinguish between cameras and cars. More difficult would be cameras and displays in cars, but still possible with today's DSP technology. -- There's no such thing as a free lunch, but certain accounting practices can result in a fully-depreciated one.
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Scientists Invent Undetectable Speed Detector

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