Guest Dan_Glebals Posted November 21, 2003 Share Posted November 21, 2003 I have an installation that monitors gates to a private estate. The mono camera facing the gate views the whole of the gate opening to give image of vehicle and occupants. There is also a mono camera on the same post monitoring the approach to exit the gate. The problem that I am faced with is that at night the glare from the vehicle lights makes the number plate unrecognisable. If you train the camera on just the number plate you can read it fine but the vehicles/ number plates are never in the same position so on a fixed camera installation such as this is useless. I have contemplated the use of IR lamps but past experience has resulted in the number plates reflecting a bright glare also IR lamps are not cheap. I wondered that if installing IR lamps would be enough to drown the glare of headlights. Any thoughts appreciated. Haydn Richmond Electronic Security Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/ Share on other sites More sharing options...
Guest barrymung Posted November 23, 2003 Share Posted November 23, 2003 Dunno the solution but notice that a lot of Prisons and Army camps etc on the telly have a "Please switch off your headlights" notice. Presumably they have the same problem with reading numberplates. Is it possible to place a (Hidden) camera behind any vehicles that pull up to the gate, so that the rear plate can be seen? Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-4790 Share on other sites More sharing options...
morph Posted November 24, 2003 Share Posted November 24, 2003 You could just fit a "Peak White Inverter" it eliminates highlights that cause auto iris lenses to stop down (eg. torches, car headlamps) by converting the highlights to a preset grey level. The grey level and the brightness threshold are fully adjustable. Molynx Bewator do them. Colin. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-4812 Share on other sites More sharing options...
Guest Andyp Posted November 25, 2003 Share Posted November 25, 2003 Panasonic have a number of cameras that deal with this problem effectively. The 830 (which I think may be obsolete) or the 920 range. They arent cheap but are really good at dealing with glare. I think the CCD (chip) was known as the FIT chip. (Frame Interline Transfer). It works (from memory) by building the picture up in a slightly different manner. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-4855 Share on other sites More sharing options...
Guest Andyp Posted November 25, 2003 Share Posted November 25, 2003 Also the use of IR lamps with a correctly chosen filter should provide a usable image of the plate. Similar technology is used in ANPR cameras (Automatic Number Plate Recognition) but is expensive and a bit over the top. You could always restrict the width of the entrance and provide a narrow field of view so that very little of the headlights are in frame. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-4857 Share on other sites More sharing options...
Guest keith Posted January 4, 2004 Share Posted January 4, 2004 I would recomend the installation of a peak white inverter. I have used them many times with success. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-5707 Share on other sites More sharing options...
Nova-Security Posted September 5, 2004 Share Posted September 5, 2004 Samsung 720 colour/mono camera, wide dynamic, brilliant camera and copes with reading number plates, installed loads best colour/mono camera on the market i think.. Richard www.nova-security.co.uk www.nsiapproved.co.uk No PMs please unless i know you or you are using this board with your proper name. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-22522 Share on other sites More sharing options...
Guest ALSEC Posted September 6, 2004 Share Posted September 6, 2004 Dunno the solution but notice that a lot of Prisons and Army camps etc on the telly have a "Please switch off your headlights" notice. Presumably they have the same problem with reading numberplates.Is it possible to place a (Hidden) camera behind any vehicles that pull up to the gate, so that the rear plate can be seen? 4790[/snapback] The signs tell you to turn off your lights so you don't dazzle the guy on duty! It's been known for non-compliance resulting in an accidentally broken light if you know what I mean!! Link to comment https://www.thesecurityinstaller.co.uk/community/topic/872-viewing-number-plates-at-night/#findComment-22560 Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.