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Dahua 4MP Varifocal Bullet (IPC-HFW5421E-Z)

nayr

nayr

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Jmtyra said:
This is what I would be curious about...also wonder if a RPi 3 would yield a higher FPS (if it's multi-thread enabled)
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I doubt performance will be much greater on a pi3, its not threaded.. but it'll be more reasonable on some existing hardware you may already have running.. but after using Alprd a lil while I think a low traffic driveway might be doable on minimal hardware, the key is the FPS you get in daytime looking for plates (ie no plate in image), running in black and white 24/7 helps alot since its looking for high contrast squares, you dont need to process the same plate more than once really.. if it takes a couple seconds to read the plate thats no big deal because you wont have another vehicle passing that soon in most cases.

Plate detection is pretty reliable, and that alone could be used to trigger some alert/notification even if a read is not that good
 
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ldasilva

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nayr said:
permission granted @n0xlf

glad I got another test plate, the brand new one was way over exposed when I thought settings were good.. the old one been sitting in the sun on my race car for a decade or so, should be a good variation.. trying to find the plates that came on my motorcycle to give you an idea of bike reading abilities too.

mebe i should get a couple europlates too ;)

View attachment 14323
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how far is that? 80 feet?
 
hmjgriffon

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nayr said:
no thats in the middle of the yard, ~40ft
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Was reading up up openalpr last night, the site says you need a commercial license to have it scan video feeds? Did you just take the parts they give away and write the rest to do what you need?
 
Jmtyra

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While we're on the topic of LPR, is the goal to have evidence and/or documentation for the police should something happen? Or is there some other information that could be gathered (legally. as a civilian.) from the LPR data?
 
hmjgriffon

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Jmtyra said:
While we're on the topic of LPR, is the goal to have evidence and/or documentation for the police should something happen? Or is there some other information that could be gathered (legally. as a civilian.) from the LPR data?
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Probably lots of reasons, if something goes down at your house, or another, to may get video of the car and tag. You could also learn things like what cars drive by the most, you could use it to arm and disarm your system or alert you when someone you know is coming. Not sure if you could get access but you could have it constantly cross referencing for stolen cars etc.
 
nayr

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@hmjgriffon the open source version will work with MJPEG streams; the commercial license is required for h264 streams.. this is why its critical to select a camera capable of providing both MJPEG and H264 at the same time.. so you have one stream to record and another to pipe to ALPRD.

@wantafastz28 Tha'd be sweet but dunno if it'll help anything.. Right now im looking for obscure plate types, like motorcycle/european/canadian/australian that either use different size typefaces or completely different typefaces... but I cant keep putting off this test while I gather a small plate collection :p

@Jmtyra the goal for me is documentation for police; I have a LPR camera up and running for the last year.. and in that year I had a drive-by-shooting right infront of my house, but the fucking bastards avoided passing my plate camera and I got nothing (came in from other direction and turned about infront of my house and left same direction).. the police closed the case from lack of evidence, if I had that plate id already sent a coupe punks to pound-me-in-the-ass prison..

A vast majority of shit you capture on camera wont be worth a flying fuck w/out some form of vehicle identification.. Think of how easy it'd be to identify human targets if everyone wore a large reflective nametag on there ass.
 
hmjgriffon

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nayr said:
@hmjgriffon the open source version will work with MJPEG streams; the commercial license is required for h264 streams.. this is why its critical to select a camera capable of providing both MJPEG and H264 at the same time.. so you have one stream to record and another to pipe to ALPRD.

@wantafastz28 Tha'd be sweet but dunno if it'll help anything.. Right now im looking for obscure plate types, like motorcycle/european/canadian/australian that either use different size typefaces or completely different typefaces... but I cant keep putting off this test while I gather a small plate collection :p

@Jmtyra the goal for me is documentation for police; I have a LPR camera up and running for the last year.. and in that year I had a drive-by-shooting right infront of my house, but the fucking bastards avoided passing my plate camera and I got nothing (came in from other direction and turned about infront of my house and left same direction).. the police closed the case from lack of evidence, if I had that plate id already sent a coupe punks to pound-me-in-the-ass prison..

A vast majority of shit you capture on camera wont be worth a flying fuck w/out some form of vehicle identification.. Think of how easy it'd be to identify human targets if everyone wore a large reflective nametag on there ass.
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How would you know, by looking at the specs, if the camera can do mjpeg and h264 at the same time?
 
nayr

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hmjgriffon said:
How would you know, by looking at the specs, if the camera can do mjpeg and h264 at the same time?
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faith? usually if its MJPEG capable it can do both.. its a legacy feature thought thats quickly vanishing... most cheap-o cameras, like the Huisuns and Longse's wont even give you a MJPEG stream at all.. so they cant be used with free version of OpenALPR
 
hmjgriffon

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nayr said:
faith? usually if its MJPEG capable it can do both.. its a legacy feature thought thats quickly vanishing... most cheap-o cameras, like the Huisuns and Longse's wont even give you a MJPEG stream at all.. so they cant be used with free version of OpenALPR
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of course, because being able to use h265 would probably use a lot less resources on the agent lol.
 
nayr

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no, infact i'd use more since it'd have to decompress the stream.. if your trying to process video you cant get easier than MJPEG, as long as your not trying to save it..

the bitrate of my Birdhouse LPR camera is like 25Mbps cranked up to high framerate and quality.. Your local news studio passes all that video arround uncompressed in raw format so they can overlay effects and texts in realtime.. then its compressed to digital formats right before it goes out the transmitter so they arent wasting a bunch of resources decompressing the realtime video.
 
hmjgriffon

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nayr said:
no, infact i'd use more since it'd have to decompress the stream.. if your trying to process video you cant get easier than MJPEG, as long as your not trying to save it..

the bitrate of my Birdhouse LPR camera is like 25Mbps cranked up to high framerate and quality.. Your local news studio passes all that video arround uncompressed in raw format so they can overlay effects and texts in realtime.. then its compressed to digital formats right before it goes out the transmitter so they arent wasting a bunch of resources decompressing the realtime video.
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the more you know, shiiiiing.
 
wantafastz28

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nayr said:
@hmjgriffon the open source version will work with MJPEG streams; the commercial license is required for h264 streams.. this is why its critical to select a camera capable of providing both MJPEG and H264 at the same time.. so you have one stream to record and another to pipe to ALPRD.

@wantafastz28 Tha'd be sweet but dunno if it'll help anything.. Right now im looking for obscure plate types, like motorcycle/european/canadian/australian that either use different size typefaces or completely different typefaces... but I cant keep putting off this test while I gather a small plate collection :p

@Jmtyra the goal for me is documentation for police; I have a LPR camera up and running for the last year.. and in that year I had a drive-by-shooting right infront of my house, but the fucking bastards avoided passing my plate camera and I got nothing (came in from other direction and turned about infront of my house and left same direction).. the police closed the case from lack of evidence, if I had that plate id already sent a coupe punks to pound-me-in-the-ass prison..

A vast majority of shit you capture on camera wont be worth a flying fuck w/out some form of vehicle identification.. Think of how easy it'd be to identify human targets if everyone wore a large reflective nametag on there ass.
Click to expand...
Gotcha, this one is on its way to the trash, wasn't sure if it would benefit ya.
 

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Arjun

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Does the zoom need to be preset? Or does the varifocal automatically zoom in any time it sees a vehicle approaching?
 
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