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Hikvision LPR DeepInView DS-2CD7A26G0-IZ(H)S

coney27

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For the last month or so I've been playing around and tweaking my new DS-2CD7A26G0-IZ(H)S. I've installed it in a tree nearby the roadway and it seems to be functioning well. I'm extremely pleased with my daytime captures but unfortunately my nighttime captures are poor. I'm interested to see if anyone has the same camera, or a similar Hikvison, and would be willing to share their capture settings. I'll also be posting a review of the camera and my set up once I get the settings dialed in.

Here are just two samples from my daytime captures




Video:



 
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bigredfish

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I'm not familiar with HiK cameras, I run 2 Dahua 5231 Z12's but here are some basic thoughts:

1- Bitrate is too low. Bump to at least 4096. I run 6144-8192. Also try CBR- Works better for me
2- Match iframe to fps.
3- More zoom will help. An LPR camera ideally only covers about the width to 2x the width of the car. You're trying to do too much with one camera
4- You'll need to use HLC at night to fight the headlights and tailights
5- You could use a bit more noise reduction at night (30-40)
6- Typically different exposure and other settings day vs night Does that camera allow separate day/night settings?

I think you have enough IR, but ideally at night the head/tail lights are just specs. May need to drop to 1/2000 exp.

See examples
 

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coney27

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Yes the camera allows for different day night settings. I'll take your advice into account and report back. Thanks
 

bigredfish

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You know, after watching those again with coffee, you may indeed be able to pull off that long FOV and still get plates. Try playing with those night settings to reduce the flare of the head/tail lights and up the bitrate. You should be fine with 30 FPS btw, many use less.
 

coney27

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Update:

Based upon @bigredfish suggestions I changed a few settings on my LPR including the bitrate, HCL, frame rate and exposure. Happy to say the results are drastically improved to the point where LPR is now automatically detecting and reading and logging plates in complete darkness. I still believe I can get clearer results and will still change some setting around until I am 100% satisfied. Below are just two videos from over night where both plates are easily identified and read by the LPR without human intervention. Thanks @bigredfish.

Still looking for anyone out there that is using this Hikvision or a similar one to compare results.....


 

bigredfish

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Excellent! Glad those tips helped.

I think zoom may be your biggest challenge now.
 
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Miles

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Dropbox - DriveClips - Simplify your life

Cameras upload via FTP. FTP folders are inside of Dropbox folders.
Dropbox - You're invited to join Dropbox!

Changed IR from scheduled switch to auto after watching this video - hope it works good with the latest firmware. Edit: Scheduled Switch set to 5 seconds would go back and fourth between IR on and off. Setting Filtering Time to 120 seconds got it to switch back and forth only once or twice. Seems like they need an even longer Filtering Time setting or some sort of lockout for 5 minutes after the first switch from IR off to IR on. No harm in IR being on any time anyway. Camera says time to flip IR on but then once it's on it will switch it off again at least once, at this time, with Filter Time maxed at 120 seconds - 19-10-19 - another edit after the willingness to monitor the equipment working. I'd like to think it may just be the older model ANPR camera but that would make it even more like my posts don't belong in this thread. My poor old 4 line cameras... Where are the separate Image Settings in the DeepInView GUI? These 2 cameras do have some significant differences if I'm not mistaken. Adds even more to a question, did I even read the OP title, sheesh

https://www.youtube.com/watch?v=IJfKef-IbwE

2019-09-23 Edit
Latest firmware adds most obvious, Smart Events and other improvements.
Cause of experience with Dahua cameras in use here getting email working - went straight to gmail (app/device) specific passwords.
 

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Miles

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The rest of the setup pages - as I have it. Right or wrong...? No, just as is. Setup bias toward LPR works with as much else visible as possible. For instance - narrow grey scale, lowered contrast and slow exposure. The camera could be setup toward more vividly capturing only the plate after sundown. PS - WDR as I am using it, does not work in low light so I'm changing the manual switch times. Morning time the IR is off before the image settings switch from night back to day and there is a huge difference in illumination between a wet rainy morning and a sunny morning. So unless I'm watching the video stream 24/7 (and I don't) I'm settling with day image settings a little shorter duration so it switches to night setting a little earlier and day setting a littler later than needed on most days. I do want to get it to a set it and forget but with DST changes, well - I don't know. As it is I end up stumbling on the image in light to low for WDR by accident. I find the image blinking like it cant find some balance so it goes hey wire trying blinking every couple of seconds. EDIT:19/10/09 - Starting to lean towards IR on/off right around sunset and sunrise with night time image setting duration set to be enabled a little before IR on and a little later than IR off. goal being that it's light enough for WDR which is enabled in the day image settings.
 

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Miles

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I dont understand your post @Miles. Are you asking a question?
I'm sharing both near real time uploads from the HikLPR cameras and along with that how it is that the cameras are setup. You see the results of the setup using the dropbox link. I thought it would be informative and of interest on this forum. My experience is yours as well - trial and error galore. There has been a recent firmware release that added a few new features making the LPR function better and adding Smart Events. I believe Smart Events along with Motion Detection only work when your not using the camera as an LPR camera. The latest firmware adds a much wider range of functionality to the hardware. Does that make my post more understandable?
 
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coney27

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Yes it does. Thank you. Looks like your getting great results with the 4 series. And yes I believe you are correct. You can only use either road detection or smart events at one time. Not both at the same time.
 

Miles

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Yes it does. Thank you. Looks like your getting great results with the 4 series. And yes I believe you are correct. You can only use either road detection or smart events at one time. Not both at the same time.
I had not paid any attention to the "series" of camera, just that it was an LPR camera. Are the 4 series newer or older then the DeepInView cameras? The ones in use here are of the Dark Fighter line.
 

coney27

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The DeepinView are the newest "smart" cameras that Hik makes. From the Hik website "The Hikvision DS-2CD7A65G0-IZHS/8 DeepinView Outdoor Varifocal Network Dome Camera includes deep learning technology for human, vehicle, and face detection. It supports H.265+ video compression, which assures savings in bandwidth and storage. Darkfighter technology allows for viewing and recording in ultra low-light conditions."

Mine is also a Darkfighter with a 1/1.8 sensor. 2 MP Outdoor Varifocal Bullet Network Camera
 

Miles

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The DeepinView are the newest "smart" cameras that Hik makes. From the Hik website "The Hikvision DS-2CD7A65G0-IZHS/8 DeepinView Outdoor Varifocal Network Dome Camera includes deep learning technology for human, vehicle, and face detection. It supports H.265+ video compression, which assures savings in bandwidth and storage. Darkfighter technology allows for viewing and recording in ultra low-light conditions."

Mine is also a Darkfighter with a 1/1.8 sensor. 2 MP Outdoor Varifocal Bullet Network Camera
So my cameras are getting dated it seems. 4 series to DS-2CD7xxx. Interesting. I never have had much luck with Hik PC-NVR software but based on the use of the cameras here the Hik WDR is better than Dahua. These 2 HikLPR cams are recording to the onboard SD cards 24/7. Of a mind to glance around at newer Hik model cameras now. Thanks.
PS - I wonder if the shorter visor improves reflections from head lamps?? I'm getting allot of that in the after sundown LPR captures.
 

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coney27

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I would assume with better technology and better mechanical parts like the 1/1.8 sensor you will get better plate grabs. As for the visor no that wont affect the camera that much. You might have to fool around with your HCL, WDR and exposure settings.
 

Miles

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I would assume with better technology and better mechanical parts like the 1/1.8 sensor you will get better plate grabs. As for the visor no that wont affect the camera that much. You might have to fool around with your HCL, WDR and exposure settings.
Newer is better. Looks like newer in this case comes with a much wider range of functionality.
I am of a mind that is, less is more when it comes to post sundown plate grabs. Only recently did I set the Noise Reduction Level to max recommended range for this LPR camera. At this time I'm thinking leave well enough alone. Always have had a mind set that is to get the device doing what I want while using as little of its computing resources as possible. Maybe that's a dated mind set?
 

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coney27

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Yes I would agree. It uses Hikvision's AI algorithms. I'm very satisfied with mine.
 
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