ONVIF - Only Certain Areas & Alert Types
- Thread starter mbh
- Start date
In terms of getting the most out of the camera, here is my "standard" post that many use as a start for dialing in day and night that helps get the clean captures and help the camera AI recognize people and cars.
Start with:
H264
8192 bitrate
CBR
15FPS
15 iframes
Every field of view is different, but I have found you need contrast to usually be 6-8 higher than the brightness number at night.
We want the ability to freeze frame capture a clean image from the video at night, and that is only done with a shutter of 1/60 or faster. At night, default/auto may be on 1/12s shutter or worse to make the image bright.
In my opinion, shutter (exposure) and gain are the two most important parameters and then base the others off of it. Shutter is more important than FPS. It is the shutter speed that prevents motion blur, not FPS. 15 FPS is more than enough for surveillance cameras as we are not producing Hollywood movies. Match iframes to FPS. 15FPS is all that is usually needed.
Many people do not realize there is manual shutter that lets you adjust shutter and gain and a shutter priority that only lets you adjust shutter speed but not gain. The higher the gain, the bigger the noise and see-through ghosting start to appear because the noise is amplified. Most people select shutter priority and run a faster shutter than they should because it is likely being done at 100 gain, so it is actually defeating their purpose of a faster shutter.
Go into shutter settings and change to manual shutter and start with custom shutter as ms and change to 0-8.3ms and gain 0-50 (night) and 0-4ms exposure and 0-30 gain (day)for starters. Auto could have a shutter speed of 100ms or more with a gain at 100 and shutter priority could result in gain up at 100 which will contribute to significant ghosting and that blinding white you will get from the infrared or white light.
Now what you will notice immediately at night is that your image gets A LOT darker. That faster the shutter, the more light that is needed. But it is a balance. The nice bright night static image results in Casper blur and ghost during motion LOL. What do we want, a nice static image or a clean image when there is motion introduced to the scene?
In the daytime, if it is still too bright, then drop the 4ms down to 3ms then 2ms, etc. You have to play with it for your field of view.
Then at night, if it is too dark, then start adding ms to the time. Go to 10ms, 12ms, etc. until you find what you feel is acceptable as an image. Then have someone walk around and see if you can get a clean shot. Try not to go above 16.67ms (but certainly not above 30ms) as that tends to be the point where blur starts to occur. Conversely, if it is still bright, then drop down in time to get a faster shutter.
You can also adjust brightness and contrast to improve the image. But try not to go above 70 for anything and try to have contrast be at least 7-10 digits higher than brightness.
You can also add some gain to brighten the image - but the higher the gain, the more ghosting you get. Some cameras can go to 70 or so before it is an issue and some can't go over 50.
But adjusting those two settings will have the biggest impact. The next one is noise reduction. Want to keep that as low as possible. Depending on the amount of light you have, you might be able to get down to 40 or so at night (again camera dependent) and 20-30 during the day, but take it as low as you can before it gets too noisy. Again this one is a balance as well. Too smooth and no noise can result in soft images and contribute to blur.
Do not use backlight features until you have exhausted every other parameter setting. And if you do have to use backlight, take it down as low as possible.
After every setting adjustment, have someone walk around outside and see if you can freeze-frame to get a clean image. If not, keep changing until you do. Clean motion pictures are what we are after, not a clean static image.
Start with:
H264
8192 bitrate
CBR
15FPS
15 iframes
Every field of view is different, but I have found you need contrast to usually be 6-8 higher than the brightness number at night.
We want the ability to freeze frame capture a clean image from the video at night, and that is only done with a shutter of 1/60 or faster. At night, default/auto may be on 1/12s shutter or worse to make the image bright.
In my opinion, shutter (exposure) and gain are the two most important parameters and then base the others off of it. Shutter is more important than FPS. It is the shutter speed that prevents motion blur, not FPS. 15 FPS is more than enough for surveillance cameras as we are not producing Hollywood movies. Match iframes to FPS. 15FPS is all that is usually needed.
Many people do not realize there is manual shutter that lets you adjust shutter and gain and a shutter priority that only lets you adjust shutter speed but not gain. The higher the gain, the bigger the noise and see-through ghosting start to appear because the noise is amplified. Most people select shutter priority and run a faster shutter than they should because it is likely being done at 100 gain, so it is actually defeating their purpose of a faster shutter.
Go into shutter settings and change to manual shutter and start with custom shutter as ms and change to 0-8.3ms and gain 0-50 (night) and 0-4ms exposure and 0-30 gain (day)for starters. Auto could have a shutter speed of 100ms or more with a gain at 100 and shutter priority could result in gain up at 100 which will contribute to significant ghosting and that blinding white you will get from the infrared or white light.
Now what you will notice immediately at night is that your image gets A LOT darker. That faster the shutter, the more light that is needed. But it is a balance. The nice bright night static image results in Casper blur and ghost during motion LOL. What do we want, a nice static image or a clean image when there is motion introduced to the scene?
In the daytime, if it is still too bright, then drop the 4ms down to 3ms then 2ms, etc. You have to play with it for your field of view.
Then at night, if it is too dark, then start adding ms to the time. Go to 10ms, 12ms, etc. until you find what you feel is acceptable as an image. Then have someone walk around and see if you can get a clean shot. Try not to go above 16.67ms (but certainly not above 30ms) as that tends to be the point where blur starts to occur. Conversely, if it is still bright, then drop down in time to get a faster shutter.
You can also adjust brightness and contrast to improve the image. But try not to go above 70 for anything and try to have contrast be at least 7-10 digits higher than brightness.
You can also add some gain to brighten the image - but the higher the gain, the more ghosting you get. Some cameras can go to 70 or so before it is an issue and some can't go over 50.
But adjusting those two settings will have the biggest impact. The next one is noise reduction. Want to keep that as low as possible. Depending on the amount of light you have, you might be able to get down to 40 or so at night (again camera dependent) and 20-30 during the day, but take it as low as you can before it gets too noisy. Again this one is a balance as well. Too smooth and no noise can result in soft images and contribute to blur.
Do not use backlight features until you have exhausted every other parameter setting. And if you do have to use backlight, take it down as low as possible.
After every setting adjustment, have someone walk around outside and see if you can freeze-frame to get a clean image. If not, keep changing until you do. Clean motion pictures are what we are after, not a clean static image.
Here is my question, someon previously told me to turn off all Video Detection and Smart Motion Detection, I feel with that off, nothing works. Am I missing something?
I am not sure, so I will go turn them off, and then do the find. I have guys working in the back yard moving all around so this is the ideal time to to let. Thank you for all your help so far!
I did everything, I am getting a line detector ONVIF but no people. The reason I only want people notifications is, that are trees and the shadows will create motion triggers.
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Using IVS without MD/SMD will only trigger for human and/or vehicle depending on if you choose both or only one. You may get that rare bird or cat that triggers, but not often.
The line detection is correct. You need to go into configure in BI for the ONVIF/camera and change memo to person if you want it to say person instead of line detection.
The line detection is correct. You need to go into configure in BI for the ONVIF/camera and change memo to person if you want it to say person instead of line detection.
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So in order to get person detection I need to use MD/SMD?
Or would it be best to set IVS trigger than use AI to confirm person and only trigger then?
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looney2ns
IPCT Contributor
You have to think in 3d, when drawing tripwires. Yours are drawn too high off the ground.
You want them at a height that will roughly coincide with the height of peoples waist.
You want them at a height that will roughly coincide with the height of peoples waist.
Honestly, it seems ONVIF does not have the capability I am looking for, or the 5442 cameras cant do what I want. I need it to only alert for people or vehicles where I specify.
So lets make this very easy, can ONVIF on 5442 cameras, just alert to people and cars?
So lets make this very easy, can ONVIF on 5442 cameras, just alert to people and cars?
YES.
It is EXACTLY what I am doing, as well as many here.
My cameras ONLY alert when a person and or car, depending on the camera, is triggered by ONVIF.
Have you taken the camera off default/auto settings as I suggested?
Have you tried an intrusion box?
It is EXACTLY what I am doing, as well as many here.
My cameras ONLY alert when a person and or car, depending on the camera, is triggered by ONVIF.
Have you taken the camera off default/auto settings as I suggested?
Have you tried an intrusion box?
Yes, I legit did every single thing thing, I even changed from 265 to 264!
It says line detection, but as you can see I have it for people only.
Well I just realized, I did not do it to every camera yet, but I have some tall grass they are installing and when the wind blows it was activating the looking back camera. I just changed it to be exactly like the photos I uploaded let me see if that helps
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biggen
Known around here
- May 6, 2018
- 2,732
- 3,131
Yes. I wouldnt own them if they couldn’t. I use one exclusively for alerting me to people walking onto my driveway.
