4K-X 6mm uneven focus
- Thread starter JPmedia
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I guess you are stuck then unless you upgrade NVR or throw a SD card in the camera and record at a higher bitrate for an incident.
General rule of thumb is
2MP - 4096
4MP - 8192
8MP - 12,288
And then for the field of view adjust it up and down until you don't see an appreciable change.
Too low bitrate and the image gets soft.
Too high a bitrate and the image can get oversharp, especially on the 8MP, and it takes more storage.
And downrezing the camera to say 4MP usually results in a poorer image than a native 4MP resolution camera.
General rule of thumb is
2MP - 4096
4MP - 8192
8MP - 12,288
And then for the field of view adjust it up and down until you don't see an appreciable change.
Too low bitrate and the image gets soft.
Too high a bitrate and the image can get oversharp, especially on the 8MP, and it takes more storage.
And downrezing the camera to say 4MP usually results in a poorer image than a native 4MP resolution camera.
bigredfish
Known around here
I'm running 16,384
Each scene is different. I fight the noise you see as well on another 4K-X camera. Have countless hours in it and still fighting it.
I call 'em sparklies
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bigredfish
Known around here
What is your FW version on the 4K-X?
I use these settings at night on the bullet I showed you between the houses targeting the street. (2021 FW- better IMHO)
I can't run these same settings on the other bullet. (2024 FW- much worse. Looking at reverting back to 2021 FW - but it wont let me.
DONT UPDATE FW )
I use these settings at night on the bullet I showed you between the houses targeting the street. (2021 FW- better IMHO)
I can't run these same settings on the other bullet. (2024 FW- much worse. Looking at reverting back to 2021 FW - but it wont let me.
DONT UPDATE FW )
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Ok, so I did some adjustments. In my case, anything above a gain setting of 30 introduces noise and goes up considerably as the gain gets past 34-35. So, I've cut the gain to 30 and had to lower the shutter to 1/30th to get an image that wasn't full of noise. It's darker than I would like, but there is very little light on this side and it will serve useful as an overview/recognize camera - which was the intention from the beginning. The goal is to recognize the type of vehicle and color and observe people passing through. I totally forgot about the new PTZ I purchased from Andy, It will be behind this camera, 5 - 6 feet higher and running IR and auto tracking
Attachments
Ok, just to give you an idea what the old Lorex camera looked like at this location. Yes, the FOV is different between the two, but I still think it's a good comparison of image quality.
The Lorex is an 8mp 1/2.8" sensor running "Shutter Priority" and a shutter range of 0 - 33.33ms. Gain is 0 - 50
The 4K-X is running is manual at 1/30 and gain of 0 - 30
Yeah, the 4K-X looks darker in the distance, but you'll be able to tell what you're looking at in the foreground, which is the ROI here
The Lorex is an 8mp 1/2.8" sensor running "Shutter Priority" and a shutter range of 0 - 33.33ms. Gain is 0 - 50
The 4K-X is running is manual at 1/30 and gain of 0 - 30
Yeah, the 4K-X looks darker in the distance, but you'll be able to tell what you're looking at in the foreground, which is the ROI here
Attachments
That is a great comparison of basically the same settings showing the difference between 8MP on 1/2.8" versus 1/1.2" sensor. We all know that the Lorex at shutter priority was running at the slowest shutter setting you allowed (basically 1/30)
As you go along this journey, you will learn (hopefully) to accept a darker image. The goal is freeze frame motion, not nice bright static image.
For most of us, after a day or two, we get used to the darker image.
Personally I will take a darker image and clean image of the perp than a brighter static image and blur motion of the perp!
As you go along this journey, you will learn (hopefully) to accept a darker image. The goal is freeze frame motion, not nice bright static image.
For most of us, after a day or two, we get used to the darker image.
Personally I will take a darker image and clean image of the perp than a brighter static image and blur motion of the perp!
bigredfish
Known around here
1/30 is going to give you a blurry blob on any but the slowest of motion at night....the white LEDs wil help to an extent, in the center of the image
You need to start testing by walking back and forth at a normal pace in the scene and capture the video and freeze frames.
Without video its just an exercise without meaning at this point
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bigredfish
Known around here
Don't update it. 2024 is heavily oversharpened and noisier
Unfortunately, I don't think there isn't enough light to run a faster shutter speed without introducing noise from the gain function. Otherwise, I'm back to the noisy image I showed previously.
biggen
Known around here
- May 6, 2018
- 2,792
- 3,201
If thats the case, then this isn't the right camera for this location. Sounds like you need a camera that emits IR. The 4K-T/X are great cameras for low light but they do need some light to function.
Having to run it at 1/30 is too large a sacrifice. You won't be able to identify anyone in motion at that shutter speed as @bigredfish suggested. It sounds like this location would have benefited from a T54IR (the old 5442 before it was renamed).
I think everyone missed this previous reply:
Ok, so I did some adjustments. In my case, anything above a gain setting of 30 introduces noise and goes up considerably as the gain gets past 34-35. So, I've cut the gain to 30 and had to lower the shutter to 1/30th to get an image that wasn't full of noise. It's darker than I would like, but there is very little light on this side and it will serve useful as an overview/recognize camera - which was the intention from the beginning. The goal is to recognize the type of vehicle and COLOR and observe people passing through. I totally forgot about the new PTZ I purchased from Andy, it will be behind this camera, 5 - 6 feet higher and running IR and auto tracking
Ok, so I did some adjustments. In my case, anything above a gain setting of 30 introduces noise and goes up considerably as the gain gets past 34-35. So, I've cut the gain to 30 and had to lower the shutter to 1/30th to get an image that wasn't full of noise. It's darker than I would like, but there is very little light on this side and it will serve useful as an overview/recognize camera - which was the intention from the beginning. The goal is to recognize the type of vehicle and COLOR and observe people passing through. I totally forgot about the new PTZ I purchased from Andy, it will be behind this camera, 5 - 6 feet higher and running IR and auto tracking
bigredfish
Known around here
It takes me hours multiple days to dial in a camera in a scene at night. The 4Ks take twice that long and months later I usually start all over 
biggen
Known around here
- May 6, 2018
- 2,792
- 3,201
The goal is to recognize the type of vehicle and COLOR and observe people passing through. I totally forgot about the new PTZ I purchased from Andy, it will be behind this camera, 5 - 6 feet higher and running IR and auto tracking
No, I actually saw this. But identifying the make of a car at a 1/30 shutter will be much harder that trying to identify a person running. The car will be moving faster and will have even more motion blur than a person.
Anyway, keep playing around with it. It takes me a long time as well to dial it it properly.
No, I actually saw this. But identifying the make of a car at a 1/30 shutter will be much harder that trying to identify a person running. The car will be moving faster and will have even more motion blur than a person.
Anyway, keep playing around with it. It takes me a long time as well to dial it it properly.