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Is this "normal" for IP Cameras ? People during daylight, Ghosts at dusk.

PICam

n3wb
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Hello,
I have a few 5MP IP cameras (H265/H265+) and the image is fine during broad daylight. I'm concerned about the moving objects/persons, this movement should be captured clearly in order to recognize the person (face). The camera should capture video/motion without IR night vision.
When there is a bit less light things start to look spooky. The static background still looks fine and sharp but the moving object/persons become blurry, grainy and a bit transparent. The persons/objects do not move fast. It's just people walking by or my hand waving slowly in front of the camera (see attached picture).
I have also attached camera info and settings. This is the "best" setting I could get.

Camera: 3516EV300 + Sony IMX335
It is recognized by HIKVision device manager but the firmware is provided by XM. :rolleyes: I already flashed the latest version provided on the XM (Chinese) site.

I also had blurry smudged moving objects with some other cameras. I thought a Sony IMX335 sensor would provide clear sharp (moving) object.

I tried different settings/combinations with no success. Its a wired LAN IP camera, no bandwidth issues.

Anybody, please help?

Thanks
 

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bp2008

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The blurring is most likely due to the shutter speed being too long. 3D noise reduction or WDR features may also contribute to motion blur, but primarily it is the exposure time. There is no way it is using a 0.1ms - 0.2ms exposure as suggested by the screenshot, because that would be an exposure time of 1/500 to 1/1000 second, and your hand would not be blurred like that.

Also, an "I Frame Interval" of 1 is way too low if that means every frame is an iframe. If it means there is 1 second between iframes, then that is probably okay.
 

PICam

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Thanks for your feedback.... about the I Frame,..with this setting I am getting a FPS/Key in Blue Iris of 15/1 meaning 15 fps / 1 key frame per second. (as suggested by BI help file). According the last part of your comment, I think it's fine.
The shutter speed is a strange thing because if it is too long why does the motion during daylight look perfectly sharp?
I don't know what triggers the camera to use another shutter speed when there is a bit less light. I also tried to set the time to noon to try to fool the camera into not adjusting the shutter speed. No luck.

But,..other IP Cams do not have this phenomenon when there is a bit less light? The key thing here is the motion,..this should be sharp.

Thanks
 

bp2008

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Most cameras have smarter automatic settings. Right now I'm not sure how you are even supposed to configure the exposure time on your camera. But yes, it is normal for daytime exposure to speed up a lot (otherwise everything would be washed out).
 

TL1096r

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Most cameras have smarter automatic settings. Right now I'm not sure how you are even supposed to configure the exposure time on your camera. But yes, it is normal for daytime exposure to speed up a lot (otherwise everything would be washed out).
My dahua 4k (you have the same one) has motion blur at night. What settings do you use to avoid this?
 

alastairstevenson

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I thought a Sony IMX335 sensor would provide clear sharp (moving) object.
Guessing a bit here ...
Looking at the specs - it's not that low-light a sensor, even though it's back-illuminated.
It's quite a small size at 1/2.8" for 5MP, giving small 2um pixels so quite a low (500mV) sensitivity.
Other camera specs using this are quoting 0.01Lux minimum illumination, which is comparable to a 1/3" 3MP sensor.

It looks like you've constrained the exposure to 100mS shortest - maybe try reducing that and turning AGC on.
 

TL1096r

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I use tons of IR light ;)

If I had a problem with motion blur at night, then I would change the exposure setting to a custom range between 0-16 or 0-33ms or so.
Thank you as always for sharing your knowledge.

What IR have you been using. I was going to give this a try but doesn't seem too waterproof:
 

PICam

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I have seen comparison videos on youtube of different sensors, including the IMX335 and it looks perfectly at night....but this is in a dash cam. No blurring at night even of fast moving vehicles.
I guess compression in IP cams play a role but I did not expect such blurred motions.

There are preset values for shutter speed, being 1/50 the slowest. But way too fast for dusk conditions. That manual value of 0.1 is the lowest it will go. Other values do not seem to have much effect.

But which IP camera does provide sharp clear images of moving objects in lower light conditions?
 
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