- Sep 5, 2015
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Well, I have adjusted one of my security lights to hopefully light up that area a little bit more. Yes, you can adjust the gain. I have not seen the others listed as that. Axis may call it something else. I will look into it.
Go to image- exposure- and adjust the max gain to 63 (I'm pretty sure that's the default). That will brighten up the image a little but you will need to adjust additional settings. You can adjust the Blur-Noise tradeoff slider to less noise in small increments to see if that reduces the noise in the image but that may cause more motion blur.
If your sharpness is set to 100 that's too high and can introduce noise. What was the reason for changing the sharpness from the default settings?
I recommend using either the "forensic" or "Vivid" scene profiles at the default state until you fine tune the camera. I think you're adjusting too many settings at once without verifying if the adjustments are hurting or helping the image quality.
Go to video- image and select Overlays. Add a text overlay and type in "#B" without the quotation marks. This will display the current bitrate on the camera live feed. I recommend doing this while you're fine tuning the camera.
What are your current bitrate settings? Go to Video- Stream and click on General for compression, Zipstream for the Zipstream setting and bitrate control for the bitrate setting.
You can increase the bitrate by decreasing the compression (default is 30). Just keep in mind, if you use variable bitrate and turn off compression, be prepared for bitrate over 50Mb/s during the day. If you decide to disable compression, I would recommend switching to average bitrate and setting a target bitrate and a max bitrate.
Unfortunately for both you and I we're using this camera for a purpose it was not designed to do. Since the camera is mostly zoomed in, the aperture is pretty small (F=4.0 as opposed to F=1.7 zoomed out) which means we need more light to run it in color at night. The Dahua Color 4K-T has an aperture of F1.0 for reference.
I have a lot less light than you do and I'm able to get a better color image of a moving person at night than you. I think you can definitely improve the image quality but I personally don't think this is the right camera for your intended purpose. This camera is really designed for an overview of a large well lit area.
Also, what is the distance from where the camera is mounted to the sidewalk where the people were walking in the video?
I'm going to attempt to fine tune mine to run in color at night instead of IR. If I can find settings that I like, I'll post them for you to try.