Blown Out Images

R

rfj

Pulling my weight
Oct 26, 2014
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I replaced a HikVision cam with a 3x more expensive Dahua cam. Even at night the Dahua cam is still showing color images with pretty good detail while the HikVision switched to B/W and is somewhat noisy. Hence, there is definitely an improvement. Having said that, the Dahua cam is completely blowing out/saturating part of the picture (walkway). Granted, the HikVision shows the street really dark while the Dahua shows good details. In any case, are there settings to improve this blown out area? I added two attachments. The B/W image is the HikVision cam and the color one is the Dahua.
 

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Have you attempted to adjust the cam's exposure settings or are you using defaults? Is it important to see the light fixtures? Really what is important is what does the view look like with a person walking along the walkway.

Check out this thread:

Common issues with camera image

Here is a quick guide to what might go wrong with the image of your cctv camera, and how to fix this. MOTION BLUR: This is probably the most common issue, new camera owners run into. Many times on this forum I've seen posts like: "I bought a set of cameras recently. The image looks great on...
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As above, play with the exposure. Possibly brightness as well. There may also be an HLC compensation that you can use for that area.
 
I played with the brightness but the only thing it did is making the good exposed area dark while the blown out are stayed blown out. I googled HLC and it seems that stands for high light compensation. I did go through the camera settings but didn't find HLC or high light compensation. Where can I get to this setting?
 
There are many Dahua IPC models just like there are many different Samsung phones.
what is the model?
you should check at camera>conditions>backlight try all modes
but not all Dahua models support it.
 
rfj said:
I played with the brightness but the only thing it did is making the good exposed area dark while the blown out are stayed blown out. I googled HLC and it seems that stands for high light compensation. I did go through the camera settings but didn't find HLC or high light compensation. Where can I get to this setting?
Click to expand...

See if it is under conditions-backlight-mode
 
Last edited:
Yeah HLC should help and a 1/60 - 1/120 shutter.

One problem folks forget when trying to run color at night, if the ambient light source is in front of the camera, you're going to get a backlight condition, like youre seeing, where the foreground is dark. if it were me, I'd swap those two cameras. Run the HiK in B&W/IR
 
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