Please help me improve my image quality... DS7208-HUHI

R

richardc1983

n3wb
Mar 9, 2019
16
1
Leeds
Hey everyone,

Please could you assist in me getting the best image quality. I have 7 x 5MP Colorvu cameras. I find that image is quality is poor. I have tried all sorts of settings but find that images are blurry. I live on a street with cars coming up and down as well as people passing by.

Here are my settings, I am really close to changing manufacturers as I just cannot seem to get it right, I have spent a lot of time researching, I have had the bit rate higher, lower, I have had the video quality at medium and also bitrate type set to constant as well as H264 & H265 and also with the + set on both.

It seems the theme is a constant bitrate but what should the bit rate be? HIK vision said it should be really low, much lower than their calculator told me and much lower than what it reccomendes as a bitrate range on the front end.

I have WDR set on the cameras themselves as this seems to be the best I can get it, my settings are below.

Any help gratefully received.

Main Stream Normal:
1644698634454.png

Main Stream Event:
1644698654908.png

Sub-stream:
1644698671970.png

Image settings:
1644698609719.png
 
Many here run Constant instead of Variable.

Many have found 4MP needs a min of 8192 bitrate, so you may need higher.

Most find H264 with smart codec (+) off provides the best performance.

You need to adjust exposure, brightness, contrast, etc. to improve the image. WDR especially at night will cause blur and ghosting if too high.

As always, YMMV.
 
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Thanks for the quick reply, do you know any posts I could look at? The bit rate thing is frustrating. What is better if I don't use WDR?
 
You have to get off of auto/default settings and dial it in to your field of view. That means adjusting exposure (1/60 min to avoid blur), contrast, brightness, gain, etc. to get a good image. Only then do you try WDR if needed and as small as possible.
 
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@richardc1983, have you searched the HikVision subforum here? Also, this is the hardware forum, maybe the admin (fenderman) can move your thread to the HikVision forum where you may get better visibility from Hik users. Also post the model number(s) of the cameras you're discussing, this could help people sort out the problems.
This pic ^^^ above, is this one that you would call blurry? It could just be semantics, but I would call that "grainy" or "noisy," but not necessarily blurry. I'm just throwing out some ideas to keep the ball rolling.
 
Steve.L said:
@richardc1983, have you searched the HikVision subforum here? Also, this is the hardware forum, maybe the admin (fenderman) can move your thread to the HikVision forum where you may get better visibility from Hik users. Also post the model number(s) of the cameras you're discussing, this could help people sort out the problems.
This pic ^^^ above, is this one that you would call blurry? It could just be semantics, but I would call that "grainy" or "noisy," but not necessarily blurry. I'm just throwing out some ideas to keep the ball rolling.
Click to expand...

Hey Steve,

Yes that's a sample image, they look noisy/grainy/blurry even though I have turned the sharpness to minimum and 3DNR to the minimum (which has improved slightly) I just cannot make out faces at night. There is plenty of streetlight so the LED's never had to come on.

@fenderman is it possible to move my post as per Steve's advice if you think it appropriate, sorry for posting in the wrong place, it's because I change all the settings on the front end. I have a mix of analogue and IP cameras but all are the same. If I up the bit rate, the pre and post record doesn't work and sometimes it nearly misses the action. HIK vision say that it's because the bit rate is too high.
 
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Of course you cannot make out faces.

The camera is too high.

To identify someone with the wide-angle 2.8mm lens, someone would have to be within 13 feet of the camera, but realistically within 10 feet after you dial it in to your settings.


1642128622427.png


You have lost all of that in the vertical distance alone.

You need to either move the camera down to be 6 feet off the ground or get a varifocal and aim it down the street to "flatten" the angle".
 
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Oh I didn't know this, the cameras are about 8ft up due to where they are, any lower and people would interfere with them. People do come within close distance of them though (less than 13ft) and it doesn't improve image.

I am also trying to update the firmware of the analogue cameras but having no look finding it. There is an option to update camera firmware on the box itself but I need the firmware. Can't even find model number as there is no sticker on them, They are colourvu about 1 year old.
 
The DORI for your particular camera could be even less.

But as someone said, the image looks more grainy or noisy, which happens when their isn't enough light.

Certainly it looks like you have enough light there, but these sensors are so small that they need a lot of light.

Do you have a gain setting? It looks like the camera has cranked that up to 100. I know some HIK cameras you need to switch to manual day and night and not auto to get to gain.

Most people wouldn't mess with it lower. And if they did, then you get a good shot of them.

As it stands now, you could only tell the police what time something happened cause you cannot ID them.
 
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I don't have any gain settings at all. It's literally what I have, I have turned down 3DNR and sharpness to minimum as these made it worse. I don't even have options for day or night day settings are same as night.
 
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