Blurred Moving Images When Stopping Frames At Night Time

[newsystem 0]

Hello group

 

I am new to this group and please forgive me for being a complete amateur at video surveillance. The reason that I'm coming here is because the company I purchased the unit from does not have knowledgeable technical support to resolve my issue.

 

I have a Lorex DV-7041 analog DVR and the two cameras I want to talk about and are an LEV2724B and LEV2750AB.

 

The problem i'm trying to resolve is. On both of the name cameras above. When I go through recorded events during the night time and view moving objects for instance moving cars or people walking by. When I stop the video clip on a moving car it is just like a blur. The same goes for people walking by. The images are always blurred when I stop the video. But when I do it during the daytime the pictures are always crystal clear and completely without any blur.

 

The cameras are presently set on 1080P but I've tried them on 720P, 960H and anything else I can find and still cannot resolve the issue.

 

If you can help me resolve this issue I would greatly appreciate it.

 

Thank you

[the toss 0]

I wouldn't be buying from them any more - cause this isn't rocket science. What a camera is trying to do is capture an image which is composed of light. Almost any scabby low quality camera will be able to do this with varying degrees of success. The REAL test is at night in low (no) light. Because of the poor sensitivity of the sensors used in cheap cameras there are a number of tricks the manufacturers use to compensate. They can wind the AGC (automatic gain control) up. This amplifies the signal but unfortunately also amplifies the noise which results in a grainy picture. They can increase the aperture and shutter timing which lets more light through to the sensor but this can result in objects moving across the frame while the shutter is open resulting in the blurred image you are getting.

So - short answer is that it is the result of cheap cameras.

[tomcctv 190]

I wouldn't be buying from them any more - cause this isn't rocket science. What a camera is trying to do is capture an image which is composed of light. Almost any scabby low quality camera will be able to do this with varying degrees of success. The REAL test is at night in low (no) light. Because of the poor sensitivity of the sensors used in cheap cameras there are a number of tricks the manufacturers use to compensate. They can wind the AGC (automatic gain control) up. This amplifies the signal but unfortunately also amplifies the noise which results in a grainy picture. They can increase the aperture and shutter timing which lets more light through to the sensor but this can result in objects moving across the frame while the shutter is open resulting in the blurred image you are getting.

So - short answer is that it is the result of cheap cameras.

 

 

I think you are wrong ....... How have you got to his cameras being cheap ?

[tomcctv 190]

Hello group

 

I am new to this group and please forgive me for being a complete amateur at video surveillance. The reason that I'm coming here is because the company I purchased the unit from does not have knowledgeable technical support to resolve my issue.

 

I have a Lorex DV-7041 analog DVR and the two cameras I want to talk about and are an LEV2724B and LEV2750AB.

 

The problem i'm trying to resolve is. On both of the name cameras above. When I go through recorded events during the night time and view moving objects for instance moving cars or people walking by. When I stop the video clip on a moving car it is just like a blur. The same goes for people walking by. The images are always blurred when I stop the video. But when I do it during the daytime the pictures are always crystal clear and completely without any blur.

 

The cameras are presently set on 1080P but I've tried them on 720P, 960H and anything else I can find and still cannot resolve the issue.

 

If you can help me resolve this issue I would greatly appreciate it.

 

Thank you

 

 

Hi. You have the cvi system . Have you set your camera for both day and night with the same setting ?

 

You might be expecting to much from your external dome. But I few things you can try.

 

Go into your camera menu and set night mode to a lower frame rate .... 7 or 10 and also do not use the zoom at night and just rely on your dvr to use the zoom when looking back of footage.

 

It depends on camera distance you are picking the cars up at

[the toss 0]

I wouldn't be buying from them any more - cause this isn't rocket science. What a camera is trying to do is capture an image which is composed of light. Almost any scabby low quality camera will be able to do this with varying degrees of success. The REAL test is at night in low (no) light. Because of the poor sensitivity of the sensors used in cheap cameras there are a number of tricks the manufacturers use to compensate. They can wind the AGC (automatic gain control) up. This amplifies the signal but unfortunately also amplifies the noise which results in a grainy picture. They can increase the aperture and shutter timing which lets more light through to the sensor but this can result in objects moving across the frame while the shutter is open resulting in the blurred image you are getting.

So - short answer is that it is the result of cheap cameras.

 

 

I think you are wrong ....... How have you got to his cameras being cheap ?

 

Maybe you're right Tom & I jumped to an unfounded conclusion. What I "should" have said is that his symptoms are indicative of having a cheap camera

[newsystem 0]

Hey guys thanks for the great response to my post. I just finished setting the cameras for day and night both at level 7. Let's see what happens tonight and I'll get back to you guys tomorrow.

 

Thank you

[newsystem 0]

Still working on the night settings. Haven't had much luck with setting 7. I'll try resetting lower tonight.

 

Do you guys know where I can get a list of the following abbreviations for the two cameras I originally listed. Delay, DP comp, privacy, DNR, AGC, sens up. And what is self adaption?

 

Thank you

[Daryl733 0]

Basically there's not enough lights where your camera is pointing at and the camera is configured to compensate by slowing the shutter speed.

 

Did you manually adjust any settings in the camera configuration ? Try resetting back to factory default.

 

Those 2 Cameras looks like IR Cameras.

By right at night, most IR Camera default setting would means the IR light should kicked in and you'll see the images in black and white. Those that are out of range of the IR light would be too dark to be seen.

 

If you are still seeing in colors, most likely you had manually adjusted the settings of the cameras to force it to still be in color/disabled the IR light, causing shutter speed to be slowed and resultant video would be blurred.

 

It's basically the same as your HP Camera. Insufficient lighting results in blur images.

[newsystem 0]

Basically there's not enough lights where your camera is pointing at and the camera is configured to compensate by slowing the shutter speed.

 

Did you manually adjust any settings in the camera configuration ? Try resetting back to factory default.

 

Those 2 Cameras looks like IR Cameras.

By right at night, most IR Camera default setting would means the IR light should kicked in and you'll see the images in black and white. Those that are out of range of the IR light would be too dark to be seen.

 

If you are still seeing in colors, most likely you had manually adjusted the settings of the cameras to force it to still be in color/disabled the IR light, causing shutter speed to be slowed and resultant video would be blurred.

 

It's basically the same as your HP Camera. Insufficient lighting results in blur images.

 

Great response and makes a lot of sense. I have the camera pointed across the street in my driveway which is probably 60 feet away. There are some streetlights and a driveway light but it may not be bright enough. This would explain the slowing shutter as you said.

 

They are IR cameras and I have them placed behind glass. Because of the reflection in the glass I had to cut the appropriate IR wire which eliminated the IR light and stop the reflection in the glass.

 

You read my mind when you said reset to factory settings. After last night's testing which went wrong I decided this morning to set to factory settings. I will leave it at factory settings overnight and see what happens. If I find that the shutter is still slow I will attempt to make adjustments. If so I would only make adjustments to the shutter and nothing else. That may have been some of my problems, playing with too many controls.

 

Thanks for being there!!

[Daryl733 0]

They are IR cameras and I have them placed behind glass. Because of the reflection in the glass I had to cut the appropriate IR wire which eliminated the IR light and stop the reflection in the glass.

 

Never put IR cameras behind additional glasses. If you look in the camera, you'll find rubber separating the IR light and the lense. This prevent the IR light from reflecting off the glass back to the lens.

 

If you put it behind additional glass, it'll be like standing behind a glass window and shining a torchlight in your lawn at night and expecting to see clearly. All you'll see is the torchlight reflecting off your glass and not being able to see the lawn outside.

 

Turn off the IR light ? Basically you are eliminating the night vision feature of the camera.

Without sufficient lighting, you'll either get dark images or blur images.

 

You want better image quality, install the camera outside.

No professional will recommend an installation of IR camera this way.

 

Alternatively if you are afraid of stolen/vandalised camera, install a IR illuminator outside and switch off the IR function of your camera.

It'll do the same thing.

Other than that, you can also install a motion triggered floodlight. Personally, I find them very effective as a deterrence against potential intruders.

[newsystem 0]

I still get blurry images at night no matter what settings i use. I'm not sure if I'm really happy with this system. Do you guys think or know if a digital system will give clearer more recognizable images for night and day use?

[the toss 0]

I still get blurry images at night no matter what settings i use. I'm not sure if I'm really happy with this system. Do you guys think or know if a digital system will give clearer more recognizable images for night and day use?

 

A good system will give clearer more recognizable images for day and night use

[newsystem 0]

I still get blurry images at night no matter what settings i use. I'm not sure if I'm really happy with this system. Do you guys think or know if a digital system will give clearer more recognizable images for night and day use?

 

A good system will give clearer more recognizable images for day and night use

 

I see that you're a licensed installer and trainer. In your professional opinion, do you think I am better off with the digital system or an analog?

 

I presently have an analog system and I still have another five weeks to take advantage of my return policy back to Lorex. What you think I should do?

[Daryl733 0]

Did you try installing the cameras outside and not behind the windows and get the same results ?

 

Otherwise, it got nothing to do with digital or analog system.

Basically there's insufficient lighting the way you installed.

Within the price range of the equipment you are looking at, it'll be difficult to get one that can get clear picture at low/no lighting without additional illumination.

[tomcctv 190]

I still get blurry images at night no matter what settings i use. I'm not sure if I'm really happy with this system. Do you guys think or know if a digital system will give clearer more recognizable images for night and day use?

 

A good system will give clearer more recognizable images for day and night use

 

I see that you're a licensed installer and trainer. In your professional opinion, do you think I am better off with the digital system or an analog?

 

I presently have an analog system and I still have another five weeks to take advantage of my return policy back to Lorex. What you think I should do?

 

Hi. Are you making the changes on the recorder or the camera end ?

[newsystem 0]

Thanks for letting me know that my analog system is okay. I really don't want to return it if I don't have to.

 

Today I'm in the market for an IR illuminator. I'm going to leave my camera behind glass with the IR off. I will be purchasing an IR illuminator that will be placed outside.

 

Thanks guys for all your help and if I should think of anything I'll let you know. Of course I'll let you know my progress with the IR illuminator.

[msecure 0]

Even 2Mp TVI recorded at 25/30fps also cannot capture moving vehicle licence plate at night. You will need 50/60fps but am not aware of any HD Analog camera/DVR combination having this feature for 1080p. You can see the difference in my youtube upload below.

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