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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
If those numbers are correct then I am back to square one. It means that the 8MP cam has a pixel size that is half of a 4MP cam (I suspected it might be much less than 50% because of the readout lines, i.e. ignore all the grid lines). Hence, if you downsample an 8MP cam to 4MP you should get... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
I really need to find some specs for those sensors, i.e. I want to know what the fill factor is for a 2MP camera vs a 4MP camera vs an 8MP camera on the same sensor size. Not that it matters for the camera I bought (maybe it was a mistake) but I just try to understand where this issue is coming... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
I don't care too much about color but if you look at the grass the 2MP does a LOT better. It's not even that there is much noise (there is some) but it's just plain fuzzy. Downsampling it reduces a bit of noise but it makes the image even fuzzier. That's kind of a surprising result. It's almost... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
I think my error is in assuming a completely wrong fill rate. I was thinking of something like 95% or more (95% of the area is used to gather light and 5% is for reading the pixels). Google didn't tell me much but it seems for those tiny 1/1.8" sensors the fill rate might be more in the 1/3 (35%... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
Well, I bought the IPC-T5842T-ZE from Andy... It's a refurbished cam so probably someone returned it for a 4MP cam... I didn't even know Andy accepts returns. I should read his return policies (not that I am going to return it). I read through the threads but I still don't quite understand why... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
I am not sure but I think I understand your "screen" point. But isn't the fill factor of those pixels in the range of >=95% (a bit more for 2MP cams vs 8MP cams because there are twice as many lines in each direction). So having a few more "screen lines" doesn't matter that much, I would think... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
That is the part I don't really understand. For simplicity, lets assume we have a 8MP camera and a 2MP camera each with the same sensor size. So the 8MP camera gets 1/4 of the light per pixel compared to the 2MP camera. That results in much more noise in the 8MP camera compared to the 2MP... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
@wittaj that is quite interesting that downsizing from 8MP to 2MP created soft images (besides the fact that it's now a 2MP image). If this downscaling happens on(!) the camera then there shouldn't be much blurring and the noise should be reduced. That makes me wonder what the (Dahua) cameras... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
Well, that is kind of my point. Both the 8MP and the 4MP have the same sensor size so both get the same amount of light. If you scale down the 8MP to 4MP then the only difference is that with the 4MP the light is converted to 4MP before the AD conversion and with the 8MP it is done after the AD... -
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4MP vs 8MP (IPC-T5442T-ZE vs IPC-T5842T-ZE)
I am deciding on a new turret cam. I read the threads about the two cameras. They both have the same sensor size but one is 4MP and the other one is 8MP. I understand that in most cases you want to go with the lower MP to have less noise (unless you have a really well lit area where the 8MP cam... -
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IPC-B5442E-Z4E Still The Best?
Thanks for the quick reply. I will go for another 5542-Z4E. -
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IPC-B5442E-Z4E Still The Best?
I need another varifocal camera for one side of our home. I have a IPC-B5442E-Z4E on the other side and it works reasonably well. For that camera I have Day & Night on Auto for both Day and Night and it never goes into B&W. The other side (the one I need a camera for) has less light so I suspect... -
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Filtering/Searching Dahua Cams
I am looking for an additional Dahua camera but Dahua's website is terrible to quickly sort through all the offerings. https://www.dahuasecurity.com/Products/All-Products/Network-Cameras I would like to be able to filter on things like sensor size, mega pixels, vari-focal, etc. Am I missing... -
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Get Light Level from Camera
I am doing home automation (using HomeSeer) and for many actions depend on the light level. For indoor I have plugin light sensors but outside I would have to use wireless sensors. Hence, I was wondering if the cameras could be used as light sensors? I don't think cameras provide any LUX... -
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Indoor Camera With BI and App Access
@looney2ns I just purchased tasker. Are you using it yourself? If so, would you mind sharing a screenshot how you have this set up, i.e. start VPN when the BlueIris app is being started.- rfj
- Post #3
- Forum: IP Cameras
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Android App or UI3
I purchased the app and tried it out. Except for the fact that the final setup requires VPN (will try out tasker to automate it), this is exactly what I needed for my wife. I created an "indoor" group for all the indoor cams. Then you can click on a cam to see just that camera. PTZ works as... -
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Android App or UI3
Ok, I will have to buy the app then. I assume the app from BI is the best rather than some 3rd party app. -
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Android App or UI3
@wittaj are you saying that two way communication doesn't work with ui3? That is actually my experience, i.e. I can hear sound recorded by the camera. However, when I talk into the mobile device nothing can be heard on the camera. Is it expected that this doesn't work or do I have an issue with... -
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Access Point for Wireless Cameras
Thank you. I gave an older wireless router away about a year ago... It looks like there aren't too many requirements. Based on this, I just bought a used TP-Link EAP225 for $35 incl. shipping. It seems to more than meet requirements and it also supports 802.3af/at PoE so I can avoid another cable.- rfj
- Post #4
- Forum: Networking
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Access Point for Wireless Cameras
I am putting all my cameras in a separate VLAN. I have a few wireless cameras that are on my "main network"/LAN (with internet access). I want to connect a separate AP to the camera VLAN and then have the wireless cameras connect to that AP. Are there any particular things to look for when...- rfj
- Thread
- access point amcrest vlan
- Replies: 5
- Forum: Networking
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LPR: Blurry Images During Day Time
Good point. I actually don't think fps has anything to do with exposure, etc. I just mentioned it because @IReallyLikePizza2 said he is running at 25fps so I wanted to make everything the same. It's my understanding exposure, etc is all controlled by the shutter speed. So let's say I run at... -
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LPR: Blurry Images During Day Time
I played with the focus manually and now I am getting a lot better images. When I did auto focus it set the focus to 1081. I adjusted it manually down to 1065. Note that this is still with 25fps and 16,000bps. What puzzles me #1 is the fact that the asphalt is still pretty sharp but so are the... -
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LPR: Blurry Images During Day Time
I temporarily switched over to color as most people record in color during daytime. I also set sharpness to 50 and for daytime gain is 0-40. This is the non-moving car I used to autofocus (zoom 1020, focus 1081). 15fps, 8192bps. This is a moving car after autofocus with fps increased to 25... -
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Android App or UI3
We have some indoor cameras (VansView) and I am going to add some Amcrest cams. All of them will (not yet) be on a separate VLAN. Hence, to access them I have to use BI. There is the BI Android App but the reviews are pretty bad. So I am wondering if I should just use UI3. The main problem I... -
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LPR: Blurry Images During Day Time
Yeah, I was going to just leave it but then as @IReallyLikePizza2 says, his pictures are a lot better even when you look at my picture (post #29) that was taken under more ideal conditions. Anyways, I can read the plates so I get what I need. -
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LPR: Blurry Images During Day Time
This picture is after autofocusing. The car was not moving. This is a car just a few minutes after I did the autofocus. -
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LPR: Blurry Images During Day Time
How would I manually adjust the focus? Does it involve opening the housing of this bullet camera? This camera is kind of hard to remove because it's located close to the street and close to the ground so I mounted it that you can't just walk up and rip it out... -
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LPR: Blurry Images During Day Time
I did zoom in some more and put the Day profile to B/W so there is no focus difference between Day and Night (B/W vs color). However, while the plates are readable I am still getting pretty blurry images. I did go into the settings and with zoom at 1100 focus was at 1200. If I adjust it 20 up or... -
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Surveillance VLAN: Dahua, HikVision, etc Have Many OUIs
I have a new switch that has a "Surveillance VLAN". It is based on OUIs (Organizationally Unique Identifier), i.e. the first three bytes of the MAC. When I looked at the MACs of all my cams it appeared all of them have different OUIs and I only have two brands plus one Amcrest. So I used the...- rfj
- Thread
- mac address vlan
- Replies: 0
- Forum: IP Cameras
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Blue Iris Camera Compatibility.
Interesting. I have to check if my cameras do that (Q-See, WansView and the first Amcrest 841 I received today).- rfj
- Post #10
- Forum: IP Cameras