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Dahua Ultra Starlight Varifocal Bullet (IPC-HFW8232E-Z)

NoloC

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nayr said:
The P-Iris the Camera's Software has control over, an Auto-Iris.. the Iris operates independently on its own and the camera cant control its aperture directly.

The camera knows what the image is looking like and if something is washed out, or under exposed it can adjust accordingly, with auto-iris the aperture is being adjusted regardless what the image looks like, and regardless if its helping or hurting things.

Heres Axis's marketing on it: http://www.axis.com/files/whitepaper/wp_p-iris_38023_en_1009_hi.pdf
Click to expand...
OK so looks like the P-Iris can dick with the shutter speed and gain to try and leave the aperture in a more desirable range. Quoting from that Axis "white paper":
"Working in conjunction with P-Iris is the use of electronic means—gain (amplification of the signal level) and exposure time—to manage slight changes in lighting conditions and to further optimize an image."

The challenge with any camera system shooting humans is proper exposure for the face. Not sure this P thingy is actually intelligent. Probably just keeps the iris in a range that doesn't compromise the image too much due to the lens limitation at aperture extremes. Interested to see how it works out. I don't see from the description that it is very different from a plain old auto-iris driven by video peaks or averages. Just has limits for the F stops. (Guessing) As you stated the paper was more marketing than science. I guess the proof will be in actual use.

I have a rural situation with almost nothing to reflect the IR so when a face pops in front of the camera, it washes out and can't react fast enough. (Hik 2032)
This may be the solution.

Thanks again!
 
nayr

nayr

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look at the images in post #24, I know in these conditions the Eco can do much better than it did.. However, I moved the FOV of the Eco so both cameras would be as close as posisble.. this pointed it downwards instead of outwards, and with the IR on both cameras it caused a hotspotting effect.. the auto-iris over-corrected and the whole image darkened.

in the same situation the p-iris adapted to it alot better by using shutter and iris together for best photon gathering.. my only option for the Eco is to re-adjust the FOV so the IR is shooting out against the fence and not the yard, this makes the auto-iris is less agressive and the whole scene is much better exposed.

In some situations the difference may be negligible; in others it can be huge.
 
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bp2008

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Nice camera! Have you tried turning off 3D noise reduction (at night) just to see what it looks like without? The eco starlight turret it is a noisy disaster without 3D noise reduction.

Also a bit jealous of the magical SSA feature you were showing off on page 1. It looks like what WDR is supposed to be.
 
nayr

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its also a noisy bastard w/out 3DNR, probably more so than the eco starlight turret..

ran into a slight hickup on the install of this camera.. base is wider than my junction box, live stream might be out a while
 
bp2008

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Hah. The eco starlight was already the noisiest cam I remember ever seeing (with 3D NR off). Funny how that works. Better at low light, but also noisier before processing.
 
NoloC

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nayr said:
look at the images in post #24, I know in these conditions the Eco can do much better than it did.. However, I moved the FOV of the Eco so both cameras would be as close as posisble.. this pointed it downwards instead of outwards, and with the IR on both cameras it caused a hotspotting effect.. the auto-iris over-corrected and the whole image darkened.

in the same situation the p-iris adapted to it alot better by using shutter and iris together for best photon gathering.. my only option for the Eco is to re-adjust the FOV so the IR is shooting out against the fence and not the yard, this makes the auto-iris is less agressive and the whole scene is much better exposed.

In some situations the difference may be negligible; in others it can be huge.
Click to expand...
There is so much magic shit going on in these cameras may be hard to tell. I think looking at the glare on the top of the focus chart seen in the Eco shot, but not in the Ultra shot, there may be a difference in angle contributing to Eco auto-iris response? Also that is static. What happens with a moving subject at say 10fps. In that case you probably want shutter.

Anyway the Ultra looks better!
 
hmjgriffon

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nayr said:
yeah I try to get at least a full day of live stream on youtube so you can go back and look at it durring any time of the day, or find me playing with all the settings and trying various shit out

its in the first post, keep checking the first posts on my reviews.. I update them frequently because the threads grow massive and most dont want to read it all

not much activity in back yard, just dogs shitting and trees swaying.. but when I move it up front there'll be traffic at least

While I am streaming anyone is welcome to request me put the camera at various settings, just open it in youtube and you can chat.
Click to expand...
I saw links to YouTube videos but no YouTube live stream that I could tell.
 
nayr

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was just down fucking w/cabling and noticed that when I plugged in the Bullet it lit-up my switch for GigE speeds; whent and checked its webUI and sure enough.. this camera negotiated a GigE link.. must have a pretty damn good SoC on it if it comes with that.

First GigE camera Ive ever ran across.. not that it needs it, but niiice.

I'm seeing about 5.5W idle on my bench, so the heater and IR are off.. about 13.5W with IR on full blast.. should note this comes with both near and far IR and both are independently controlled.

So about ~8W of IR power, compared to the ~2.5W of the Eco.. so just a lil over 3x more IR.
 
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tangent

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Gigabit is actually in the spec sheet. Interestingly the number of simulcast/multicast connections in the specs remains the same at 10/20
 
nayr

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yeah im betting GigE is just part of the Arm chipset they used.. that means it probably has internal bus speeds that exceed 100Mbit and is quite a bit faster than the Eco's internally.

mebe I can get firmware from andy and modify it w/my own telnetd.. not keen on bricking this fine thing though.

Installing this today turned out to be a bitch, im glad I abandoned the 4MP bullet and didnt route wires because imna have to come up w/something clever here.
 
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Kawboy12R

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Some dude in dreads and a white bandana just checked your door handle on the live feed. Better call the cops... :)
 
nayr

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yeah that was w/SSA on, I ripped it right off my NVR like that.. its unmolested.

auto exposure, smartIR, nothing other than SSA really tweaked at this point
 
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