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XZ-1 noise reduction - is it really that bad?

Started Jun 16, 2011 | Discussions
fcz Forum Member • Posts: 63
XZ-1 noise reduction - is it really that bad?

i am planning to buy a new camera soon, and XZ-1 is my biggest favourite. however, i am really troubled by these stories about very aggresive noise reduction. i've found this sample somewhere on the internet and it looks really disturbing.

i would like to hear opinions of XZ-1 users. is it really that bad?

ijustloveshooting
ijustloveshooting Veteran Member • Posts: 3,003
Re: XZ-1 noise reduction - is it really that bad?

thanks to it's extremely bright lens, i used iso100 at %99 of my shots. so it's not a problem....

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SayJaiBow Contributing Member • Posts: 750
Re: XZ-1 noise reduction - is it really that bad?

did you look at the iso? That was taken at iso 1000. Now if you got one of the new sony cams that would be how an iso 200 pic would look like...lol

Sho-Bud
Sho-Bud Contributing Member • Posts: 712
Re: XZ-1 noise reduction - is it really that bad?

You can allways shoot RAW, no NR is applied to the RAW images.
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Mark9473 Veteran Member • Posts: 6,420
Re: XZ-1 noise reduction - is it really that bad?

I have to say honestly that my SZ-10 at ISO 1600 looks better than that - more noisy, but more natural and detailed.

Of course the whole thing about the XZ-1 is that in principle when my SZ-10 needs ISO 1600 the XZ-1 happily takes the shot at ISO 600 or so.
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ChristianHass Veteran Member • Posts: 3,270
Re: XZ-1 noise reduction - is it really that bad?

Sho-Bud wrote:

You can allways shoot RAW, no NR is applied to the RAW images.

Just keep in mind that you need additional software for this. The Olympus Viewer 2 software will apply NR automatically, you can turn it off slightly with the Noise Filter setting, but it's still quite heavy handed.

The cheapest way seems to be Photoshop Elements 9, but then you lose the option of applying the Art Filters and the colors won't be "Olympus" anymore.

I compared the two by downloading the ACR converted files from the XZ-1 review and converted the ORF files in Olympus Viewer 2 with the Noise Filter set to OFF.

I think the NR is clearly visible even at ISO100, at least in a direct comparison, but from ISO200 and beyond I think it would be visible without having to compare.

I don't think ISO100 looks bad though, but it would have been nice if Olympus had given us a choice in the matter.

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Michael_13 Regular Member • Posts: 365
Only if you want it this bad.

This shot was forced to be bad. ISO100 would have been enough.

Using ISO1000 in such a bright surrounding is simply unnecessary. Keep ISO below 250 and you're fine.

Ciao,
Michael

Crazy_M New Member • Posts: 12
Re: XZ-1 noise reduction - is it really that bad? - NO!

I think you'll find that image was taken with one of the high speed drive modes, 7fps or so. It usually ratchets the iso to 1000.

They are not worth using because they pump the iso up even in bright sunlight and then the images taken get extreme noise reduction done to them. The NR is never as bad as your example in the regular Continuous drive mode.

I have a hunch the XZ-1 does this because the imaging pipeline cannot handle the data speed of highly detailed shots at 7fps, so it discards most of the detail in the interest of speed

snake_b Veteran Member • Posts: 4,680
Re: XZ-1 noise reduction - is it really that bad? - NO!

I've found NR too aggressive at all stages during my search. Also, look at a recent thread I posted in with "low light" in the title. The picture was shot at reasonably low ISO, with severe noise, banding, and detail loss (like faces weren't even visible).

Found the link: http://forums.dpreview.com/forums/readflat.asp?forum=1008&message=38593325

cxsparc
cxsparc Veteran Member • Posts: 3,838
Re: XZ-1 noise reduction - is it really that bad? - NO!

@Snake: Repeating your complaints does not make them more understandable.

You have complained about the faces not being distinguishable, but the only picture with faces in it is the "bar" picture. And that has been taken at such a long exposre that it is immediately obvious that there is motion blur to every person.

The pictures in the thread you have mentioned are actually rather well done for both a compact camera and without the use of a tripod.

Noise reduction in the Xz1 can be excessive, but in good lighting I have noticed that the amount applied is so low that I could not improve the pictures using Adobe Camera Raw.

In other cases, ACR helps to correct almost anything.

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Crazy_M New Member • Posts: 12
Re: XZ-1 noise reduction - is it really that bad? - NO!

I've found NR too aggressive at all stages during my search. Also, look at a recent thread I posted in with "low light" in the title. The picture was shot at reasonably low ISO, with severe noise, banding, and detail loss (like faces weren't even visible).

Found the link: http://forums.dpreview.com/...ms/readflat.asp?forum=1008&message=38593325

I would have said the faces arent visible because they are sihouetted in an underexposed shot. Almost completely black. And looking at a photo of a painting in a dark room at F1.8 looking for detail? Seriously??

The XZ-1 is a great camera, but its no miracle worker. Sensorwise its still in the same ballpark as other advanced point and shoots. But if you shoot raw and process iteffectively it has more detail than its peers, as many reviews show.

cxsparc
cxsparc Veteran Member • Posts: 3,838
Re: XZ-1 noise reduction - is it really that bad? - NO!

Here now some real-life examples to show the extremes.

Examples one are one OOC shot and the same with PP with ACR. A teleshot with the lens wide open. Notice that the OOC shot is already excellent in the rendition of the hair (go 100%), although ACR improves it slightly.

Example 2 is an accidentally overexposed shot (my mistake). The sheep look like swine in the 100% crop and the bushes are awful (but again, in 100% size!).

The raw file allows to correct most and now ACR shines both in avoiding unnecessary NR and recovering an immense amount of detail. The faces of the people have excellent detail even at 100% magnification. See the first picture to get a feeling how large the magnification is.

My personal summary: The xz1 has its drawbacks, but it sometimes gives me outstanding pictures without having to post-process. And if I do PP, I can be sure that there is further potential.

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Homl Senior Member • Posts: 1,514
Re: XZ-1 noise reduction - is it really that bad?

I don't know what all the noise is about. Pun intended.

My old Fuji F30 is still one of the better low noise performing P&S. If you pixel peep, the noise reduction is water color like. But if look at the image as a whole, it is very decent. Same as the XZ-1. Look at the image as a whole. Don't expect DSLR noise performance at the pixel level, it is not going to happen. Want to control you own noise reduction, you can always shoot RAW files.

I am happy with the noise performance XZ-1; plus it can shoot at lower ISO than most, if not all P&S, due to its awesome fast and sharp lens. Use it wide open all day long.

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davidaj2003 Regular Member • Posts: 210
Re: XZ-1 noise reduction - is it really that bad?

Homl wrote:

I don't know what all the noise is about. Pun intended.

My old Fuji F30 is still one of the better low noise performing P&S. If you pixel peep, the noise reduction is water color like. But if look at the image as a whole, it is very decent. Same as the XZ-1. Look at the image as a whole. Don't expect DSLR noise performance at the pixel level, it is not going to happen. Want to control you own noise reduction, you can always shoot RAW files.

I am happy with the noise performance XZ-1; plus it can shoot at lower ISO than most, if not all P&S, due to its awesome fast and sharp lens. Use it wide open all day long.

All people want is an ability to control the NR level within the camera, to save on any requirement to process RAW at all (especially with being forced to use the very slow OV2 if you want to retain colours/art filters). I think people expect the performance to be less than large sensor cams, but as cxsparc has nicely demonstrated here, the OOC JPEG could be better.

One other point - shooting wide open to reduce the need to increase ISO leads to shallower depth of field and less sharpness - if I want to shoot at f4 or more to improve sharpness or increase DOF, then you do sometimes need higher ISO, so poor noise performance at high ISO is no excuse. There are consequences to large apertures, in addition to the benefits of letting in more light.

OP fcz Forum Member • Posts: 63
Re: XZ-1 noise reduction - is it really that bad?

maybe this is a dumb question, but agressive NR could be solved with some firmware update, right?

davidaj2003 Regular Member • Posts: 210
Re: XZ-1 noise reduction - is it really that bad?

fcz wrote:

maybe this is a dumb question, but agressive NR could be solved with some firmware update, right?

Yes, either a better NR algorithm (less likely), or just a menu item to switch it on/off/hi/low etc (more likely), or both.

LTZ470
LTZ470 Forum Pro • Posts: 11,926
Re: XZ-1 noise reduction - is it really that bad?

The E-PL2 automatically turns off NR in Burst Mode...I am going to test the XZ-1 to see if it does the same...I couldn't find anything in the manual or wsebsite...
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Marla
Marla Veteran Member • Posts: 8,994
Re: XZ-1 noise reduction - is it really that bad?

davidaj2003 wrote:

fcz wrote:

maybe this is a dumb question, but agressive NR could be solved with some firmware update, right?

Yes, either a better NR algorithm (less likely), or just a menu item to switch it on/off/hi/low etc (more likely), or both.

That would be great - the option to turn it off. Do you think Oly will ever hear us - and act?

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OP fcz Forum Member • Posts: 63
Re: XZ-1 noise reduction - is it really that bad?

then let's bomb olympus with mails requesting an option to turn off or reduce NR.
maybe, if we're boring enough, they'll do something.

davidaj2003 Regular Member • Posts: 210
Re: XZ-1 noise reduction - is it really that bad?

Marla wrote:

davidaj2003 wrote:

fcz wrote:

maybe this is a dumb question, but agressive NR could be solved with some firmware update, right?

Yes, either a better NR algorithm (less likely), or just a menu item to switch it on/off/hi/low etc (more likely), or both.

That would be great - the option to turn it off. Do you think Oly will ever hear us - and act?

They claim to monitor popular forums for feedback, so I'm sure they hear us - acting on it is another matter. We can only try. Many people have contacted Olympus directly (email/call to their tech support you can find on their website).

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