T1i Noise Reduction...why won't it turn off fully?

Thanks for the link, I am aware of most of this. The problem really is not with DPP. The problem is with ACR applying noise reduction that cannot be stopped (it has nothing to do with the noise reduction sliders...those are at 0, but the image still looks like the noise reduced version in DPP).

Anyway, I think it's funny that I've never noticed this before, nor has anyone else seemed to have been very upset by this issue. Images coming off of the T1i with no NR looks great, have lots and lots of detail to work with. Images opened in ACR look muted, and lines in detail look soft. Sure this doesn't really matter when you zoom back out, but sometimes you need to go all the way down to 100 percent crop, and if it means having a little bit of grain to persevere detail, then that's the way it should be. Ok, I'm ranting...thanks for the help. I shall struggle on.

d verret said:

It's fun that everyone keeps mentioning that DPP will apply 2 NR points natively...I've had a different thing happen. On 100 iso images it applies 1 to both NR sliders. At 800 it goes up to 4. At 12800 it goes all the way up to 7/13 respectively.

And this is not because of high iso NR option, that is off...I tried all this with that feature on and the sliders come out even higher natively.

Anyway, I really don't think that there is a real solution. I cannot make ACR quit doing it's thing, so I just have to find a work around...probably just stop using ACR and only using photoshop for JPEGs and the occasional HDR shot.

Thanks!

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Well for me, once I found out what was going on I switch to DPP for the straight processing with any late post from 16bit TIFF in PS.

yah that's a better idea...damn I forget about tiff sometimes. thanks

d verret said:

WilbaW said:

d verret said:

I understand there is no NR on raw, but there is something in the raw packet telling DPP to apply a certain amount (Not just 2, because depending on the iso it has more....100 iso yeilds 1 on both sliders, 800 is at 4, HI iso goes all the way up to 7 and 13 respectively). So DPP is applying NR depending on whatever these numbers are coming into the program as from the raw packet. Similarly ACR seems to be reading this, because the level of noise reduction mirrors that of DPP.

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When you say "the level of noise reduction [in ACR] mirrors that of DPP", do you mean that the luminance and color sliders on the "detail" tab are in different positions for different files?

I my experience, they are always set to whatever the default is, independent of ISO.

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Naw this is some sort of NR that ACR is doing independent of the sliders (because when I open up a raw image through ACR the slider is always set to 0...but their is clearly some sort of NR that's been applied already).

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How is that NR apparent? How does it "mirror" what happens in DPP?

I probably need some 100% crops to see what you're talking about.

you know it's not as much as I thought. anything from 100-800 iso the amounts of noise reduction (in DPP as "camera settings" for NR, and ACR just opened normally), the two looks the same at 100 percent crop, the same grain. But beyond that I can tell that ACR isn't applying as much NR as DPP. But again, I'm resolved, there's nothing I can do to control ACR's use of NR, so I'm not worried about it anymore, each tool will have it's place.

d verret said:

yah that's a better idea...damn I forget about tiff sometimes. thanks

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Just let DPP send the converted file directly to PS (it is in the "Tools" menu).

Yes, the file will be sent as TIFF via a buffer on the hard drive, but to you that should not really matter... it just opens in PS as 16bit per colour channel image, for you to post process.

Do set the colour space the same in DPP and PS, otherwise the colours between DPP and PS will vary.