help with noise, please - DPChallenge Forums

Canon EF 70-300mm f/4.5-5.6 DO IS USM

08/08/2008 02:27:52 PM · #1

ok, I've had several comments on the noise in my pics. Can some one show me how to fix this problem?

cpanaioti

Canon EOS-40D

08/08/2008 02:29:38 PM · #2

I don't see a problem with the noise level in the image.

Beautiful.

skylercall

Canon EOS-7D

Canon EF 70-200mm f/2.8L IS USM

08/08/2008 02:31:17 PM · #3

Personally, I love Noise Ninja.

jhomrighaus

Nikon D5300

Sigma 18-300mm f3.5-6.3 DC Macro OS HSM

08/08/2008 02:35:05 PM · #4

I think maybe they are referring to some of the artifacts in the background which i think are due to the size reduction and Jpg conversion.

Nikon AF-S DX Zoom-Nikkor 18-70mm f/3.5-4.5G IF-ED

08/08/2008 02:45:01 PM · #5

Originally posted by jhomrighaus:

I think maybe they are referring to some of the artifacts in the background which i think are due to the size reduction and Jpg conversion.

At 153k file size, I don't think it is JPEG artifacts, though there could be some posterization from resizing and color depth reductions. I do think it is noise or similar artifacts, though. I can clearly see it in a few places, most noticeably the lower right.

What software are you using? I'm not the expert, but this is what I do. Select the background first, as you don't want the noise reduction to kill the detail in the main subject. Since the background is a fairly solid blend of one tone, you should be able to apply fairly heavy noise reduction and get a smooth look. If that does not get it smooth enough, a Gaussian blur can help. You just need to be careful to keep the selected blur area away from the subject by a few pixels or it can create other artifacts. I used a combination of Noise reduction and blur on the similar background in this one:

Message edited by author 2008-08-08 14:48:09.

DarkRider

Nikon D300

08/08/2008 02:50:30 PM · #6

Originally posted by jhomrighaus:

I think maybe they are referring to some of the artifacts in the background which i think are due to the size reduction and Jpg conversion.

and a little pixilation in the yellow reflection of the leaf due to resize. With advanced editing you could use a very light blur tool to smooth it out some after resize. But I don't see any noise!?!

08/08/2008 02:54:49 PM · #7

Originally posted by yospiff:

Originally posted by jhomrighaus:
I think maybe they are referring to some of the artifacts in the background which i think are due to the size reduction and Jpg conversion.

At 153k file size, I don't think it is JPEG artifacts, though there could be some posterization from resizing and color depth reductions. I do think it is noise or similar artifacts, though. I can clearly see it in a few places, most noticeably the lower right.

What software are you using? I'm not the expert, but this is what I do. Select the background first, as you don't want the noise reduction to kill the detail in the main subject. Since the background is a fairly solid blend of one tone, you should be able to apply fairly heavy noise reduction and get a smooth look. If that does not get it smooth enough, a Gaussian blur can help. You just need to be careful to keep the selected blur area away from the subject by a few pixels or it can create other artifacts. I used a combination of Noise reduction and blur on the similar background in this one:

Thanks......I'll try this when I get home from work. I use PS CS2.

Nikon AF-S DX Zoom-Nikkor 18-70mm f/3.5-4.5G IF-ED

08/08/2008 03:28:28 PM · #8

Originally posted by DarkRider:

But I don't see any noise!?!

I'm going to have another look on my home system this evening. I think it is showing up on some monitors but not others, but it is clearly visible to me on the one I am using right now.

I've had some of my own like that. This one has a nice smooth sky on my monitor at home, but at work it shows noisy artifacts in the sky.

Message edited by author 2008-08-08 15:30:46.

DarkRider

Nikon D300

08/08/2008 05:08:41 PM · #9

Originally posted by yospiff:

Originally posted by DarkRider:
But I don't see any noise!?!

I'm going to have another look on my home system this evening. I think it is showing up on some monitors but not others, but it is clearly visible to me on the one I am using right now.

I've had some of my own like that. This one has a nice smooth sky on my monitor at home, but at work it shows noisy artifacts in the sky.

Now this pic I can see LOTs of noise...esp in the lower hazy sky some in the blue

08/08/2008 08:53:46 PM · #10

just a fast edit.....I think it help alot.

08/08/2008 09:21:06 PM · #11

Originally posted by bvlindalou:

just a fast edit.....I think it help alot.

Yes, it did. Even on my monitor at home, I can see some of the noise in the first one. Primarily in the lower right area. The background on the edit is much smoother.

08/09/2008 12:12:23 AM · #12

Originally posted by yospiff:

Originally posted by bvlindalou:
just a fast edit.....I think it help alot.

Yes, it did. Even on my monitor at home, I can see some of the noise in the first one. Primarily in the lower right area. The background on the edit is much smoother.

thank you for your suggestion. it helped so much.