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long exposure noise (1 image)
My thanks in advance to those reading and responding to the thread..

I'm aware that high ISO means introduction to noise, but also noticed that my camera, a Sony R1, occasionally shows noise in the shadows, especially in long exposures. Here's a still of a leaf that shows noise in the shadows ( reduced size ).

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

I tend to avoid doing noise reduction usually, as a) the default settings soften the images too much for my liking b) I struggle with the noise sliders to get a good look and c) i'm not familiar with the approach and where to do noise reduction in the workflow..

I'm presenting my workflow for the above image. Could the experienced photographers kindly suggest at what stage, and how, I should do noise reduction?.

1. Shot in raw2. No WB changes3. Capture sharpening4. Some selective sharpening over leaf and avoiding white background5. Local contrast enhancement6.



Your suggestions for improving my workflow are greatly appreciated.-AP.

___________________TGAITM________________________.

'For my part, I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to move.' - RL Stevenson..

Comments (5)

It might be my eyes (or my monitor), but I don't see a noise problem in this image. Ok, if you REALLY look for it with the microscope, it might be there, but I really don't think you should trouble yourself too much with noise. Especially for prints, I've printed 3200 ISO photos (from a Nikon D40, admittedly) and there is very little noise visible,.

But in any case, regarding your question, I'd advise you to run the noise reduction process just before the final sharpening. In other words, do everything else (e.g. levels, brightness & contrast) first, resize (if needed), then noise reduction, then sharpening..

As for noise reduction, there are a lot of good programs/plugins out there. The one I use is NeatImage. Really good, a lot of customization for the advanced user, but also a nice "default" that will do the work for you without much fuss..

Http://www.flickr.com/photos/96953368@N00/..

Comment #1

I see some posterization (micht be my crappy dell laptop screen), but no noise..

AnuragP wrote:.

My thanks in advance to those reading and responding to the thread..

I'm aware that high ISO means introduction to noise, but also noticedthat my camera, a Sony R1, occasionally shows noise in the shadows,especially in long exposures. Here's a still of a leaf that showsnoise in the shadows ( reduced size ).

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

I tend to avoid doing noise reduction usually, as a) the defaultsettings soften the images too much for my liking b) I struggle withthe noise sliders to get a good look and c) i'm not familiar with theapproach and where to do noise reduction in the workflow..

I'm presenting my workflow for the above image. Could the experiencedphotographers kindly suggest at what stage, and how, I should donoise reduction?.

1. Shot in raw2. No WB changes3. Capture sharpening4. Some selective sharpening over leaf and avoiding white background5. Local contrast enhancement6.



Your suggestions for improving my workflow are greatly appreciated.-AP.

___________________TGAITM________________________'For my part, I travel not to go anywhere, but to go. I travel fortravel's sake. The great affair is to move.' - RL Stevenson..

Comment #2

I see posterization too, and yes, it's the laptop's monitor - I've checked it on the desktop's monitor and it's fine..

Http://www.flickr.com/photos/96953368@N00/..

Comment #3

It might be my eyes (or my monitor), but I don't see a noise problemin this image. Ok, if you REALLY look for it with the microscope, itmight be there.

Thank you for your analysis, Ancient_Mariner. Initially I thought that the shadow area at and near the stem showed noise. So, I went back to the leaf that was photographed and saw fine brown hair/ fuzz in that area. It might be that what I am confusing with shadow noise is fine detail that digital cameras (at least the bayer interpolation ones) have difficulty resolving. I have seen this kind of mush before on eyebrows, trees, etc. Please find a full size crop below without capture sharpening, and see whether it is noise or just digital mushing of detail..

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

But in any case, regarding your question, I'd advise you to run thenoise reduction process just before the final sharpening. In otherwords, do everything else (e.g. levels, brightness & contrast) first,resize (if needed), then noise reduction, then sharpening..

Thank you, again, for the useful advice.-AP..

Comment #4

Thanks for you comment, Sigezar. I, unfortunately, also do photo edits on my laptop screen- but do not see posterization on this one. Maybe the LCD did not handle tonal gradations very well? Setting the Display Properties->Settings->Color quality to 32 bit might help, or, maybe, there is posterization as you indicated, but that I'm unable to discern..

-AP..

Comment #5

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