Why so grainy?

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Why so grainy?

Post by mrsjones on 2009-02-14, 22:00

I'm very new to HDR just trying to work my own style out.I would like to ask why my processed hdr-s are so grainy?I like them as they are but sometimes I would like to have some cleaner one as I see some guys have some real beauties.My questions might sounds silly Embarassed in that case I do apologize my only excuse is that I'm only learning.Thanks a lot.P.S. I'm using Photomatix.
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Re: Why so grainy?

Post by amyandmark3 on 2009-02-14, 22:05

Can you post an example?
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Re: Why so grainy?

Post by mrsjones on 2009-02-15, 05:56

I'm trying to upload an image but for some reason cannot succeed.Am I really that bad? pale I defenitely do something wrong.
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Re: Why so grainy?

Post by SpiffyPix on 2009-02-15, 06:11

Hi - There is a thread on the home page of how to upload images; If you're still having problems, lemme know and I'll help you out.

I have a feeling that the noise could be coming from over processing, but I could be wrong. What program are you using? In Photomatix, there is a micro tab. If you have the micro contrast tab too high and the smoothing too low, sometimes you get that problem...

Melanie

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Re: Why so grainy?

Post by mrsjones on 2009-02-15, 20:46

Melanie, thanks very much for your advice with the tone mapping set up I tried the sliders as you said and works fine.... Hurray thanks Melanie!!! Is there any particular set up for those sliders?What is your preference?Until I don't create my own style (still long time) at least I should listen to the clever's advice.Thanks a lot.
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Re: Why so grainy?

Post by amyandmark3 on 2009-02-15, 21:12

If you look about 1/2 way down this tutorial:

Photomatix Tutorial

You will find this person's "default" settings. I often begin with these settings as a baseline and then move the sliders to my preference for each different photo.

Another option I use is: Once I generate an HDR and open the tone-mapping window, I click on the DEFAULT button at the bottom left and then adjust the sliders to my preference.

Hope this helps a little. Smile
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Re: Why so grainy?

Post by mrsjones on 2009-02-16, 07:26

WOW!!! this is some tutorial, thanks a LOT and thanks for the advice, Hurray I'm happy I will have some beautiful HDRs.Thanks again!
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Re: Why so grainy?

Post by cswift1 on 2009-03-01, 17:53

Some very general tips for those "problem" effects in Photomatix.

Noise Reduction:
Lower the Luminosity
Lower the Strength
Raise the Black Point
In the Color tab, Lower the Shadows Saturation for color noise
Under the S/H tab, Raise the Shadows Smoothing and Shadows Clipping

Lowering Grain
Lower the Strength
Lower the Luminosity
Raise Microsmoothing
Lower Microcontrast

Just a thought. Hope it helps.
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