Image correction
Moderators: XnTriq, helmut, xnview
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- Posts: 118
- Joined: Sat Jul 30, 2005 10:26 am
Image correction
It would be cool to have an option to do some auto-correction of images (brightness, contrast, gamma, ...). Are there some algorithms to estimate "good" values?
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- Author of XnView
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Re: image corretion
You have auto levels and auto contrastthire wrote:It would be cool to have an option to do some auto-correction of images (brightness, contrast, gamma, ...). Are there some algorithms to estimate "good" values?
Pierre.
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- Posts: 118
- Joined: Sat Jul 30, 2005 10:26 am
how
Hi Pierre:
Can you explain how do you apply auto levels transformation?
I know how Photoshop does it because it is explained at its help. They cut the histogram at the tails by 0.5% of the values previous to the expansion. Are you making any of this? It is important to me to know if I will loos some values if I apply auto-levels and how many.
Congratulations for your work!
Can you explain how do you apply auto levels transformation?
I know how Photoshop does it because it is explained at its help. They cut the histogram at the tails by 0.5% of the values previous to the expansion. Are you making any of this? It is important to me to know if I will loos some values if I apply auto-levels and how many.
Congratulations for your work!
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- Author of XnView
- Posts: 44821
- Joined: Mon Oct 13, 2003 7:31 am
- Location: France
Re: how
Yes i cut histogram toogeometra wrote:Hi Pierre:
Can you explain how do you apply auto levels transformation?
I know how Photoshop does it because it is explained at its help. They cut the histogram at the tails by 0.5% of the values previous to the expansion. Are you making any of this? It is important to me to know if I will loos some values if I apply auto-levels and how many.
Congratulations for your work!
Pierre.