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Subject: Contrast Node? Looking for node to control image contrast.

byAnton opened this issue on May 10, 2005 · 12 posts
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byAnton ( ) posted Tue, 10 May 2005 at 11:02 PM · edited Sun, 17 November 2024 at 8:18 PM

The HueSaturationValue node is nice but washes out contrast. Anyone play or find a way to control contrast??? Any ideas? Am I missing an obvious node?

-Anton, creator of Apollo Maximus
 "Conviction without truth is denial; Denial in the face of truth is concealment."


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AntoniaTiger ( ) posted Wed, 11 May 2005 at 12:48 AM

"contrast" can mean slightly different things in different contexts, and I know that some high-contrast effects can be achieved by modifying what some software calls "gamma". It may be that one of the colour math nodes could be set to get what you want -- some sort of multiplication by a non-linear function.

byAnton ( ) posted Wed, 11 May 2005 at 12:53 AM

Yeah. I wish I knew more about the math functions.

-Anton, creator of Apollo Maximus
 "Conviction without truth is denial; Denial in the face of truth is concealment."


Over 100,000 Downloads....

byAnton ( ) posted Wed, 11 May 2005 at 1:07 AM

Can someone more familiar explaint o me the effects from the various Post Filter types?

-Anton, creator of Apollo Maximus
 "Conviction without truth is denial; Denial in the face of truth is concealment."


Over 100,000 Downloads....

Ajax ( ) posted Wed, 11 May 2005 at 2:27 AM

"Post filter types"? You mean some of the nodes? Which ones did you have in mind?


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byAnton ( ) posted Wed, 11 May 2005 at 3:30 AM

The post filter question was in regards to anti-aliasing styles, seperate from the original question about using nodesto control image contrast

-Anton, creator of Apollo Maximus
 "Conviction without truth is denial; Denial in the face of truth is concealment."


Over 100,000 Downloads....

Ajax ( ) posted Wed, 11 May 2005 at 6:16 AM

Oh OK. The manual has a reasonable description (p348). Stewer has some info at his site too (I don't have the URL handy though).


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Rance01 ( ) posted Wed, 11 May 2005 at 8:31 AM

Attached Link: http://www.keindesign.de/stefan/poser/index.html

Here is a link to Stewer's Site. Best Wishes, Rance

stewer ( ) posted Wed, 11 May 2005 at 11:22 AM

file_236400.jpg

This would be an example of using the gain function to change contrast (change the number in the math node to set contrast - try values between 0 and 1).

stewer ( ) posted Wed, 11 May 2005 at 11:26 AM

file_236402.jpg

This setup is for gamma correction - change Value_1 of Math_Functions_2 to set the gamma value.

unzipped ( ) posted Wed, 11 May 2005 at 12:39 PM

bookmark

byAnton ( ) posted Wed, 11 May 2005 at 1:29 PM

I really appreciate that info. Thanks!!!!!! I read the p6 on the short post filer style but I don't understand what it does. AKmaterialroombookmark

-Anton, creator of Apollo Maximus
 "Conviction without truth is denial; Denial in the face of truth is concealment."


Over 100,000 Downloads....

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