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Zeus

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Reply with quote  #1 

Hi~guys~
I'm trying advanced fuctions of PIE recently.
In this case, I used ''curve'' .
Day Bedroom.jpg
Preset:3_interior_high
  
I can feel there is a subtle change happens.
But I couldn't describe how it really does.
Any tips or examples for ''curve''?

Zeus 



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JustinSlick

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Reply with quote  #2 
This is great, actually I think you nailed the post processing on this one!

For curves, there are a few examples, and some explanation here:  http://suplugins.com/podium/help/pie-whatsnew.php#curves

These are the basic things to know:
  1. The center point represents 50% gray.
  2. The right side of the curve (from the center point to the upper-right corner) affects the brighter regions of your image. From 50% gray to pure white in the upper right.
  3. The left side of the cure affects the darker regions.  From 50% gray all the way down to black in the bottom left.
[curves] 

When the curve is pure diagonal like that, it represents the current brightness values in the raw render (your starting point, in other words).

  • If you place a point on the curve and pull it up it means you're raising the brightness of that region.
  • If you place a point on the curve and pull it down you are darkening that region of the render.

The classic example is a simple contrast adjustment.  When you increase the contrast of an image, you are brightening the highlights, and darkening the shadows.


[increase-contrast] 

So we get an S shaped curve.  We are raising the highlights on the right side of the curve above their starting values, and darkening the shadows on the left side of the curve.The power with the Curves tool is that it gives you the ability to perform "targeted" brightness adjustments by changing the shape of the curve. 

Now if you wanted to be more precise, and only wanted to target shadows for example, you could do something like this:


[deepen-shadows] 
[darken-shadows-ex] 

In that example the mid-tones and highlights do become slightly darker, but the majority of the changes are in the shadow region on the far left side.

Anyway, this function is based directly on Photoshop's curves tool.  So if you want more examples, you can find a ton of information by searching for the Photoshop Curves tool on Google or Youtube. 

Photoshop's curves tool lets you manipulate each color channel individually which is super powerful, but the PIE version is great for basic targeted brightness/contrast adjustments.

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Zeus

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Reply with quote  #3 

Thanks for Justin's detail replies.
It's very useful for me.

Although curve of PIE is not as powerful as PS.
But I think it would be enough for me if I used it well.
I should do more practices on that.

Hope you guys learn a lot from Justin, too.  

Zeus


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davew

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Reply with quote  #4 
We do have a plan to develop some presets for Curves, although it's not priority right now but I think well designed presets for Curves might be helpful.
Zeus

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Reply with quote  #5 

Quote:
Originally Posted by davew
We do have a plan to develop some presets for Curves, although it's not priority right now but I think well designed presets for Curves might be helpful.

That will be helpful and easier for us!


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arqcova

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Reply with quote  #6 
Great! never used the curves, I think I need to give them a shot soon
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JustinSlick

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Reply with quote  #7 
One thing I'll add -- Those images were made with a very early version of the PIE curves tool, and at the time there was no interpolation/smoothing when you moved a control point.  It was just a linear connection between each point, so if you wanted a certain shape you had to add several extra points.

Now that the tool automatically smooths the line, it's better to place as few points as possible.  The 7 points on the first curve could easily be reduced to two or three for example.

cleaner-curve.jpg 


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