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 Apply Brightness/Saturation to a Selection only		  New Topic  Reply to Topic
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AndyColmes

USA
351 Posts
Posted - Jan 04 2012 :  07:50:25  Show Profile  Reply
I would like to apply or change Brightness/Saturation in an image but only specified in a Selection. How can I achieve this?

Thanks.

fab

1310 Posts
Posted - Jan 04 2012 :  09:48:34  Show Profile  Reply
Let the user to select a region (in this case a rectangle, but other shapes are available), with:

ImageEnView1.MouseInteract := [miSelect];

Then change brightness/saturation, for example (other ways are available), with:

ImageEnView1.Proc.AdjustBrightnessContrastSaturation(....);

You can also select a region in-code. Example:

ImageEnView1.Select(x1, y1, x2, y2);
ImageEnView1.Proc.AdjustBrightnessContrastSaturation(...);

About Select usage look also TImageEnView.SelectionBase.
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AndyColmes

USA
351 Posts
Posted - Jan 06 2012 :  07:39:10  Show Profile  Reply
Thanks Fabrizio. It looks like adjustments are confined to a selection if there is one, if not it affects the whole image.

What the recommended limits (min/max) for the Brightness and Contrast values?
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w2m

USA
1990 Posts
Posted - Jan 06 2012 :  14:37:32  Show Profile  Reply
Brightness can assume values from -100 to 512.
Contrast can assume values from -100 to 100.
Saturation can assume values from 0 to 512.

William Miller
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AndyColmes

USA
351 Posts
Posted - Jan 07 2012 :  01:14:20  Show Profile  Reply
Thank you William.
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