One tool I have been finding very useful in Gimp lately is the Color Curves adjustment dialog so I figured I would make a quick tutorial or guide on it. I have been finding that it allows you to make nice smooth appearing adjustments to contrast in the image or layer you are working on. Often times I want to increase contrast just a little bit and this tool works very well. Here's an example of a crumpled paper image with the contrast increased for fun:
An Example Color Curve Adjustment to Increase Contrast
To bring up the Color Curves tool, navigate to Colors - Curves... and it will be displayed. The Color Curves tool will display the current layer's histogram in the background with a linear histogram adjustment line. You can also switch this to logarithmic in the upper right corner if you want but I usually find linear to work well for me. From here, you can adjust the histogram curve while watching the preview image to the contrast levels you like.
Color Curves Dialog in Gimp
The channel can be changed between the combined RGB, or the red, green, and blue channels individually. The alpha channel can also be selected and I have found this to be tremendously useful when adjusting layers with transparency and for making brushes for Photoshop or Gimp. Say we wanted to turn this crumpled paper into a brush for use later. After converting it to greyscale and converting white to your alpha channel, Color Curves can be used to adjust the histogram and resulting contrast produced by the alpha channel. This allows us to make the page 'crumbles' stand out more in our brush:
Example Adjustment on Alpha Channel with Color Curves
Well, that's all I've got to say about adjusting your images with the useful Color Curves dialog!
Posted: Sunday, April 20 2014
Posted: Sunday, March 23 2014
Posted: Friday, February 21 2014
Posted: Tuesday, February 11 2014
Posted: Monday, March 26 2012
Posted: Tuesday, January 18 2011
Posted: Thursday, December 23 2010
Posted: Monday, December 20 2010
Posted: Monday, December 20 2010
Posted: Sunday, November 21 2010
Posted: Saturday, December 10 2016
Posted: Monday, July 25 2016
Posted: Sunday, March 20 2016
Posted: Sunday, February 21 2016
Posted: Sunday, March 29 2015
Posted: Sunday, December 21 2014
Posted: Monday, October 27 2014
Posted: Sunday, March 16 2014
Posted: Friday, March 07 2014
Posted: Monday, February 17 2014
Share texturemate.com With Others!
Every resource provided on texturemate is considered completely royalty free! The stock textures, texture packs, brush packs, and any other resources available for download on this site are completely free and may be used in commercial or non-commercial applications. Credit to texturemate for use of available textures or brushes is appreciated, but not required. These textures may be used in 3D modeling software packages where their appearance is altered, such as Blender, 3DS Max, Solidworks, CAD, or Second Life. They may also be used in scrapbooking applications. The only exception is that they cannot be redistributed commercially in their unedited form. These textures cannot be re-packaged and resold without significant modifications to their appearance. Brush packs may be used to create unique images in Gimp or Adobe Photoshop, but they cannot be redistributed without being significantly edited. Any resource on texturemate may be linked to when sharing information or resources to others.