Luminosity Masks Revisited
Using Luminosity Masks, you can very selectively control which regions of an image that you want to focus on, and can modify only that region specifically
Luminosity masking is a method for generating image masks that are based on the relative lightness of areas in an image.
This allows you to create a mask that is self-feathering and focused on a specific tonal range. This tutorial walk through the method for creating these masks manually in GIMP, as well as including a Script-fu for automatically creating these masks from your images.
For example, here is a set of masks based on increasing levels of lightness, and one based on levels of darkness:
Here is a simple split-tone example using these masks:
The mid-tones mask can also be used to really add a nice touch of contrast and slight saturation boost to images as well (see the tutorial for examples).
View the Tutorial →