De-light Photoshop Action (Free)

A photoshop action to remove lighting from a photo or texture.

Load it through the action window.

1- Make sure to name the target layer: delight

2- Must mask out or crop on only the part you want processed. Since one of the steps is an Average blur, any other colors like from a dark background will contaminate the colors of the part you want. Always isolate the region before running the action.

3- After the action runs you can go into the high pass smart layer and double click it to change the value while seeing the results interactively.

Based on a tutorial posted by Eugene Fokin