Chromatic Aberration
Chromatic aberration is a lens artifact that can result in fringes in high contrast areas of some photos. The camera lens can cause some wavelengths of light to focus differently, which appear in photos as colored fringing or colored lines on the borders of high contrast areas. Purple fringing can also occur when there is a bright spot of light in front of the lens.
This zoomed-in image shows an example of blue/yellow fringing.
The Chromatic Aberration filter is used to reduce the appearance of colored fringes, which can be especially useful for photos with architectural details. For best results, it's recommended to use the Chromatic Aberration sliders first, and then the Defringe sliders.
To reduce fringing in an image:
- Select Filter | Repair | Chromatic Aberration from the main menu.
- Adjust the sliders as described below.
- Do one of the following:
- Click OK to accept your changes and close the panel.
- Click Cancel to discard your changes and close the panel.
Right-click a slider to reset to the default value.
Chromatic Aberration Options
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Fix Red/Cyan |
Adjust the red and cyan channels to reduce red/cyan fringing. |
|
Fix Blue/Yellow |
Adjust the blue and yellow channels to reduce blue/yellow fringing. |
|
Defringe strength |
Adjust the amount of fringe color to be removed from high contrast edges. A setting of zero means that defringing is off. |
|
Defringe radius |
Adjust the number of pixels surrounding an edge that will be defringed. |
|
Fringe color |
Adjust the color to remove from high contrast edges. |
This filter features a Pixel Targeting tab (see Pixel Targeting for more details). 
Use the Edit Brush to paint this effect onto specific areas of the image. 
Use the Gradient tool to transition this effect across specific areas of the image. 
Use the Radial Gradient tool to apply effects around, or directly to, a center point. 