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Photoshop plug-ins for retouching

Video introducing the Photoshop plug-in

Chromatic Aberration

An example of transverse chromatic aberration

In this example we see the corner of a large image with transverse chromatic aberration. (Camera = Canon PowerShot G9)

Quick introduction

Most lenses produce chromatic aberration (a special kind of colorfringe). Quickly and easily correct this with this Power Retouch Photoshop plugin. Corrects both transverse and longitudinal chromatic aberration. This is the Chromatic Aberration pluginís control panel. Click on the image for a larger view. It works with the following image modes: 8 & 16 bit/channel: RGB, CMYK.

Two types of aberration

The most common chromatic aberration is the colored fringe that becomes more and more prominent as you move from the centre to the corners of the image. This is known as transverse aberration. The first three controls fix this for each colorchannel. A less severe chromatic aberration is when the colors do not focus evenly on the image sensor. This is known as longitudinal aberration.
Original
After correction

Purple fringe or chromatic aberration?

Colorfringes occur when photographing a dark object against a bright lit background and they are usually purple. They are not regularly distributed over the image and are larger and more specular than chromatic aberration. Unfortunately chromatic aberration and purple fringes often appear together as in this example. The technology needed to correct a purple fringe is different and more complex than the fairly simple technology needed to remove chromatic aberration. Therefore we have a Photoshop plug-in dedicated to color fringes and a plug-in dedicated to chromatic aberration.