Purple Fringing Artifact Reduction

A processing device for reducing purple fringing artifacts within a digital image, the processing device comprising:

• a linear filter to be applied to the digital image to identify at least one purplish candidate region within the digital image;
• a purple fringe detector to identify, as damaged, pixels in the at least one identified purplish candidate region and within a predefined distance of a high gradient region;
• a mapper to create a map of damaged pixels based on the pixels identified as damaged by the purple fringe detector;
• and
• a purple fringing reducer to reconstruct the damaged pixels using interpolation with guidance from a green channel.

A tangible machine-readable medium having information stored thereon for at least one processor, the information comprising:

• instructions for applying a linear filter to a plurality of pixels of a digital image to identify ones of the plurality of pixels in at least one purplish candidate region within the digital image;
• instructions for detecting a high contrast region within the digital image;
• instructions for identifying, as damaged, ones of the identified ones of the plurality of pixels in the at least one purplish candidate region that are within a predefined distance of the detected high contrast region and forming a map of the damaged pixels;
• and
• instructions for using the map of damaged pixels to reconstruct damaged ones of the plurality of pixels of the digital image based, at least partly, on interpolating, with guidance from a green channel, non-green channel values of undamaged pixels on a fringe boundary.