Other Explanations
Purple fringing is usually attributed to chromatic aberration as described above, although it is not clear that all purple fringing can be explained this way. Other attributed causes of purple fringing in digital photography include many hypothesized sensor effects:
- Digital noise in dark areas
- Image processing and interpolation artifacts (almost all CCDs and CMOS require considerable processing)
- Stray ultraviolet and/or infrared light
- Image bloom from overexposure of CCD sensor (not applied to CMOS)
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