CornerFix for Windows is a small utility program designed to fix the "Cyan corners" problem, caused by color dependent vignetting, with Leica M8 digital cameras using IR filters. It has two main functions: to correct theraw M8 DNG files for vignetting, based on a devignetting profile, and to generate a devignetting profile from a flat field reference image.

CornerFix corrects for vignetting effects in digital images. It's most often used to correct for the color vignetting that occurs when wide angle lenses are used with digital sensors that include IR filters, resulting in so-called "Cyan Corners".

CornerFix can also be used to correct for simple optical vignetting, correct more complex effects e.g., "Italian flag" syndrome.

It has two main functions: to correct the raw M8 DNG files for vignetting, based on a devignetting profile, and to generate a devignetting profile from a flat field reference image.

Features

Corrects for multiple vignetting related issues - "cyan corners, "red corners", "Italian flag syndrome", etc, etc
Either Mac or Windows versions
Works with almost all cameras - any image that can be converted to DNG form
Allows the use of lens not supported in the camera's firmware, or not coded
Allows corrections to be adjusted separately for luminance and chroma
Corrects at the raw data level, so any raw developer can still be used, e.g., C1, Lightroom, etc
Profiles for any aperture and/or and lighting can be produced
Free – distributed under the GPL. Note that some portions are copyright Adobe.
When used with Leica M8 or M9 cameras, decodes the Leica MakerNotes, and can optionally update the DNG file's EXIF data with an estimated aperture value

New Release
All Platforms: Fix for a potential batch conversion problem
[ CornerFix release history ]

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