CornerFix

CornerFix is a lightweight Windows application developed to help you enhance your photo quality (DNG file format) by correcting the “Cyan corners” problem usually caused by color vignetting issues that may appear while taking photos with Leica M8 digital cameras using IR filters.

The tool was originally developed for the Leica M8 cameras but it offers support for any DNG files.

Since this is a portable program, it is important to mention that it doesn’t leave any traces in the Windows Registry.

You can copy it on any USB flash drive or other devices, and take it with you whenever you need to apply some photo correction operations on the breeze, without having to go through installation steps.

It sports a clean and intuitive layout that allows you to carry out most operations with minimum effort. Plus, it offers support for a dual panel, where you can analyze the original and edited image.

The program gives you the possibility to upload files into the working environment using the built-in browse function, so you cannot rely on “drag and drop” operations.

Basically, CornerFix makes the correction process seem nothing but a piece of cake, as it automatically analyzes the vignetting-related issues, such as “Cyan Corners” or “Red Corners,” and creates a lens profile.

It is important to mention that the utility applies the corrections to the raw data level, so you can still process the photo with dedicated tools, such as Lightroom.

The app lets you manually adjust the luminance and chroma filters, use lens profiles for correcting the current image, apply anti-aliasing options, as well as compress the items. CornerFix offers support for batch processing, which means you can add multiple DNG items and process them at the same time.

CornerFix offers a handy set of parameters for helping you fix vignetting-related issues with your photos. As a drawback, it doesn’t come packed with a library of preset lens profiles, so you have to create them on your own.