PBR Calibration Tool v0.1 (alpha)

Free for non-commercial use.

This is a tool for calibrating colours and exposure levels using a Macbeth chart (i.e. X-rite ColorChecker Passport)

It's intended for calibration of PBR textures, but could be used by anyone who needs accurate colours and exposure levels.

You will probably get a warning from Windows when you install this because I haven't purchased a trusted software certificate. 

User guide

• Start by loading your Color Checker Image. This should ideally be a 16-bit file, or a raw file. Check raw file conversion for raw files.
  
• position the grid over the color-checker by moving the blue corner points
  
• (optional) Change options. It's usually best to use "Linearize" with non-raw images. 
• Click Calculate. This updates the average Error. A good value is around 1-2.
• (optional) Preview the colour transformation
• You can either save the reference image, or save a target image (without colorchecker, but with same exposure settings) 

Future versions might include:

• automated chart detection
  
• batching
  
• 32-bit support?
  
• different reference chart types
  

Feel free to email me with feature requests or if you encounter any bugs.

joost3d@gmail.com