What is Curve Surgery?

Most Nikon DSLR's allow, through the use of Nikon Camera Control, to upload a custom curve into the camera. Unfortunately once the curve IS or ISNT embedded into your NEF file there is no way a changing that curve in Nikon Capture.

Curve Surgery allows you to extract/create/edit/embed curves to and from the NEF files.

So what?

The image that is displayed in Nikon Capture is AFTER the default curve or your in-camera curve has been applied. If your curve clips highlights badly, or you under/overexpose there is little way of reversing this effect. All other curves and levels edits in Nikon Capture are applied over the top of the default/user-defined curve.

And?

With Curve Surgery you can adjust these curves to your liking and then embed them back into a file. This means you are able to do some impressive post-editing at the most basic level of the RAW data.