RadCor

RadCor is a program for correcting radial lens distortion and chromatic aberration.

Features:

Radial Distortion:
Radial distortion is most visible when taking pictures of vertical structures having straight lines which then appear curved.

This kind of distortion appears most visibly when the widest angle (shortest focal length) is selected either with a fixed or a zoom lens. It may be adequately corrected by applying a simple polynomial transformation.

Calibration:
These constants may be computed by photographing a structure or a target containing known straight lines, both vertically and horizontally.

Chromatic Aberration:
A facility is offered for selection of the correction constants for the red, green and blue components of a colour calibration image in the chromatic correction option.

Vignetting:
If the distribution of light at the sides of the image is not the same as nearer to the center, these portions of an image appear to be darker. The program can correct for simple symmetrical radial vignetting sometimes present at very wide angles or when lens hoods are used.