PhotoDemon provides a dedicated lens distortion correction tool. By “tugging” at the corners of the image, it is possible to undo anything from slight distortions to ultra-wide fish-eye transformations. An integrated zoom parameter lets you control how much of the image you are willing to sacrifice to the correction.
Like other distortion tools in the program, five options are provided for dealing with off-canvas pixels (clamp, erase, ignore, reflect, wrap). A dedicated Quality option uses bilinear interpolation to further improve the quality of the final image.
Finally, like all PhotoDemon tools, a dedicated command bar allows you to save and load custom presets, randomize parameters, and reset to default values. Last-used settings are automatically saved and restored, and all changes provide a real-time preview (no click or mouse button release required).