In this case this is not about correcting optical lens flaws but distortions created by using lenses to render three dimensional scenes on a two dimensional image plane.
We use ViewPoint from Lightroom (using "Edit in ViewPoint") but it also comes as a standalone app or Photoshop plug-in.
Correcting Volume Anamorphosis
Here is a sample shot with a wide angel lens you likely have seen before:
As you can see the head of the groom shows badly distorted. Nothing wrong with the lens because this is just the nature of the WA projection. By clicking on the right Anamorphosis correction button you get this result:
You can tune the result via the Intensity slider to get lower or even stronger corrections.
We start with this image:
In this case the distortion is mild but still worth to fix. ViewPoint has three tools for fixing keystoning:
- Vertical only
- Horizontal only
We use the tool that can correct in both dimentions.
You position the four points that show an area that should form a proper rectangle. The placing of the points is aided by a more precise Loupe view of the point you currently place:
Once you have placed all four point you click done and can view the result:
Often images don't look natural if they are perfectly corrected. ViewPoint allows to tune down the correction intensity. We use about 80% to slightly under correct the result.
ViewPoint can also perform the final crop of your image:
Overall DxO ViewPoint is easy to use. You maybe able to do the same in other tools but not nearly as fast and elegant. More about ViewPoint at dxo.com.
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