> When
> we correct
> distortion with software we pay a price in resolution from having
> expanded some pixel locations. Of course, we pay the same
> sort of price
> in using a shift lens which probably does not have the same
> resolution
> at far (shifted) edge as in the center.
Did you mean "perspective" correction here ?
Converging verticals isn't a lens distortion, just a result of geometry when
you tilt the camera.
While correction of linear distortion will probably be achieved by similar
means (stretching/shrinking some areas of the image) the loss of image
quality is likely to be much less than that introduced when correcting
perspective when you tilt the camera by a few degrees.
...Wayne
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