Yes, thanks. I did mean perspective. Now operating on more coffee.
Chuck Norcutt
Wayne Harridge wrote:
>> 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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