On Fri, Jul 21, 2006 at 10:15:17PM +1000, Digital Image Studio wrote: > On 20/07/06, Jaume Lahuerta <[EMAIL PROTECTED]> wrote: > > But...is it possible to correct perspecive without > > distorting other parts of the picture? > > > > I always get the same effect as Brian, I correct the > > perspective (with the Photoshop feature) but the > > building doors are squashed vertically. > > > > Is there another way to do it? > > http://home.swiftdsl.com.au/~distudio/perspective/#CorrectionusingPhotoshop
Or, as Paul suggested, simply stretch the image vertically after you've applied the perspective adjustment transform. The problem is that the perspective correction only stretches the image horizontally (by different amounts depending on how far up the image you are). This means that the (un-stretched) verticals appear squashed by comparison. To remove the squashed appearance you need to stretch the image in the vertical direction by some intermediate amount; not as much as the top of the image is stretched horizontally. A rough rule of thumb is to stretch it so that the expansion matches that applied at eye level by the perspective adjustment, but that's only a guideline - I find doing it by inspection is about as good, and involves far less calculation. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
