On 22/07/06, John Francis <[EMAIL PROTECTED]> wrote: > 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.
Using my method aspect ratio is preserved, however I rarely use it these days, I far prefer Hugin or similar transform tools, they are more accurate and significantly more flexible. -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
