Hi Rob, Welcome back. You're probably the list expert in the area of perspective control. Can you elaborate? Paul On Jul 21, 2006, at 10:49 PM, Digital Image Studio wrote:
> 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 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
