Here is how I would tackle it. I use PS7
http://www.pbase.com/image/29108697.jpg
Pull out your work area to give a little room
Rename background layer to unlock it
Try to retain the overall image shape by setting up 3 guides:
a horizontal line across the middle and a vertical near each side of the picture. Orient them so that an object is placed where the lines cross.
Use free transform to push and pull the corners horizontally. Avoid vertical changes. Maintain the overall dimensions by trying to keep the reference objects at the guide points while making building edges parallel to the guides.
Render the transformation, clear guides and crop the angled edges.
I did a little picture tutorial for a friend that uses a different image.
http://www.pbase.com/image/24642500


bill1 wrote:
> Firstly, I do persspective correction using the crop tool. I see
> you can do it using free transofrm too. Is there a good tutorial
> on this? I find the help files that come with CS to be sadly
> lacking.
>
> Anyway this is the image I want to correct:
>
> http://www.pbase.com/image/29107709.jpg
>
> This is taken standing on a bridge, converted from 300D RAW. The
> bridge is about 6 metres above the river and the same level as the
> white "banister" railing in the center right of the image. I want
> to correct the perspective on it. Thing is, the perspective seems
> to steepen as is clearly visible from the ladder in the bottom
> right of the image. If I align the crop tool to eithe rthe windows
> in the top right or the ladder in the bottom right the perspective
> of th eother looks wrong.
>
> Whats the cause of this? Lens problem? This is an 18mm shot with
> the 300D kit lens. I really like this photo so I want to make a
> nice copy of it.
>
> Also, this got me to thinking. The typical perspective correction
> scenario is for you to be standing at the bottom of a building that
> rises above you. What is you want to correct something that goes
> both above and below you? The perspective will recede in both
> directions won it? This is why I mention that I'm standing above
> the river, because I thought this might be the problem. I may need
> to correct the horizon too but its hard to tell that from this
> image.
>
> Please help.
>
> --
> 'A colour-sense is more important, in the development of
> the individual, then a sense of right or wrong.'
> -- Oscar Wilde

--
Joe Filer
Mahomet, IL
http://www.pbase.com/image/15258004.jpg
www.pbase.com/filer