Mike Chaney's Tech Corner

Is there a function in Qimage for correcting converging verticals?   I know I can do it in Photoshop but prefer to do all my printing in Qimage.

Regards.

If Converging verticals is another way of saying lens distortion, then yes, there's a system in Qimage for that.
Mike has built into Qimage, distortion correction for a number of cameras and lenses.
The best way is for you to contact Mike    mchaney@ddisoftware.com and tell him you would like lens correction.
He will reply telling you the shots he needs.
Then your correction will be inside Qimage, and automatically correct your lens distortion.
Fred

Fred, no, it does nor mean that. Fencer means what I would call perspective correction used for architectural subjects in particular.
An example would be where the top of a building looks narrower that the bottom and you want the verticals to look verical and parallel.
So, no QU does not do that.
Terry

Thanks both;but Terry's right. It's just as I feared and it leaves me with two choices. Either Use Photoshop or lash out on one of Canon's rise and tilters. That's a lot of money for a limited use lens so I'll probably stick to P/S for the moment. It's a bit of a guddle to use as when you've finally managed to stretch the top of the verticals out to parallel you discover the whole building has shrunk in height and now it has to be pulled up again.

I've noticed a big increase in their use by estate agents, (realtors), in recent years, sometimes with very strange effects as the top of the buildings can look wider than the base.

Anyway, thanks guys.

D.

Just to add to my previous post and re.
If you do not have some other editor that will easily correct perspective (converging verticals etc.), The PT Lens by epaperpress.com is a cheap software solution.
http://epaperpress.com/ptlens/index.html (http://epaperpress.com/ptlens/index.html)
It will also correct barrel distortion on many lenses.
Price: $25
See attached sample of an image where I recently used PT Lens to correct perspective. I particularly like that it automatically saves the corrected image to a new file.
Terry

You could try GIMP.  That's free.  :)

Mike

Thanks Terry.
That is a very handy little prog,

Jeff

Good suggestions. Thanks.

I check out the Gimp program. It seems it will only operate in sRGB colour space (I could be wrong about that) and the perspective correction tool was a little strange.
The the tool puts grid lines over the image but when any correction is applied, the grid distorts too. Apparently you have to draw some extra guide lines that do remain as a rectangle.
Terry