I’ve just sent a message to Tom Niemann of ePaperPress.com, the author of an excellent Adobe Photoshop plug-in called PTLens.

Hi Tom,

I use your PTLens plug-in regularly for fixing my photos – thanks.

Many of my photos are of buildings taken from a low vantage point. When taking the photo, I usually try to ensure that my central vertical is actually vertical. In PTLens, it would be great to have a slightly different colour of red for the central vertical in a photo. This would help me to get the correct rotation for each photo.

Furthermore, I find I am guessing about the vertical perspective. However, most of the time I can accurately place the horizon. If I could put a horizon line on the photo, I believe it would be possible to calculate the required vertical perspective correction from the focal length and the position of the horizon. Alternatively, and perhaps much easier to implement, when adjusting the vertical perspective, a horizon bar (e.g. a lighter red line) moves down (or up) the image.

Finally, I follow my PTLens adjustment with a crop. Are there any plans to put a crop (with optional retain image width/height ratio and optional resize to original image width/height) on PTLens? This isn’t essential – it would be a nicety.

Thanks again.

Wooh. I’ve just read the bit at the top. I hope you have a great time in Antartica.

Cheers, Reggie