DxO Labs have released DxO Perspective for Mac OS X, an application designed to correct perspective and horizon problems. In architectural or urban photography, depending on the position of the photographer with respect to the scene, buildings’ vertical and horizontal lines can lose their parallelism. DxO Perspective corrects all kinds of perspective problems, and restores balance and authenticity to landscape photos by perfectly straightening a slanted horizon. DxO Perspective for Mac OS X is immediately and exclusively available in the Mac App Store. The software is free through 3rd November.