Dynamic Photo HDR

22 Dynamic Photo HDR

You then move to different place of image, align the view and add another Vector.

In theory, the red lines will intersect at the actual center of rotation.

With only a small offset adjustments the lines will not all cross at one place but rather converge to the

part of the image where the center of rotation is. In many cases however, the center of rotation is

usually outside the image borders.

In many cases a camera angle misalignment is not by a pure camera roll, but also combination of yaw

and pitch. Instead of trying to figure out the angle and center of rotation, we added a more robust and

simpler system called Pin Warping.

Quick Preview

This will quickly merge the images into HDR and tone-map it (using Auto-Adaptive setting) for a

preview. This is a great way to determine if all images are aligned or if there is any ghosting (by

moving people, cars, foliage)

3.5 Pin Warping

Unfortunately an offset misalignment is not the only alignment problem we will encounter if taking

images by hand. A camera shake or movement is often more just an issue of horizontal or vertical

offset. In most of the cases camera will also rotate slightly in the three dimension changing Yaw, Pitch

and Roll angles.