Download PTGui 12.21

A regularly discussed piece of software in the Photo & Video Workflow subforum is PTGui. This program focuses on creating and adjusting composite images. This can be a vertical or horizontal panorama, but also one large image with an enormous resolution that is composed of countless separate shots. With a stack of photos as input, the program can then figure out how to place them next to each other. For the calculation-intensive part, the GPU can also be used via OpenCL to be ready faster. It features various options, where PTGui Pro also makes it possible to combine HDR photos, mask moving objects and adjust the viewing point, among other things. Version 12.21 returns to the exposure fusion algorithm used in version 11:

Changes in version 12.21:

• Based on feedback from users, the exposure fusion algorithm is reverted to the algorithm that was used in PTGui Pro 11.

  In PTGui 12 the stitching pipeline was changed in order to support new HDR functionality and color management. This also changed the exposure fusion process. But users reported they were not able to get the same results as in PTGui Pro 11 and we agree that the results in PTGui Pro 12 were indeed inferior. To fix this, the exposure fusion algorithm from PTGui Pro 11 has been backported to PTGui Pro 12. Subtle differences between version 11 and 12 may remain, due to the fact that PTGui 11 was not color managed: the exposure fused results in PTGui Pro 11 would depend on the color space (in particular, the gamma curve) of the source images. PTGui Pro 12 is unaffected by this, it will produce the same results regardless of the source images’ ICC profile. But the difference is small and this can be compensated for by a small adjustment of the curve in the Post Processing tab.

  For backwards compatibility the algorithm of PTGui Pro 12.0 to 12.20 remains available, so projects created with previous versions will still look the same. New projects will use the PTGui 11 algorithm by default.