Photomatix Pro 2.2 Help 14
X - Advanced image alignment
Photomatix requires differently exposed source images that are perfectly aligned, i.e. images that
register exactly if superposed one upon another. For digital capture, the best way to ensure image
alignment is to use a tripod when taking the bracketed exposures. This may not always be possible
though, and even with a tripod, mis-registration can occur by accident in case the tripod shifted
slightly. Moreover, in the case of scanned films, alignment is almost never ensured.
Photomatix offers an automatic alignment option for HDR Image generation and all combination
methods. The alignment performed when checking this option is robust and fast. However, it corrects
only for horizontal and vertical translation shifts and not for potential rotational shifts. If you have
checked the option Align images and still notice some misalignment problems on the resulting image,
then it is worth trying the semi-manual advanced alignment tool under menu "Utilities->Advanced
Align".
To use the semi-manual advanced alignment tool:
1.
If not already done, open all images belonging to the same scene. If you have already open
images of another scene, you will need to close them.
2.
On the Utilities menu, click on Advanced Align and then Semi manual.
3.
Select the first control point. To do this, locate a detail that has not moved between the shots.
Click on the detail in the left image, then click on the same detail on the right image.
4.
Select the second control point. To do this, locate another detail that has not moved between
the shots and that is not too close from the detail clicked in step 3 (you can use the horizontal
and vertical sliders to move in the image). Click on this other detail in the left image, then click
on the same detail on the right image.
5.
If they are moving objects in your scene, it is recommended to remove them from the alignment
computation. To do this, press the CTRL key while selecting on the right image the area
delimiting the moving objects.
6.
Once both control points are selected, click on the Align button to launch the alignment.
7.
If you have opened more than two images, a message will prompt you to align remaining
images. Once all images are aligned, you can directly generate an HDR image or combine your
images with one of the "Highlights & Shadows" methods. Due to the alignment, you may have
to crop the resulting image produced by Photomatix. However, you do not need to crop the
source images before combining them.
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