... in fact HDR and LDR color correction is quite the same ...*
Here is how I understand it:
- Differently exposed images** are converted into Autopano internal extended dynamic format
. This applies both to LDR mode and to HDR mode.
- Using LDR mode one must use the Levels tool*** to compress this extended range so that it matches the smaller range that JPEG, screens and printers can accept.
- HDR mode is (or was ?) designed to record this extended dynamic range without compression into .exr or .kro high dynamic range format files.
That the internal
Autopano extended dynamic format
exists and that the Levels tool plays a decisive part when LDR mode (and HDR mode ?) are used is not something obvious. The worst thing about it is that HDR is often confused with tone mapping: when using Autopano on the contrary HDR is to be used when no tone mapping is desired...
Following screen captures result from an attempt to find out how it works but your comments and corrections would be
* except if you have really dark image ( in this case, we don't have enough information in the image and color correction rely itseft on exif data instead.)
** NONE = No color correction is preferable when all images were shot using the same exposure setting (and for RAW preprocessed images when same processing parameters were used.)
*** or leave this task to automatic levels. Automatic levels is active when Auto color correction
is selected in Edit - Settings - Detection - Automate