Hugin and EXR

[memecs]

Hi, I have some problem remapping EXR images. I did few experiments so far:

1. EXR out of range [0,1]: probably values are clamped to 0-1 or somehow tone-mapped, some of the input images looks ok, others areextremely dark or bright.   
2. EXR scaled to range [0,1]: looks ok in the preview, but the features detector (Hugin cpfind) can't find any control point.

A possibility would be to scale EXR to range [0,1] convert to 16-bit png do geometric/photometric optimization, apply results to EXR [0,1] and rescale to the orginal range. This looks like it's working but it's pretty tedious.

Any alternatives? Would be great to avoid scaling and/or conversion to PNG.

Thanks