On Sat, 7 Dec 2024 at 06:47, David W. Jones wrote: > > On December 6, 2024 12:43:19 AM HST, Bruno Postle wrote: > > Hugin reads the EXIF metadata and adjusts the exposure of each photo in the > > project so they all look like they were taken with the same exposure. > > Sometimes this works very well, but it can result in ugly blown out areas > > depending on your camera. > > > If you don't want this behaviour, the simplest thing you can do is to set > > the Ev of all your input photos *and* the Ev of your panorama output to the > > same number. I also find that increasing the enblend levels helps cover the > > mismatch. > > How does this affect making exposure stacks? In that case, I'd expect Hugin > to use the EXIF EV instead of adjusting the exposures of individual images > "out of the box".
Camera EXIV EV values can be unreliable, my Nikon shutter speeds are not to be trusted, even on consecutive shots. The difference between relying on EXIV data and optimisation is usually very noticeable, even with a panorama shot on fixed exposure. Also the vignetting/exposure/response-curve optimisation works best when used together. HDR exposure stacks rely completely on a good response-curve calculation. Hugin by default tries to create a photometrically accurate panorama. Even if the camera is on auto-exposure the rendered result will be as if it was taken on with a single exposure - most of the time this is what you want, I leave my phone camera on auto-exposure, and stitch with Hugin on default settings. If you still want to avoid this exposure correction, another way to do it is to stitch using one of the 'Exposure fused' panorama output options. This is designed for stacked panoramas, but it also works on normal panoramas with partial overlap - exposure fusion is not in any way photometrically accurate so exposure correcting photos would be counterproductive. -- Bruno -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/hugin-ptx/CAJV99ZhZQ9ZwK%2BiFMUFrZm60HqJ14h0o0rMkRT0Qu2eoeStcHw%40mail.gmail.com.
