Hi Lukas, the problem you are having is that images without metadata are loaded with Eev (Exposure) set to 0.0 - which is ok since the Eev of the panorama output defaults to 0.0 as well.
But when you use photos, these have Eev of 10.0 or similar and Hugin sets the output panorama Eev to the average of the input photos. This is ok until you add an artificial image without metadata - its Eev still gets set to 0.0, and it appears very dark. The solution is to manually set the Eev of artificial image to whatever value the Eev of the panorama is. -- Bruno On Sun, 12 Oct 2025, 22:45 wirz wrote: > Hi, > > I have a project where, apart from several normal photos (as jpg), there > is one jpg that has been generated with another program. It is not a > photo and does not contain an embedded thumbnail or any other exif data. > > In hugin I specify the fov and projection of the artificial image -- no > problems there. In the control points tab the image is displayed > correctly and I can manually set control points. In the openGL pano > preview the artificial image is displayed as entirely black, but in the > correct size etc (and all the other images are displayed correctly). In > the final result image (hugin_executor --stitching ...) it is also > treated as entirely black. > > Do we have any explicit requirements for what data a jpg must contain to > be treated correctly? I assume the issue has something to do with the > missing exif data, but I don't know which part is required. Depending > on what data hugin seems to be missing, it might be possible to treat > the image correctly with the existing data (given that it is displayed > correctly in the control points tab). > > > But apart from this minor issue, I found that for mountain panos where > no horizon is visible and where it is normally hard to keep the image > straight, it is a very good method to add an image with artificially > generated mountain outlines, align all photos relative to that, and > don't include the artificial image in the final pano. That way one gets > a result that is perfectly aligned with the invisible horizon. > 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/CAJV99ZgPuM7r1BDkzGG1RwS2hSBiKCEeh8HFdXK6MDgsT9Lsvw%40mail.gmail.com.
