Notes on photo sphere/panoramic EXIF metadata

• Google's EXIF/XMP metadata tag specification for panoramic images
• Panorama images with sky are to have a negative value for the CroppedAreaTopPixels tag. (The panoramic viewer of Facebook ignores the value altogether, though, and assumes the horizon in the middle of the picture.)
• If a camera or software normally produces panoramic images with cylindrical projection, then doing a vertical capture actually produces a transverse cylindrical image. There is no standardized value for the EXIF ProjectionType field to cover this. (One option is to reproject them to equirectangular — which, again, is not very well supported.)
• Facebook's document on what tags to set
• The Facebook web interface insists that FullPanoHeightPixels be half the size of FullPanoWidthPixels. Else you get “no new photos were uploaded”.

Posted 2024-11-21 10:11 / Tags: Photo. / link

Doom, Heretic, Hexen, Thoughts. Speedrunning Heretic and Hexen: The presence of the Chaos Device and Wings Of Wrath artifacts open up significant shortcuts. The fact that these artifacts are also retained across maps means map designers need to be that much more careful if they want to forbid certain shortcuts. Posted 2012-10-27 19:10 / link