Imageiio/imaginfo (Ulead)
From Just Solve the File Format Problem
imageiio.pe3, imaginfo.pe3, imageiio.pe4, and imaginfo.pe4 are the names of files that are auto-generated by some graphics applications from Ulead Systems. A pair of PE3 files, or of PE4 files, generally appears together. They presumably contain a thumbnail cache, and other indexing information.
Applications reported to create such files include iPhoto Plus, PhotoImpact, and Photo Explorer.
Identification
Some or all imageiio.pe3 files begin with ASCII "IIO1$".
Some or all imageiio.pe4 files begin with ASCII "IIO2H".
The imaginfo formats have no obvious signature.
Sample files
- Ulead PhotoImpact 3.0 - CD image from archive.org (PE3 files)
- Ulead Systems iPhotoPlus 4 (ULEAD) (1996) - CD image from archive.org (PE4 files)
- https://telparia.com/fileFormatSamples/other/uleadImageiioThumbnailInfo/
- Or try searching the web for the relevant filenames.
