Electron microscopy formats

The openreadout-em crate has four readers, registered as separate formats:

format id	reader	file types	notes
mrc	MrcReader	.mrc, .mrcs, .map, .ccp4, .rec, .st, .ali, .preali	open MRC2014 standard: mrc.md
dm	DmReader	.dm3, .dm4	Gatan Digital Micrograph: dm.md
ser	SerReader	.ser, .emi	FEI TIA / ES Vision series: ser.md
emd	EmdReader	.emd	Velox EMD (HDF5): emd.md

All four report family = "electron-microscopy" and fill the same normalized model as the light-microscopy readers: images with size_x/size_y/size_z/size_t, physical sizes in µm (EM files store Å, nm or m; conversions are documented per format and the original values are kept in extra), acquired_at in UTC, instrument, and microscope settings (extra.voltage_kv, extra.magnification, …). export to OME-TIFF and OME-Zarr works through the generic exporters.

Crate-level items: util.rs holds crate-private helpers (bounded reads, endian decoding, half-float widening, OLE/Unix timestamp conversion); it exports nothing public.

Vocabulary (public identifiers at the crate root)

identifier	meaning
MrcReader, DmReader, SerReader, EmdReader	re-exports of the four readers