Namespace Egami.Formats.Extended.Fits

FitsCard: One header card: a keyword, its value and its comment. The value is a string, a bool, a long, a double, or null for a card without one (COMMENT, HISTORY, a blank keyword). A value the reader does not type, such as a complex number, is kept as its text.

FitsDetails: Details only FITS has, kept in FormatDetails: the HDU's header and how its values became the picture. The writer writes the header's own keywords (all but the structural ones) back.

FitsFile: A whole FITS file, for the numbers rather than a picture: every HDU's header cards, and an image's physical values, BZERO + BSCALE × stored, unstretched, with missing pixels (BLANK, NaN, damaged tiles, data past the file's end) as NaN. Tile-compressed images decode as plain ones. World coordinate (WCS) keywords are in the header; Egami does no sky coordinate math.

FitsFormat: FITS (Flexible Image Transport System, standard 4.0), astronomy's image format: headers of 80-character keyword cards in 2880-byte blocks, then big-endian 8, 16, 32 or 64-bit integer or 32 or 64-bit float data. Load gives a viewable picture of the first image, stretched into 0 to 1 (Stretch); LoadAll gives every image of every HDU and every plane of a cube. FitsFile gives the header cards and the physical values themselves. Registered with WithFits(EgamiContext).

FitsHdu: One HDU of a FITS file: its header, and for an image, its BITPIX and axes. A tile-compressed image reports the image's own BITPIX and axes (ZBITPIX, ZNAXISn), not the table's.

FitsHeader: The cards of one FITS header, in order, with typed lookups by keyword. Long string values continued over CONTINUE cards are joined into one card.