diff options
Diffstat (limited to 'lib/imhdr.h')
| -rw-r--r-- | lib/imhdr.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/imhdr.h b/lib/imhdr.h new file mode 100644 index 00000000..dcd04d59 --- /dev/null +++ b/lib/imhdr.h @@ -0,0 +1,79 @@ +# IMHDR.H -- Image Header Definitions. The structure definitions in this file +# assume two or less chars per struct unit (e.g., a one or two byte char). + +define IM_MAXDIM 7 # maximum dimension of image +define SZ_IMMAGIC 5 # used to verify structure +define SZ_IMPIXFILE 255 # name of pixel storage file +define SZ_IMHDRFILE 255 # name of header storage file +define SZ_IMTITLE 383 # image title string +define SZ_IMHIST 1023 # image history record +define SZ_BUNIT 9 # brightness units string +define SZ_CTYPE 9 # coord axes units string + +define IMH_MAGICSTR "imhdr" # file identification string +define PIX_MAGICSTR "impix" # file identification string + +# The IMIO image header structure. + +# Parameters. +define LEN_IMDES 200 # length of image descriptor +define LEN_IMHDR 1024 # length of std header +define IMD LEN_IMDES # offset to std header fields +define IMU (LEN_IMDES+LEN_IMHDR) # offset to user fields +define IM_USERAREA (P2C($1+IMU)) # user area (database) + +# Disk resident header. +define IM_MAGIC Memi[$1+IMD] # contains the string "imhdr" +define IM_HDRLEN Memi[$1+IMD+3] # length of image header +define IM_HDRVER Memi[$1+IMD+4] # image format version +define IM_PIXTYPE Memi[$1+IMD+5] # datatype of the pixels +define IM_SWAPPED Memi[$1+IMD+6] # pixels are byte swapped +define IM_NDIM Memi[$1+IMD+7] # number of dimensions +define IM_LEN Meml[$1+IMD+$2+8-1] # length of the dimensions +define IM_PHYSLEN Meml[$1+IMD+$2+15-1] # physical length (as stored) +define IM_SSMTYPE Meml[$1+IMD+22] # type of subscript mapping +define IM_LUTOFF Meml[$1+IMD+23] # offset to subscript map luts +define IM_PIXOFF Meml[$1+IMD+24] # offset of the pixels +define IM_HGMOFF Meml[$1+IMD+25] # offset of hgm pixels +define IM_BLIST Meml[$1+IMD+26] # offset of bad pixel list +define IM_SZBLIST Meml[$1+IMD+27] # size of bad pixel list +define IM_NBPIX Meml[$1+IMD+28] # number of bad pixels +define IM_CTIME Meml[$1+IMD+29] # time of image creation +define IM_MTIME Meml[$1+IMD+30] # time of last modify +define IM_LIMTIME Meml[$1+IMD+31] # time min,max computed +define IM_MAX Memr[P2R($1+IMD+32)] # max pixel value +define IM_MIN Memr[P2R($1+IMD+33)] # min pixel value +define IM_PIXFILE Memc[P2C($1+IMD+37)] # name of pixel storage file +define IM_HDRFILE Memc[P2C($1+IMD+165)] # name of header storage file +define IM_TITLE Memc[P2C($1+IMD+293)] # image name string +define IM_HISTORY Memc[P2C($1+IMD+485)] # history comment string + +# The Histogram structure (field IM_HGM) +define LEN_HGMSTRUCT 20 +define HGM_TIME Meml[$1] # time when hgm was computed +define HGM_LEN Meml[$1+1] # number of bins in hgm +define HGM_NPIX Meml[$1+2] # npix used to compute hgm +define HGM_MIN Memr[P2R($1+3)] # min hgm value +define HGM_MAX Memr[P2R($1+4)] # max hgm value +define HGM_INTEGRAL Memr[P2R($1+5)] # integral of hgm +define HGM_MEAN Memr[P2R($1+6)] # mean value +define HGM_VARIANCE Memr[P2R($1+7)] # variance about mean +define HGM_SKEWNESS Memr[P2R($1+8)] # skewness of hgm +define HGM_MODE Memr[P2R($1+9)] # modal value of hgm +define HGM_LCUT Memr[P2R($1+10)] # low cutoff value +define HGM_HCUT Memr[P2R($1+11)] # high cutoff value +# next available field: ($1+12) + + +# The Coordinate Transformation Structure (IM_CTRAN) +define LEN_CTSTRUCT 50 +define CT_VALID Memi[$1] # (y/n) is structure valid? +define CT_BSCALE Memr[P2R($1+1)] # pixval scale factor +define CT_BZERO Memr[P2R($1+2)] # pixval offset +define CT_CRVAL Memr[P2R($1+$2+3-1)] # value at pixel +define CT_CRPIX Memr[P2R($1+$2+10-1)] # index of pixel +define CT_CDELT Memr[P2R($1+$2+17-1)] # increment along axis +define CT_CROTA Memr[P2R($1+$2+24-1)] # rotation angle +define CT_BUNIT Memc[P2C($1+31)] # pixval ("brightness") units +define CT_CTYPE Memc[P2C($1+36)] # coord units string +# next available field: ($1+41) |