header(1)                                                            header(1)

       header - to read and display the header of an MRC image file.

       header [options] filename(s)

       Header will read and display the information in the header of an MRC
       image file - image size, data type, min, max, etc.  The program will
       accept the file name either from the command line or as an entry to the
       program after it is started.  If there is no file name or other argu-
       ments on the command line, the program asks for an input file name.

       If no options are given, the program will print the complete standard
       header output.  If any of the output options describe below are given,
       then the program prints only the numeric output for the given options,
       without any descriptive labels.  If multiple options are given, each
       option will produce one line of numeric output, with the output in the
       order that the options appear below (and that the output appears in the
       standard header output).  If multiple file names are entered, then all
       of the header entries will be printed for one file, then for the next,

       If the program finds that the file has an extended header from Seri-
       alEM, it will report what items are stored there and summarize the com-
       mands needed to extract them.  If the file has an Agard/FEI-style
       extended header, the program will report a pixel size and rotation
       angle from there.  In such a case, if the pixel spacing in the standard
       header is 2, 3, or 4, the program will assume that this represents
       bininng that was applied in IMOD, and it will report the original pixel
       size times this binning.  If the file came from the FEI acquisition
       software, the sign of the rotation angle is inverted to conform with
       the conventions used in IMOD.

       The options are processed by the PIP package (see man page for pip).
       Options can be abbreviated to unique letters; the currently valid
       abbreviations for short names are shown in parentheses.  They are:

       -input (-i) OR -InputFile      File name
              Input image file.  All nonoption arguments will be treated as
              input files.  (Successive entries accumulate)

       -size (-s) OR -Size
              Output image dimensions

       -mode (-mo) OR -Mode
              Output data mode

       -pixel (-p) OR -PixelSize
              Output pixel spacing in angstroms

       -origin (-o) OR -Origin
              Output origin values

       -minimum (-mi) OR -Minimum
              Output minimum value of data

       -maximum (-ma) OR -Maximum
              Output maximum value of data

       -mean (-me) OR -Mean
              Output mean value of data

       -brief (-b) OR -Brief
              Output brief header with dimensions, pixel size, mode, minimum,
              maximum, and mean value, and the first and last title.  This is
              the only way to get a brief header output; the IMOD_BRIEF_HEADER
              environment variable is ignored when running this program.

       -help (-h) OR -usage
              Print help output

              Read parameter entries from standard input.

       Originally written as part of the MRC image processing package.
       Converted to run on SGI by Paul Furcinitti and David Mastronarde, 1994.
       Converted to PIP input with simplified output options, 2/15/06.

       Email bug reports to mast at colorado dot edu.

BL3DEMC                              4.7.3                           header(1)