Boulder Laboratory for 3-Dimensional Electron Microscopy of Cells HEADER(1) HEADER(1) NAME header - to read and display the header of an MRC image file. SYNOPSIS header [options] filename(s) DESCRIPTION A simple program to 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 arguments 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, etc. The options are processed by the PIP package (see man page for pip). They are: -input OR -InputFile File name Input image file. All nonoption arguments will be treated as input files. (Successive entries accumulate) -size OR -Size Output image dimensions -mode OR -Mode Output data mode -pixel OR -PixelSize Output pixel spacing in angstroms -origin OR -Origin Output origin values -minimum OR -Minimum Output minimum value of data -maximum OR -Maximum Output maximum value of data -mean OR -Mean Output mean value of data -brief 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 OR -usage Print help output -StandardInput Read parameter entries from standard input. HISTORY 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.