.TH EDVIPS 1 "30 June 1993"
.SH NAME
edvips \- edit header of a vips image file
.SH SYNOPSIS
.B edvips [OPTION...] vipsfile
.SH DESCRIPTION
.B edvips 
alters a VIPS image file's header. This is useful for setting the resolution, 
for example.

The options are:

  -x, --xsize=N       set Xsize to N
  -y, --ysize=N       set Ysize to N
  -b, --bands=N       set Bands to N
  -f, --format=F      set BandFmt to F (eg. IM_BANDFMT_UCHAR)
  -t, --type=T        set Type to T (eg. IM_TYPE_XYZ)
  -c, --coding=C      set Coding to C (eg. IM_CODING_LABQ)
  -X, --xres=R        set Xres to R pixels/mm
  -Y, --yres=R        set Yres to R pixels/mm
  -u, --xoffset=N     set Xoffset to N
  -v, --yoffset=N     set Yoffset to N
  -e, --setext        replace extension block with stdin

Be very careful when changing Xsize, Ysize, BandFmt or Bands. edvips does no
checking!

.SH EXAMPLES
To set the Xsize to 512 and Bands to 6:

  edvips --xsize=512 --bands=6 fred.v

or

  edvips -x 512 -b 6 fred.v

Extract the XML metadata from an image with
.B header(1),
edit it, and reattach with 
.B edvips(1).

  header -f getext fred.v | sed s/banana/pineapple/ | edvips -e fred.v

.SH RETURN VALUE
returns 0 on success and non-zero on error.
.SH SEE ALSO
header(1)
.SH COPYRIGHT
K. Martinez 1993