NAME
im_grey, im_fgrey, im_make_xy - creates a grey scale
SYNOPSIS
#include <vips/vips.h>
int im_grey( image, xsize, ysize )
IMAGE *image;
int xsize, ysize;
int im_fgrey( image, xsize, ysize )
IMAGE *image;
int xsize, ysize;
int im_make_xy( image, xsize, ysize )
IMAGE *image;
int xsize, ysize;
DESCRIPTION
im_grey(3) creates a one-band FMTUCHAR grey scale image of sizes xsize
by ysize. The intensity varies from 0 (left) to 255 (right).
im_fgrey(3) works as im_grey(3), except that the output image is
FMTFLOAT, allowing pixel values from 0 (left) to 1.0 (right).
im_make_xy(3) makes a two-band FMTUINT image where each pixel in band 0
has a value equal to the x coordinate, and each pixel in band 1 has a
value equal to the y coordinate.
RETURN VALUE
The function returns 0 on success and -1 on error.
SEE ALSO
im_black(3)
COPYRIGHT
Birkbeck College and the National Gallery, 1995
10 May 1991 IM_GREY(3)