.TH IM_SIMCONTR 3 "10 May 1991"
.SH NAME
im_simcontr \- shows the effect of simultaneous contrast
.SH SYNOPSIS
.B #include <vips/vips.h>

.B int im_simcontr( image, xsize, ysize )
.br
.B IMAGE *image;
.br
.B int xsize, ysize;
.SH DESCRIPTION
.B im_simcontr()
creates an unsigned char one band grey scale image of sizes xsize by ysize.
The created pattern consists of two neighbouring squares one dark (left
square) and one light (right square).  The left 
one contains a smaller light square and the right
one contains a darker square.
.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE\ ALSO
im_grey(3)
.SH COPYRIGHT
.br
N. Dessipris
.SH AUTHOR
N. Dessipris \- 10/05/1991