im_maxpos_vec(3)

NAME

im_maxpos_vec, im_minpos_vec - Find highest or lowest pixel values

SYNOPSIS

#include <vips/vips.h>
int im_maxpos_vec( IMAGE *im, int *xpos, int *ypos, double *maxima, int n );
int im_minpos_vec( IMAGE *im, int *xpos, int *ypos, double *minima, int n );

DESCRIPTION

im_maxpos_vec(3) fills the arrays xpos and ypos with the x and y coordinates of the n pixels in the image im which have the highest values. It writes those values (at double-precsion) into the corresponding elements in the array maxima.

If there is a draw for the nth pixel, then which of the drawing pixels is used is not defined.

im_minpos_vec(3) performs the same operation, looking for the lowest valued pixels.

RETURN VALUE

The functions returns 0 on success and -1 on error.

SEE ALSO

im_maxpos(3), im_minpos(3)

COPYRIGHT

Copyright 2006, The Nottingham Trent University. Copyright 2006, Tom Vajzovic.

AUTHOR

Tom Vajzovic

01 September 2006 IM_MAXPOS_VEC(3)