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im_zone
Langue: en
Version: 166005 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
im_zone, im_fzone - creates a zone plateSYNOPSIS
#include <vips/vips.h>int im_zone(image, size)
IMAGE *image;
int size;
int im_fzone(image, size)
IMAGE *image;
int size;
DESCRIPTION
im_fzone() creates a float one band image of a zone plate of size size by size. Pels are in the range [-1,+1]. The zone plate has spatial frequencies increasing from 0 the center (at size/2, size/2) up to infinity at the edges. size must be positive and even.
im_zone() behaves exactly as im_fzone(), but writes a FMTUCHAR image scaled to the range 0-255.
RETURN VALUE
The function returns 0 on success and -1 on error.SEE ALSO
im_grey(3), im_fgrey(3).COPYRIGHT
N. DessiprisAUTHOR
N. Dessipris - 10/05/1991Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre