im_sines3
Creates a spatial sine wave form
Usage
#include <vips/vips.h>
int im_sines(image, xsize, ysize, horfreq, verfreq)
IMAGE *image;
int xsize, ysize;
double horfreq, verfreq;
Overview
im_sines() creates a float one band image of the a sine waveform in two dimensions. The sizes of the created image are xsize by ysize. The number of horizontal and vertical spatial frequencies are determined by the variables horfreq and verfreq respectively. The function is the base for creating displayable sine waves and square waves in two dimensions.
Return value
The function returns 0 on success and -1 on error.
Releases
Unchanged in 4 releases since Debian 3.1 (Sarge).