Constructor
VipsImagemask_butterworth_ring
Declaration [src]
int
vips_mask_butterworth_ring (
VipsImage** out,
int width,
int height,
double order,
double frequency_cutoff,
double amplitude_cutoff,
double ringwidth,
...
)
Description [src]
Optional arguments:
nodc: don’t set the DC pixelreject: invert the filter senseoptical: coordinates in optical spaceuchar: output a uchar image
Make a butterworth ring-pass or ring-reject filter, that is, one with a
variable,
smooth transition
positioned at frequency_cutoff of width width, where frequency_cutoff is
in the range 0 - 1. The shape of the curve is controlled by
order —- higher values give a sharper transition. See Gonzalez and Wintz,
Digital Image Processing, 1987.
See also: vips_mask_ideal().
This constructor is not directly available to language bindings.
Parameters
out-
Type:
VipsImageOutput image.
The argument will be set by the function. The caller of the function takes ownership of the returned data, and is responsible for freeing it. width-
Type:
intImage size.
height-
Type:
intImage size.
order-
Type:
doubleFilter order.
frequency_cutoff-
Type:
doubleFrequency threshold.
amplitude_cutoff-
Type:
doubleAmplitude threshold.
ringwidth-
Type:
doubleRingwidth.
...-
Type:
NULL-terminated list of optional named arguments.