Vips.Image.mask_butterworth (original) (raw)
Constructor
VipsImagemask_butterworth
Declaration [src]
int
vips_mask_butterworth (
VipsImage** out,
int width,
int height,
double order,
double frequency_cutoff,
double amplitude_cutoff,
...
)
Description [src]
Make an butterworth high- or low-pass filter, that is, one with a variable, smooth transition positioned at frequency_cutoff, where frequency_cutoff is in range 0 - 1.
The shape of the curve is controlled byorder — higher values give a sharper transition. See Gonzalez and Wintz, Digital Image Processing, 1987.
Optional arguments
nodc:gboolean, don’t set the DC pixelreject:gboolean, invert the filter senseoptical:gboolean, coordinates in optical spaceuchar:gboolean, output a uchar image
This constructor is not directly available to language bindings.
Parameters
out
Type: VipsImage
Output 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: int
Image size.
height
Type: int
Image size.
order
Type: double
Filter order.
frequency_cutoff
Type: double
Frequency threshold.
amplitude_cutoff
Type: double
Amplitude threshold.
...
Type: ``
NULL-terminated list of optional named arguments.
Return value
Type: int
0 on success, -1 on error.