Method

VipsImagecompass

Declaration [src] 

int
vips_compass (
  VipsImage* in,
  VipsImage** out,
  VipsImage* mask,
  ...
)

Description [src]

This convolves in with mask times times, rotating mask by angle each time. By default, it comvolves twice, rotating by 90 degrees, taking the maximum result.

Optional arguments

  • times: gint, how many times to rotate and convolve
  • angle: VipsAngle45, rotate mask by this much between colvolutions
  • combine: VipsCombine, combine results like this
  • precision: VipsPrecision, precision for blur, default float
  • layers: gint, number of layers for approximation
  • cluster: gint, cluster lines closer than this distance

See also

vips_conv().

This method 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 method takes ownership of the returned data, and is responsible for freeing it.
mask

Type: VipsImage

Convolve with this mask.

The data is owned by the caller of the method.
...

Type: 

NULL-terminated list of optional named arguments.

Return value

Type: int

0 on success, -1 on error.