Method

VipsImageconvsep

Declaration [src]

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

Description [src]

Perform a separable convolution of in with mask. See vips_conv() for a detailed description.

The mask must be 1xn or nx1 elements.

The image is convolved twice: once with mask and then again with mask rotated by 90 degrees. This is much faster for certain types of mask (gaussian blur, for example) than doing a full 2D convolution.

::: tip “Optional arguments” * precision: VipsPrecision, calculation accuracy * layers: gint, number of layers for approximation * cluster: gint, cluster lines closer than this distance

::: seealso vips_conv(), vips_gaussmat().

Parameters

`out`	`VipsImage`
	Output image.
	The argument will be set by the function.
	The instance takes ownership of the data, and is responsible for freeing it.
`mask`	`VipsImage`
	Convolution mask.
	The data is owned by the caller of the function.
`...`	`none`
	`NULL`-terminated list of optional named arguments.

Return value

Returns:	`int`
	0 on success, -1 on error.