Method

VipsImagehist_match

Declaration [src]

int
vips_hist_match (
  VipsImage* in,
  VipsImage* ref,
  VipsImage** out,
  ...
)

Description [src]

Adjust in to match ref. If in and ref are normalised cumulative histograms, out will be a LUT that adjusts the PDF of the image from which in was made to match the PDF of ref‘s image.

See also: vips_maplut(), vips_hist_find(), vips_hist_norm(), vips_hist_cum().

This method is not directly available to language bindings.

Parameters

`ref`	`VipsImage`
	Reference histogram.
	The data is owned by the caller of the function.
`out`	`VipsImage`
	Output histogram.
	The argument will be set by the function.
	The instance takes ownership of the data, and is responsible for freeing it.
`...`
	`NULL`-terminated list of optional named arguments.

Return value

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