VipsImagehist_plot

int
vips_hist_plot (
  VipsImage* in,
  VipsImage** out,
  ...
)

Plot a 1 by any or any by 1 image file as a max by any or any by max image using these rules:

unsigned char max is always 256

other unsigned integer types output 0 - maxium value of in.

signed int types min moved to 0, max moved to max + min.

float types min moved to 0, max moved to any (square output)

This method is not directly available to language bindings.

`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.
`...`
	`NULL`-terminated list of optional named arguments.

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