Method
VipsImagehist_local
Declaration [src]
int
vips_hist_local (
VipsImage* in,
VipsImage** out,
int width,
int height,
...
)
Description [src]
Optional arguments:
max_slope: maximum brightening
Performs local histogram equalisation on in using a
window of size width by height centered on the input pixel.
The output image is the same size as the input image. The edge pixels are created by mirroring the input image outwards.
If max_slope is greater than 0, it sets the maximum value for the slope of
the cumulative histogram, that is, the maximum brightening that is
performed. A value of 3 is often used. Local histogram equalization with
contrast limiting is usually called CLAHE.
See also: vips_hist_equal().
This method is not directly available to language bindings.
Parameters
out-
Type:
VipsImageOutput 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. width-
Type:
intWidth of region.
height-
Type:
intHeight of region.
...-
Type:
NULL-terminated list of optional named arguments.