Method
VipsImagelabelregions
Declaration [src]
int
vips_labelregions (
VipsImage* in,
VipsImage** mask,
...
)
Description [src]
Label regions of equal pixels in an image.
Repeatedly scans in for regions of 4-connected pixels
with the same pixel value. Every time a region is discovered, those
pixels are marked in mask with a unique serial number. Once all pixels
have been labelled, the operation returns, setting segments to the number
of discrete regions which were detected.
mask is always a 1-band VIPS_FORMAT_INT image of the same
dimensions as in.
This operation is useful for, for example, blob counting. You can use the
morphological operators to detect and isolate a series of objects, then use
vips_labelregions() to number them all.
Use vips_hist_find_indexed() to (for example) find blob coordinates.
Optional arguments
segments:gint, output, number of regions found
See also
This method is not directly available to language bindings.
Parameters
mask-
Type:
VipsImageWrite labelled regions here.
The data is owned by the caller of the method. ...-
Type:
NULL-terminated list of optional named arguments.