Method
VipsImagemeasure
Declaration [src]
int
vips_measure (
VipsImage* in,
VipsImage** out,
int h,
int v,
...
)
Description [src]
Optional arguments
left: area of image containing charttop: area of image containing chartwidth: area of image containing chartheight: area of image containing chart
Analyse a grid of colour patches, producing an array of patch averages. The mask has a row for each measured patch and a column for each image band. The operations issues a warning if any patch has a deviation more than 20% of the mean. Only the central 50% of each patch is averaged.
If the chart does not fill the whole image, use the optional left, top,
width, height arguments to indicate the
position of the chart.
See also
This method is not directly available to language bindings.
Parameters
out-
Type:
VipsImageArray of measurements.
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. h-
Type:
intPatches across chart.
v-
Type:
intPatches down chart.
...-
Type:
NULL-terminated list of optional named arguments.