Method
VipsImagefastcor
Declaration [src]
int
vips_fastcor (
VipsImage* in,
VipsImage* ref,
VipsImage** out,
...
)
Description [src]
Calculate a fast correlation surface.
ref is placed at every position in in and the sum of squares of
differences calculated.
The output image is the same size as the input. Extra input edge pixels are made by copying the existing edges outwards.
If the number of bands differs, one of the images must have one band. In this case, an n-band image is formed from the one-band image by joining n copies of the one-band image together, and then the two n-band images are operated upon.
The output type is uint if both inputs are integer, float if both are float or complex, and double if either is double or double complex. In other words, the output type is just large enough to hold the whole range of possible values.
See also: vips_spcor().
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