Calculate the 2D cross-correlation of two matrices using R-FFT.

This function calculates the 2D cross-correlation of two matrices a and b using R-FFT.

Usage

Xcorr2d_FFT_R(a, b)

Arguments

a

A matrix (2D array) of values.

b

A matrix (2D array) of values.

Value

A matrix representing the 2D cross-correlation of the input matrices.

See also

PIV_obtain_grid

Author

Ahmed Homoudi

Examples

a <- matrix(c(1, 2, 3, 4), ncol = 2)
b <- matrix(c(5, 6, 7, 8), ncol = 2)
cc <- Xcorr2d_FFT_R(a, b)
image(cc)