• funconv, funcdeconv, matconv, matdeconv—Convolves or deconvolves an image with a function or a mask.

• center—Recenters an image in the Fourier transform domain.

• wave2d, iwave2d, wavescale—Returns the wavelet transform or inverse transform of an image.

• dct, idct—Returns the discrete cosine transform or inverse transform of an image.