Revision 1 as of 2006-08-04 19:38:34

Clear message

Name

acfnp - calculate the normalized autocorrelation function of an image using padding with zeroes and multiplication in Fourier space.

Usage

output = acfnp(image)

Input

par1
image - input image (real)

Output

out1
output - normalized autocorrelation function of the input image. Real. The origin of the autocorrelation function (term ccf(0,0,0)) is located at (int[n/2], int[n/2], int[n/2]) in 3D, (int[n/2], int[n/2]) in 2D, and at int[n/2] in 1D.

Method

Reference

Pratt, W. K., 1992. Digital image processing. Wiley, New York.

Author / Maintainer

Pawel A. Penczek

Keywords

category 1
FUNDAMENTALS
category 2
FOURIER

Files

fundamentals.cpp

Maturity

stable
works for most people, has been tested; test cases/examples available.

Bugs

None. It is perfect.