Name

ccc - calculate cross-correlation coefficient between two images

Usage

output = ccc(image1, image2 ,[mask])

Input

image1

first input image

image2

second input image

mask

an optional mask image. Only pixels in image1 and image2 for which values of corresponding pixels in mask > 0.5 will be included in calculation.

Output

output

the cross-correlation coefficient between images

Method

• Cross-correlation coefficient is calculated directly in real space as:

• `\c\c\c=(1/(nx)(sum_(k=0)^(nx-1)(f(k)-Ave_f)(g(k)-Ave_g)))/(sigma_f sigma_g`

Reference

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

Author / Maintainer

Pawel A. Penczek

Keywords

category 1

STATISTICS

category 2

SPATIAL

Files

statistics.py

Maturity

stable

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

Bugs

None. It is perfect.