# xcorr2

2-D cross-correlation.

## Syntax

* C = xcorr2(A)
* C = xcorr2(A, B)

## Input argument

* A - matrices
* B - matrices

## Output argument

* C - 2-D cross-correlation or autocorrelation matrix

## Description

xcorr2(A, B) calculates the cross-correlation between two matrices, A and B, in two dimensions, without any scaling applied.

## Example

```matlab
X = ones(2, 3);
H = [1 2; 3 4; 5 6];
C = xcorr2(H, X)
```

## See also

[filter2](filter2), [conv2](../data_analysis/conv2).

## History

| Version | Description     |
| ------- | --------------- |
| 1.3.0   | initial version |

## Author

Allan CORNET
