AutoCorrelate2D
Advanced Analysis Library Only
AnalysisLibErrType AutoCorrelate2D (void *inputArray, ssize_t rowsInArray, ssize_t columnsInArray, void *outputArray);
Purpose
Finds the 2D autocorrelation of the input array.
AutoCorrelate2D computes the two-dimensional autocorrelation using the following equation:
for i = -(M–1), ..., -1, 0, 1, ..., (M–1) and j = -(N–1), ..., -1, 0, 1, ..., (N–1)
where M is the number of rows of matrix inputArray, and N is the number of columns of matrix inputArray. The indexed elements of inputArray that lie outside its range are equal to zero, as shown in the following relationship:
x(m,n) = 0 when m < 0 or m ≥ M or n < 0 or n ≥ N
 |
Note This function temporarily allocates memory for use as a work area. If AutoCorrelate2D cannot allocate memory, the function returns an error code. |
Parameters
| Input | ||
| Name | Type | Description |
| inputArray | void * | The input array for which to compute the autocorrelation operation. |
| rowsInArray | ssize_t | Number of rows in inputArray. |
| columnsInArray | ssize_t | Number of columns in inputArray. |
| Output | ||
| Name | Type | Description |
| outputArray | void | The autocorrelation of inputArray. The size of outputArray is (2m - 1)-by-(2n - 1). |
Return Value
| Name | Type | Description |
| status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 2012 and later