Method PhaseCorrelate

Namespace

OpenCvSharp

Assembly

OpenCvSharp.dll

PhaseCorrelate(InputArray, InputArray, InputArray, out double)

The function is used to detect translational shifts that occur between two images.

The operation takes advantage of the Fourier shift theorem for detecting the translational shift in the frequency domain.It can be used for fast image registration as well as motion estimation. For more information please see http://en.wikipedia.org/wiki/Phase_correlation.

Calculates the cross-power spectrum of two supplied source arrays. The arrays are padded if needed with getOptimalDFTSize.

public static Point2d PhaseCorrelate(InputArray src1, InputArray src2, InputArray window, out double response)

Parameters

src1 InputArray

Source floating point array (CV_32FC1 or CV_64FC1)

src2 InputArray

Source floating point array (CV_32FC1 or CV_64FC1)

window InputArray

Floating point array with windowing coefficients to reduce edge effects (optional).

response double

Signal power within the 5x5 centroid around the peak, between 0 and 1 (optional).

Returns

Point2d

detected phase shift(sub-pixel) between the two arrays.