openpiv.pyprocess.find_second_peak

openpiv.pyprocess.find_second_peak(corr, i=None, j=None, width=2)

Find the value of the second largest peak.

The second largest peak is the height of the peak in the region outside a 3x3 submatrxi around the first correlation peak.

Parameters:

• corr (np.ndarray) – the correlation map.
• i,j (ints) – row and column location of the first peak.
• width (int) – the half size of the region around the first correlation peak to ignore for finding the second peak.

Returns:

• i (int) – the row index of the second correlation peak.
• j (int) – the column index of the second correlation peak.
• corr_max2 (int) – the value of the second correlation peak.