I've seen in the literature that the research area is a parameter of the LSPIV method. In PIVLab, we cannot choose this size so I guess that it is fixed. does it depend on the interrogation area size? How did you choose this size and where is it fixed in the code?
Hi, the search area depends on the interrogation area:
In DFT, the search area equals the interrogation area. So you need to start with large areas in order to capture large displacements. In subsequent passes, the search area is automatically offset and centered on the best displacement estimate for each window.
In DCC, the search area is twice as big as the interrogation area. It is not offset automatically.