Matched filtering with lensed and unlensed waveforms. Top panel: example microlensed gravitational-wave strain (black line) and corresponding detector data with noise (blue data). The unlensed strain is also shown for comparison (orange line). Bottom panel: matched filter S/N of the detector data using the microlensed waveform (black line) and the unlensed waveform (orange line). The microlensed gravitational-wave strain matches the data better and thus returns a higher matched S/N. Here, a high S/N example is considered for illustration, and both signals are normalized so that their optimal S/Ns are the same.