ess.imaging.tools.resolution.mtf_less_than# ess.imaging.tools.resolution.mtf_less_than(mtf, limit)[source]# Computes the frequency where the modulation transfer function goes below limit. Parameters: mtf (DataArray) – A (potentially noisy) modulation transfer function curve having a coordinate named “frequency”. limit (Variable) – The modulation transfer function value at the returned frequency. Returns: Variable – The frequency where the modulation transfer function goes below “limit”.