1. In a resistive column-row matrix configured to provide output in response to touch or other physically-applied inputs, a method of discerning one or more input locations on the resistive column-row matrix, comprising: receiving one or more physically-applied inputs at the resistive column-row matrix; during application of the one or more physically-applied inputs, performing a hierarchical scan of the resistive column-row matrix to determine, for each of a plurality of multi-cell groups comprising the resistive column-row matrix, whether the one or more physically-applied inputs are causing activation of a column-row cell within the multi-cell group; performing a supplemental scan within a multi-cell group if it is determined that a physically-applied input is causing activation of a column-row cell within the multi-cell group; and generating, based on the hierarchical scan and the supplemental scan, an output indicative of the one or more input locations on the resistive column-row matrix of the one or more physically-applied inputs.