1. A non-transitory computer readable medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform a method comprising: computing a transfer matrix representing a relative influence that each respective electrode location for measuring electrical potentials on a patient's body has on an estimation of electrical potentials for locations on a surface of interest of the patient's body different than where the electrode locations are located, prior to the measuring of electrical potentials at the respective electrode locations; receiving electrical potential data corresponding to measurements measured via a plurality of electrodes at the respective electrode locations on the patient's body; computing the estimation of electrical potentials for the locations on the body surface of interest based at least in part on the received electrical potential data and the computed transfer matrix; and outputting, to a display device, an image of the body surface of interest that is indicative of the estimation of electrical potentials for the locations of the surface of interest.