A touch surface includes an array of rows of electrodes, an input point on a row for injecting an input voltage (VDRIVE), measuring an output voltage (VSENSE) at a second point in the row, p being the number of pitch spacings of the array separating the two points, the portion of the array between the first point and the second point being akin to an electric dipole of resistance (R(p)) and of capacitance (C), the output voltage (VSENSE) being equal to the product of the input voltage (VDRIVE) and a transfer function represented by a complex function (HSENSE). The measurement includes extracting the amplitude (G) and the phase (φ) from the transfer function; and calculating a hybrid function (S(G, φ)) of the amplitude and of the phase, the hybrid function minimizing a sum (Σ) defined by Σ i ∈ [ 0 , p ] ⁡ ( δ ⁢ ⁢ S δ ⁢ ⁢ R ⁢ ( G ⁡ ( R i ) , φ ⁡ ( R i ) ) ) .