Patent ID: 9684414
Date: 2017-06-20
CPC Classifications: G06F,H04M

Claim:
1. A method of enabling touch determination based on an output signal from a touch-sensitive apparatus, the touch-sensitive apparatus including a rectangular touch surface with first and second spatial dimensions, the rectangular touch surface configured to propagate signals across the rectangular touch surface along a plurality of detection lines, said method comprising: processing the output signal to generate a set of data samples indicative of transmitted signal energy for at least a subset of the plurality of detection lines; processing the set of data samples for transformation into Fourier coefficients arranged as data points on a grid defined by first and second frequency dimension parameters that represent frequencies in the first and second spatial dimensions, respectively; and processing the data points by inverse Fourier transformation to generate an interaction pattern in the first and second spatial dimensions of the rectangular touch surface; wherein the processing the data points includes