Using conformal tactile textiles *, it is possible to get a dense, wearable 2D map of pressure on the foot (pictured above - yellow = unloaded, blue = loaded). What two-dimensional DSP tool might you use to analyse these data and detect whether a person pronates or supinates?
* https://www.nature.com/articles/s41928-021-00558-0

Question

Using  conformal tactile textiles *, it is possible to get a dense, wearable 2D map of pressure on the foot (pictured above - yellow = unloaded, blue = loaded). What two-dimensional DSP tool might you use to analyse these data and detect whether a person pronates or supinates? 
 * https://www.nature.com/articles/s41928-021-00558-0

Accepted Answer

Use a custom filter that highlights medial vs lateral pressure

Answer

examine the amplitude spectrum of the 2D Fourier Transform

Answer

Use a 2D wavelet to find which axis of the foot (orientation) has the highest pressure.

Answer

Use a 2D wavelet to find which spatial frequency has the highest pressure

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