... The wavelet map is a graphical representation of the function (sometimes called the wavelet coefficients) of two variables and for a given wavelet. Large values of the function (the so-called wavelet coefficients) reflect the combined effects of a large fluctuation of the signal f at this time and of a good matching of shape between the signal and the wavelet. ... For example when we use the antisymmetric wavelet (Fig. ... Figure 8: g1-wavelet map of the cosine picks out gradients of the signal. ...