In a wavelet transform section, wavelet-transform coefficient signals are obtained by two-dimensional wavelet transformation, employing a low-pass filter which has a characteristic that its response at a frequency greater than a spatial frequency corresponding to grid pitch is approximately zero. The boost converter includes the first and second switch elements, and the first and second output capacitors. A harmonic expansion of the permittivity \u03b5 or inverse permittivity 1\u03b5 is performed along the direction of periodicity for each of the layers including the layer which includes the first, second and third materials. An integrated surgical retainer for use in the full thickness resectioning device is described.