Function reconstruct_2d 

pub fn reconstruct_2d(
    signal_2d: ArrayViewMut2<'_, f32>,
    buffer: ArrayViewMut1<'_, f32>,
    wavelet: Wavelet<'_>,
)

Inverse wavelet transform, 2D, only twice, inplace.

+-----+-----+    +-----------+
|  A  |  H  |    |           |
+-----+-----+ => | 2D Signal |
|  V  |  D  |    |           |
+-----+-----+    +-----------+

Vertical firstly, then horizontal.

Hard requirements

• buffer_size >= signal_side_length + window_size - TWO