응용 분야

웨이블릿의 최적 기저 계산 

In[1]:=

X SeedRandom[2]; dwd = DiscreteWaveletPacketTransform[RandomReal[10, 16]];

In[2]:=

X bestBasisMethod = {"ShannonEntropy", "Norm", "LogEnergy", {"Threshold", 2}};

In[3]:=

X basisPlot = Table[{Show[WaveletBestBasis[dwd, c]["BestBasisBlockView"], ImageSize -> 280], Magnify[Show[WaveletBestBasis[dwd, c][{"TreeView", Center}], AspectRatio -> 1, ImageSize -> 500], 0.55]}, {c, bestBasisMethod}];

In[4]:=

X ShowBestBasis[name_, info_] := Framed[Column[{Style[name, 14, Bold, FontFamily -> "Helvetica"], Grid[{info}, Spacings -> {0, 0}]}, Alignment -> Center], RoundingRadius -> 50, FrameStyle -> None, Background -> GrayLevel@0.90]

In[5]:=

X Column[MapThread[ShowBestBasis, {bestBasisMethod, basisPlot}]]

Out[5]=