« Db3 | Db5 »

Wavelet Daubechies 4 (db4)

Properties

Family: Daubechies (db)

Properties: asymmetric, orthogonal, biorthogonal.

Wavelet and scaling functions

  • Daubechies 4 Scaling function

    Scaling function φ

  • Daubechies 4 Wavelet function

    Wavelet function ψ

Coefficients

Show valuesHide values
Decomposition low-pass filter (copy↓)
Daubechies 4 Decomposition low-pass filter
  1. h0 = -0.0105974018
  2. h1 =  0.0328830117
  3. h2 =  0.0308413818
  4. h3 = -0.1870348117
  5. h4 = -0.0279837694
  6. h5 =  0.6308807679
  7. h6 =  0.7148465706
  8. h7 =  0.2303778133
Reconstruction low-pass filter (copy↓)
Daubechies 4 Reconstruction low-pass filter
  1. h'0 =  0.2303778133
  2. h'1 =  0.7148465706
  3. h'2 =  0.6308807679
  4. h'3 = -0.0279837694
  5. h'4 = -0.1870348117
  6. h'5 =  0.0308413818
  7. h'6 =  0.0328830117
  8. h'7 = -0.0105974018
Decomposition high-pass filter (copy↓)
Daubechies 4 Decomposition high-pass filter
  1. g0 = -0.2303778133
  2. g1 =  0.7148465706
  3. g2 = -0.6308807679
  4. g3 = -0.0279837694
  5. g4 =  0.1870348117
  6. g5 =  0.0308413818
  7. g6 = -0.0328830117
  8. g7 = -0.0105974018
Reconstruction high-pass filter (copy↓)
Daubechies 4 Reconstruction high-pass filter
  1. g'0 = -0.0105974018
  2. g'1 = -0.0328830117
  3. g'2 =  0.0308413818
  4. g'3 =  0.1870348117
  5. g'4 = -0.0279837694
  6. g'5 = -0.6308807679
  7. g'6 =  0.7148465706
  8. g'7 = -0.2303778133