Ejemplo n.º 1
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    def test_fwt1Db(self):
        """test that fwt1D works on example vectors"""

        D = 4
        N = 8
        X = Numeric.zeros(N, Numeric.Float)

        for i in range(len(X)):
            X[i] = i + 1

        Y = fwt(X, D)

        Y = Y - Numeric.array(
            [
                12.72792206135786,
                -4.38134139536131,
                0.36602540378444,
                -3.83012701892219,
                0.0,
                0.0,
                0.0,
                -2.82842712474619,
            ]
        )
        assert Numeric.allclose(Y, 0)
Ejemplo n.º 2
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    def test_columnwise_fwt_b(self):
        """test thath columnwise fwt works"""

        X = Numeric.ones(8 * 4, Numeric.Float)
        X = Numeric.reshape(X, (8, 4))

        for i in range(8):
            X[i, 0] = i + 1
            X[i, 1] = 1
            X[i, 2] = i + 1
            X[i, 3] = 2

        # Numeric.transpose(X))
        Y = fwt(X)

        Y_ref = Numeric.array(
            [
                [12.72792206135786, sqrt(8), 12.72792206135786, sqrt(32)],
                [-4.38134139536131, 0.0, -4.38134139536131, 0.0],
                [0.36602540378444, 0.0, 0.36602540378444, 0.0],
                [-3.83012701892219, 0.0, -3.83012701892219, 0.0],
                [0.0, 0.0, 0.0, 0.0],
                [0.0, 0.0, 0.0, 0.0],
                [0.0, 0.0, 0.0, 0.0],
                [-2.82842712474619, 0.0, -2.82842712474619, 0.0],
            ]
        )

        Y -= Y_ref
        assert Numeric.allclose(Y, 0)
Ejemplo n.º 3
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    def test_ifwt1D_basic(self):
        """test that ifwt1D works basically"""

        X = Numeric.ones(8, Numeric.Float)
        Y = fwt(X)
        X1 = ifwt(Y)
        assert Numeric.allclose(X - X1, 0)
Ejemplo n.º 4
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    def test_fwt1Dc8(self):
        """test that fwt1D works on a 'random' vector, D=8"""

        # Matlab random vector
        X = Numeric.array(
            [
                0.81797434083925,
                0.66022755644160,
                0.34197061827022,
                0.28972589585624,
                0.34119356941488,
                0.53407901762660,
                0.72711321692968,
                0.30929015979096,
            ]
        )

        # Result from fwt(X, 8) in Matlab
        Y_ref = Numeric.array(
            [
                1.42184125586417,
                -0.27774330567583,
                0.26539391030148,
                0.02521137886213,
                0.13638973750197,
                0.31441497909028,
                -0.20260945655043,
                0.05934606703242,
            ]
        )

        Y = fwt(X, 8)
        assert Numeric.allclose(Y - Y_ref, 0)
Ejemplo n.º 5
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    def test_fwt1Dc6(self):
        """test that fwt1D works on a 'random' vector, D=6"""

        # Matlab random vector
        X = Numeric.array(
            [
                0.81797434083925,
                0.66022755644160,
                0.34197061827022,
                0.28972589585624,
                0.34119356941488,
                0.53407901762660,
                0.72711321692968,
                0.30929015979096,
            ]
        )

        # Result from fwt(X, 6) in Matlab
        Y_ref = Numeric.array(
            [
                1.42184125586417,
                -0.27979815817808,
                0.21836186329686,
                0.17939935114879,
                0.00345049516774,
                0.22893484261518,
                0.25762577687352,
                -0.18246978758220,
            ]
        )

        Y = fwt(X, 6)
        assert Numeric.allclose(Y - Y_ref, 0)
Ejemplo n.º 6
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    def test_fwt1Dc4(self):
        """test that fwt1D works on a 'random' vector, D=4"""

        # Matlab random vector
        X = Numeric.array(
            [
                0.81797434083925,
                0.66022755644160,
                0.34197061827022,
                0.28972589585624,
                0.34119356941488,
                0.53407901762660,
                0.72711321692968,
                0.30929015979096,
            ]
        )

        # Result from fwt(X, 4) in Matlab
        Y_ref = Numeric.array(
            [
                1.42184125586417,
                -0.15394808354817,
                0.05192707167183,
                0.37115044369886,
                -0.10770249228974,
                -0.08172091206233,
                0.29500215027890,
                0.20196258114742,
            ]
        )

        Y = fwt(X, 4)
        assert Numeric.allclose(Y - Y_ref, 0)
Ejemplo n.º 7
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    def test_fwt1Dc(self):
        """test that fwt1D works as a 2D vector"""

        X = Numeric.ones(8, Numeric.Float)
        X = Numeric.reshape(X, (8, 1))

        Y = fwt(X)

        Y[0][0] -= sqrt(len(Y))
        assert Numeric.allclose(Y, 0)
Ejemplo n.º 8
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    def test_ifwt1D_inverse_b(self):
        """test that fwt1D works as an inverse to ifwt"""

        for j in range(1, 9):
            N = 2 ** j
            for P in range(number_of_filters):
                D = 2 * (P + 1)

                X = Numeric.ones(N, Numeric.Float)
                Y = ifwt(X, D)

                X1 = fwt(Y, D)
                assert Numeric.allclose(X - X1, 0)
Ejemplo n.º 9
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    def test_fwt1Da(self):
        """test that fwt1D works on constant vector: ones"""

        for j in range(1, 9):
            N = 2 ** j
            for P in range(number_of_filters):
                D = 2 * (P + 1)

                X = Numeric.ones(N, Numeric.Float)
                Y = fwt(X, D)

                Y[0] -= sqrt(len(Y))
                assert Numeric.allclose(Y, 0)
Ejemplo n.º 10
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    def test_columnwise_fwt_a(self):
        """test thath columnwise fwt works"""

        X = Numeric.ones(8 * 4, Numeric.Float)
        X = Numeric.reshape(X, (8, 4))

        Y = fwt(X)

        rows, cols = Y.shape
        for i in range(cols):
            Y[0, i] -= sqrt(rows)

        assert Numeric.allclose(Y, 0)
Ejemplo n.º 11
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    def test_scale_energy(self):
        D = 4
        N = 8
        d = 3

        X = Numeric.zeros(N, Numeric.Float)

        for i in range(len(X)):
            X[i] = i + 1

        Wx = fwt(X, D, d)

        Evec = scale_energy(Wx, d + 1)  # All details + avg

        Evec_ref = Numeric.array([0.03921568627451, 0.07256788028085, 0.09409878638582, 0.79411764705882])

        assert Numeric.allclose(Evec - Evec_ref, 0)
Ejemplo n.º 12
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    def test_callfwt(self):
        """test that fwt can be called"""

        X = Numeric.array([[1, 2, 1], [3, 4, 3], [5, 6, 5], [7, 8, 7], [9.0, 10, 9]])
        Y = fwt(X)