Package ru.ifmo.diplom.kirilchuk.jawelet.core.dwt

Examples of ru.ifmo.diplom.kirilchuk.jawelet.core.dwt.DecompositionResult

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    public DecompositionResult decompose(double[] data, int level) {//TODO check can we have approximation of size 3?
        Assert.argNotNull(data);
        Assert.argCondition(level >= 1, "Level argument must be >= 1.");
        Assert.argCondition(data.length >= 2, "Data length must be >= 2.");

        DecompositionResult result = new DecompositionResult();
        double[] approximation;
        double[] details;
        for (int i = 1; i <= level; ++i) {
            approximation = decomposeLow(data);
            details = decomposeHigh(data);
            result.setApproximation(approximation);
            result.addDetails(details);
            result.setLevel(i);
            if(approximation.length == 1) {
                break; //we can`t decompose more...
            }
            data = approximation; //approximation is data for next decomposition
        }
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        DWTransform1D instance = new HaarWaveletTransform();
        double[] approximationExpect = {2.121320343559, 4.949747468305, 7.778174593052, 4.949747468305};
        double[] detailExpect = {-0.707106781186, -0.707106781186, -0.707106781186, 4.949747468306};

        DecompositionResult result = instance.decompose(data, 1);
        assertArrayEquals(approximationExpect, result.getApproximation(), DOBLE_COMPARISON_DELTA);
        assertArrayEquals(detailExpect, result.getDetailsList().get(0), DOBLE_COMPARISON_DELTA);
    }
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        DWTransform1D instance = new HaarWaveletTransform();
        double[] approximationExpect = {2.121320343559, 4.949747468305, 7.778174593052, 4.949747468305};
        double[] detailExpect = {-0.707106781186, -0.707106781186, -0.707106781186, 4.949747468306};

        DecompositionResult result = instance.decompose(data, 1);
        assertArrayEquals(approximationExpect, result.getApproximation(), DOBLE_COMPARISON_DELTA);
        assertArrayEquals(detailExpect, result.getDetailsList().get(0), DOBLE_COMPARISON_DELTA);

        double[] reconstructed = instance.reconstruct(result);
        assertArrayEquals(data, reconstructed, DOBLE_COMPARISON_DELTA);
    }
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    public void testReconstructionFrom2LevelDecomposition() {
        double[] data = {0, 1, 2, 3, 4, 5, 6, 7};

        DWTransform1D instance = new HaarWaveletTransform();

        DecompositionResult result = instance.decompose(data, 2);

        double[] reconstructed = instance.reconstruct(result);
        assertArrayEquals(data, reconstructed, DOBLE_COMPARISON_DELTA);
    }
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    public void testReconstructionFrom3LevelDecomposition() {
        double[] data = {0, 1, 2, 3, 4, 5, 6, 7};

        DWTransform1D instance = new HaarWaveletTransform();

        DecompositionResult result = instance.decompose(data, 3);

        double[] reconstructed = instance.reconstruct(result);
        assertArrayEquals(data, reconstructed, DOBLE_COMPARISON_DELTA);
    }
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            data[i] = rnd.nextInt(Integer.MAX_VALUE);
        }

        DWTransform1D instance = new HaarWaveletTransform();

        DecompositionResult result = instance.decompose(data);
        assertEquals(power, result.getLevel());
        assertEquals(1, result.getApproximation().length);

        double[] reconstructed = instance.reconstruct(result);

        assertArrayEquals(data, reconstructed, 1);
    }
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    @Test
    public void testReconstructionFrom1LevelWithLeGall() {
        double[] data = {1,2,3,4};

        DWTransform1D instance = new LeGallWaveletTransform();
        DecompositionResult result = instance.decompose(data, 1);

        double[] reconstructed = instance.reconstruct(result);
        assertArrayEquals(data, reconstructed, DOBLE_COMPARISON_DELTA);
    }
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            data[i] = rnd.nextInt(Integer.MAX_VALUE);
        }

        DWTransform1D instance = new LeGallWaveletTransform();

        DecompositionResult result = instance.decompose(data, power - 1);
        assertEquals(power - 1, result.getLevel());
        assertEquals(2, result.getApproximation().length);

        double[] reconstructed = instance.reconstruct(result);

        assertArrayEquals(data, reconstructed, 1);
    }
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Related Classes of ru.ifmo.diplom.kirilchuk.jawelet.core.dwt.DecompositionResult

  • ru.ifmo.diplom.kirilchuk.jawelet.core.dwt.transforms.DWTransform1D
  • ru.ifmo.diplom.kirilchuk.jawelet.dwt.transforms.DiscreteWaveletTransformTest
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