Haar Wavelet Transform.

References: Musawir Ali, An Introduction to Wavelets and the Haar Transform. Available on: http://www.cs.ucf.edu/~mali/haar/

Inheritance: IWavelet
Esempio n. 1
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        public void wavletHaartInverseSoft(double[] w)
        {
            deNoisedSignalSoft = new double[w.Length];

            Array.Copy(w, 0, deNoisedSignalSoft, 0, w.Length);
            IWavelet         wavelet = new Accord.Math.Wavelets.Haar(m);
            WaveletTransform target  = new WaveletTransform(wavelet);

            wavelet.Backward(deNoisedSignalSoft);
        }
Esempio n. 2
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        public void wavletHaarForward()
        {
            wavlet = new double[n];
            dij    = new double[n / 2];

            Array.Copy(dataForExamination, 0, wavlet, 0, dataForExamination.Length);

            IWavelet         wavelet = new Accord.Math.Wavelets.Haar(m);
            WaveletTransform target  = new WaveletTransform(wavelet);

            wavelet.Forward(wavlet);

            Array.Copy(wavlet, n / 2, dij, 0, dij.Length / 2);
        }
Esempio n. 3
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        public void WaveletTransformConstructorTest()
        {
            // Start with a grayscale image
            Bitmap src = Properties.Resources.lena512; 
            
            // Create a wavelet filter            
            IWavelet wavelet = new Accord.Math.Wavelets.Haar(2);
            WaveletTransform target = new WaveletTransform(wavelet);

            // Apply the transformation
            Bitmap dst = target.Apply(src);

            // Revert the transformation
            target.Backward = true;
            Bitmap org = target.Apply(dst);

            double[,] actual = org.ToDoubleMatrix(0);
            double[,] expected = src.ToDoubleMatrix(0);

            Assert.IsTrue(actual.IsEqual(expected, 0.102));
        }
        public void WaveletTransformConstructorTest()
        {
            // Start with a grayscale image
            Bitmap src = Properties.Resources.lena512;

            // Create a wavelet filter
            IWavelet         wavelet = new Accord.Math.Wavelets.Haar(2);
            WaveletTransform target  = new WaveletTransform(wavelet);

            // Apply the transformation
            Bitmap dst = target.Apply(src);

            // Revert the transformation
            target.Backward = true;
            Bitmap org = target.Apply(dst);

            double[,] actual   = org.ToDoubleMatrix(0);
            double[,] expected = src.ToDoubleMatrix(0);

            Assert.IsTrue(actual.IsEqual(expected, 0.102));
        }
Esempio n. 5
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        public void WaveletTransformConstructorTest()
        {
            // Start with a grayscale image
            Bitmap src = Accord.Imaging.Image.Clone(Resources.lena512);

            // Create a wavelet filter
            IWavelet         wavelet = new Accord.Math.Wavelets.Haar(2);
            WaveletTransform target  = new WaveletTransform(wavelet);

            // Apply the transformation
            Bitmap dst = target.Apply(src);

            // Revert the transformation
            target.Backward = true;
            Bitmap org = target.Apply(dst);

            double[,] actual; new ImageToMatrix().Convert(org, out actual);
            double[,] expected; new ImageToMatrix().Convert(src, out expected);

            Assert.IsTrue(actual.IsEqual(expected, atol: 0.102));
        }