Compressed Sensing-Based MRI Reconstruction Using Complex Double-Density Dual-Tree DWT

Figure 3

Improved directionality of complex double-density dual-tree wavelet transform: (a) original test image; reconstructed image using only the lowest level coefficients of (b) DWT; (c) DT-CWT; (d) CDDDT-DWT; (e)–(h) results of the same experiment with noisy image (zoomed-in at the right corner). Gray level is normalized between [0,1] for all images and 4-level transform is used for all experiments.

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