Denoising Seismic Data via a Threshold Shrink Method in the Non-Subsampled Contourlet Transform Domain

Figure 4

Example of NSCT processing. (a) Synthesized seismic signal data with noise. (b) Approximate NSCT coefficients. Seismic signals of the detailed NSCT coefficients at scale 2, 2 directions (c) and scale 1, 4 directions (d).

(a)

(b)

(c)

(d)