access icon free Hybrid image denoising method based on non-subsampled contourlet transform and bandelet transform

The second generation bandelet transform uses the two-dimensional (2D) separable wavelet transform to improve its image denoising and compression performance. However, the 2D separable wavelet transform is not a shift-invariant transform and therefore cannot capture geometric information well. The authors propose a hybrid image denoising method in which the 2D separable wavelet transform in the second generation bandelet transform is replaced with the non-subsampled contourlet transform. The results of the application of the proposed method to several greyscale and colour benchmark images contaminated with various levels of Gaussian white noise and Poisson noise indicate that the proposed method has good peak signal-to-noise ratio and visual quality performance.

Inspec keywords: image colour analysis; wavelet transforms; image denoising; AWGN

Other keywords: Poisson noise; greyscale image; Gaussian white noise; peak signal-to-noise ratio; visual quality performance; hybrid image denoising method; nonsubsampled contourlet transform; colour benchmark image; second generation bandelet transform

Subjects: Integral transforms; Computer vision and image processing techniques; Integral transforms; Optical, image and video signal processing

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-ipr.2017.0647
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