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Wavelet domain image resolution enhancement

Wavelet domain image resolution enhancement

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A wavelet-domain image resolution enhancement algorithm which is based on the estimation of detail wavelet coefficients at high resolution scales is proposed. The method exploits wavelet coefficient correlation in a local neighbourhood sense and employs linear least-squares regression to estimate the unknown detail coefficients. Results show that the proposed method is considerably superior to conventional image interpolation techniques, both in objective and subjective terms, while it also compares favourably with competing methods operating in the wavelet domain.

Inspec keywords: interpolation; least squares approximations; image enhancement; wavelet transforms; image resolution

Other keywords: image interpolation; detail wavelet coefficients; linear least-squares regression; wavelet coefficient correlation; wavelet-domain image resolution enhancement algorithm

Subjects: Optical, image and video signal processing; Integral transforms in numerical analysis; Integral transforms in numerical analysis; Computer vision and image processing techniques; Interpolation and function approximation (numerical analysis); Interpolation and function approximation (numerical analysis)

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