IEEE Trans Image Process - Simplified 2-D cubic spline interpolation scheme using direct computation algorithm.

Tópicos

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Resumo

It has been shown that the 2-D cubic spline interpolation (CSI) proposed by Truong et al. is one of the best algorithms for image resampling or compression. Such a CSI algorithm together with the image coding standard, e.g., JPEG, can be used to obtain a modified image codec while still maintaining a good quality of the reconstructed image for higher compression ratios. In this paper, a fast direct computation algorithm is developed to improve the computational efficiency of the original FFT-based 2-D CSI methods. In fact, this algorithm computes the 2-D CSI directly without explicitly calculating the complex division usually needed in the FFT or Winograd discrete Fourier transform (WDFT) algorithm. In addition, this paper describes a novel way to derivate the 2-D CSI from the 1-D CSI by using the row-column method. This new fast 2-D CSI provides a regular and simple structure based upon linear correlations. Therefore, it can be implemented by the use of a modification of Kung?s pipeline structure and is naturally suitable for VLSI implementations. Experimental results show that the proposed new fast 2-D CSI algorithm can achieve almost the same CSI performance with much fewer arithmetic operations in comparison with existing efficient algorithms.

Resumo Limpo

shown d cubic spline interpol csi propos truong et al one best algorithm imag resampl compress csi algorithm togeth imag code standard eg jpeg can use obtain modifi imag codec still maintain good qualiti reconstruct imag higher compress ratio paper fast direct comput algorithm develop improv comput effici origin fftbase d csi method fact algorithm comput d csi direct without explicit calcul complex divis usual need fft winograd discret fourier transform wdft algorithm addit paper describ novel way deriv d csi d csi use rowcolumn method new fast d csi provid regular simpl structur base upon linear correl therefor can implement use modif kung pipelin structur natur suitabl vlsi implement experiment result show propos new fast d csi algorithm can achiev almost csi perform much fewer arithmet oper comparison exist effici algorithm

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