A fast efficient computation of cubic-spline interpolation in image codec
It is shown that cubic-spline interpolation (CSI) can be performed by a fast and efficient computation for the encoding and decoding processes of image coding. It requires substantially fewer additions and multiplications than the original CSI algorithm. Furthermore, a new type of overlap-save schem...
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| Veröffentlicht in: | IEEE transactions on signal processing 2001-06, Vol.49 (6), p.1189-1197 |
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| container_issue | 6 |
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| container_title | IEEE transactions on signal processing |
| container_volume | 49 |
| creator | Lung-Jen Wang Wen-Shyong Hsieh Trieu-Kien Truong Reed, I.S. Cheng, T.C. |
| description | It is shown that cubic-spline interpolation (CSI) can be performed by a fast and efficient computation for the encoding and decoding processes of image coding. It requires substantially fewer additions and multiplications than the original CSI algorithm. Furthermore, a new type of overlap-save scheme is utilized to solve the boundary-condition problems that occur between two neighboring subimages in the actual image. It is also shown that a very efficient nine-point Winograd discrete Fourier transform (WDFT) can be used to replace the fast Fourier transform (FFT) needed to implement the CSI scheme in the modified JPEG encoder. Finally, the proposed fast new CSI algorithm with a compression ratio of 9:1 is used along with the JPEG standard to speed up the modified JPEG encoder-decoder and still obtain a better quality of reconstructed image for higher compression ratios. |
| doi_str_mv | 10.1109/78.923301 |
| format | Article |
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| subjects | Algorithms Applied sciences Codecs Coding, codes Compression ratio Computational efficiency Decoding Discrete Fourier transforms Exact sciences and technology Fast Fourier transforms Fourier transforms Image coding Image compression Image processing Image reconstruction Information, signal and communications theory Interpolation JPEG encoders-decoders PSNR Signal and communications theory Signal processing Signal processing algorithms Telecommunications and information theory Transform coding |
| title | A fast efficient computation of cubic-spline interpolation in image codec |
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