대한전자공학회논문지 (Journal of the Korean Institute of Telematics and Electronics)
- 제25권7호
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- Pages.826-835
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- 1988
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- 1016-135X(pISSN)
영상 피라미드를 위한 최적 Half-Band FIR 필터
An Optimal Half-Band FIR Filter for Image Pyramied
초록
In this paper, we analyze the generation of an image pyramid as a 2-dimensional decimation-interpolation process, and suggest a performance index of FIR filter for decimation and interpolation filter. Until now, most deciamtion and interpolation filters are designed via the approximation of the impulse response of an ideal filter. In this paper, however, we propose a new performance index that minimizes the maximum frequency-weighted mean square error between the desired and the generated interpolated signal, and propose an optimal half-band filter based on the proposed performance index as an example. Some simulation results with real images show that the proposed optimal half-band filter yields a higher PSNR as well as the more preferable image quality, in comparison with other currently used filters with the same computational complexity.
키워드