대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1979년도 하계 전자.전기연합학술발표회논문집
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- Pages.164-165
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- 1979
Development of Two Dimensional Filter for the Reconstructive Image Processing
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Lee, Hwang-Soo
(Department of Electrical Science Korea Advanced Institute of Science)
- 발행 : 1979.08.03
초록
Two dimensional kernels which reconstruct the tomographic image from the blurred one formed by simple back-projection are investigated and their performances are compared. These kernels are derived from tile point spread function of the tomographic system and have the form of a ramp filter modified by several window functions to suppress ringing in the reconstruction. Computer simulation using a computer generated phantom image data with different correction functions(kernels) has been carried out. In this simulation, filtering in frequency domain by 2-D FFT technique or in space domain by 2-D direct convolution is considered. It is found that the-computation time required for real space convolution technique is much larger than that of Fourier 2-D filtering technique in the pratical situation.
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