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Proceedings Paper

Sampled hard edge reconstruction: definition of frequency modulation function for a sampling-reconstructing system (not quantized)
Author(s): I. Sanz
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Paper Abstract

In Fig. 1 , we introduce a systematic diagram of a simple sampling-reconstructing system (SRS) where X„, is the sampling interval and xc. is the filter cutoff frecuency.We asume a non isoplanatic system.Therefore, one avoids applying linear system properties.The meaning of a MTF associated with the SRS is here not fully related with standard MTF definitions. We analyze the system response to an edge , and apply the well known transformation LSF/MTF. As the Sampling Theorem states , functions with non-compact support cannot be entirely reconstructed. Main problems are : a) lossing of high frecuencies. b) Modification in low frecuency carrier due to aliasing. Following the mentioned theorem we analyze the influence of various filter functions in the sampled reconstructed hard finite edge. Analyzing the corresponding responses we shall introduce the concept of frecuency modulation function as an alternative to standard MTF.The sampled finite hard edge and corresponding spectrum are defined:

Paper Details

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 27786H (1 September 1996); doi: 10.1117/12.2299116
Show Author Affiliations
I. Sanz, Univ. Complutense de Madrid (Spain)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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