The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Rotation and scale-invariant pattern recognition using WCHF-fSDF filter

WCHF-fSDF 필터를 이용한 회전과 크기불변 패턴 인식

  • 이승희 (대경전문대학 컴퓨터정보과) ;
  • 김철수 (김천전문대학 전파통신과) ;
  • 이하운 (동양대학교 전자 제어 통신공학부) ;
  • 도양회 (제주대학교 전자공학과) ;
  • 박세준 (경북대학교 전자전기공학부) ;
  • 김수중 (경북대학교 전자전기공학부)
  • Published : 1997.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper we porposed WCHF-fSDF filter to obtain a roration and scale-invariant correlation output. WCHF-fSDF filter is synthesized by each single CHF exttracted from scale-changed and wavelet tranformed imagesfor a refereence image as tranining images. The wavelet transform is defined as the correlation of an input image with a wavelet function. Therefore two 4f optical correlation systems are needed for pattern recognition using wavelet transform. We here include the wavelet function for the input image in the process of the proposed filter design and substitute the two 4f optical correlation system with a single 4f optical correlation system. The Performances of the proposed filter are compared with conventional CHF-SDF, POCHF-SDF filters through the computer simulation. The results of computer simulation show that the proposed filter has the rotation and scale-invariant correlation output and it has better performances than thoseof the conventioanl filters.

Keywords

References

  1. Optics Comm. v.67 no.3 Shift and scale invariant pattern recognition using Mellin radial harmonics D. Mendlovic;E. Marom;N. Konforti
  2. Appl. Opt. v.21 no.22 Optical pattern recognition using circular harmonic expansion Y. Hsu;H. H. Aresenault
  3. Appl. Opt. v.23 no.10 Unified synthetic discriminant functio computational formulation D. Casasent
  4. Appl. Opt. v.25 no.14 Correlation synthetic discriminant functions D. Casasent;W. T. Chang
  5. Appl. Opt. v.34 no.32 Synthetic circular-harmonic phase-only filter for shift, rotation, and scaling-invariant correlation Liang;Dalsgaard
  6. Opt. Eng. v.31 no.9 Optical wavelet transform Y. Sheng;D. Roberge;H. Szu
  7. Opt. Lett. v.18 no.4 Optical wavelet matched filters for shift-invariant pattern recognition Y. Sheng;D. Rogerge;H. Szu;T. Lu
  8. Optics Comm. v.112 Rotational invariant pattern recognition using a composite circular harmonic and 2D isotropic Mexican-hat wavelet filter Y. Cheng;T. Liang
  9. Appl. Opt. v.31 no.17 Wavelet transform as a bank of the matched filters H. Szu;Y. Sheng;J. Chen
  10. Appl. Opt. v.28 no.22 Inclusion of filter modulation in synthetic discriminant function construction D. A. Jared;D. J. Ennis