Incorporation of polar Mellin transform in a hybrid optoelectronic correlator for scale and rotation invariant target recognition

Mehjabin Sultana Monjur*, Shih Tseng, Renu Tripathi, M. S. Shahriar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this paper, we show that our proposed hybrid optoelectronic correlator (HOC), which correlates images using spatial light modulators (SLMs), detectors, and field-programmable gate arrays (FPGAs), is capable of detecting objects in a scale and rotation invariant manner, along with the shift invariance feature, by incorporating polar Mellin transform (PMT). For realistic images, we cut out a small circle at the center of the Fourier transform domain, as required for PMT, and illustrate how this process corresponds to correlating images with real and imaginary parts. Furthermore, we show how to carry out shift, rotation, and scale invariant detection of multiple matching objects simultaneously, a process previously thought to be incompatible with PMT-based correlators. We present results of numerical simulations to validate the concepts.

Original languageEnglish (US)
Pages (from-to)1259-1272
Number of pages14
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume31
Issue number6
DOIs
StatePublished - Jun 1 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition

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