White light JTC for color pattern recognition

Hongchen Zhai, Xiushan Zhu, Guoguang Mu

Research output: Contribution to journalConference articlepeer-review


A joint transform correlator (JTC) with white light source and a tri-color grating in the input plane is used to encode color patterns into different space frequencies. Four channels of spatial spectrum are used for parallel color pattern recognition. The tri-color grating is made up of three Rochi gratings in three different orientations for red, green and blue primary colors, respectively. Results showed that a strong correlation peak and a shape-only correlation peak appear in the green channel and in the zero order channel, respectively, and no correlation peak appears in the red or blue channel.

Original languageEnglish (US)
Pages (from-to)213-214
Number of pages2
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 18th Congress of the International Commission for Optics (ICO XVIII): Optics for the Next Millennium - San Francisco, CA, USA
Duration: Aug 2 1999Aug 6 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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