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[Research on the interlaced encoding pixels in Hadamard transform spectral imager based on DMD].

Jun Xu1, Bing-liang Hu, Da-zheng Feng

  • 1Key Laboratory of Spectral Imaging Technique, Xi' an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China. xjsdcq@163.com

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
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A new method addresses interlaced encoding in Hadamard transform spectral imagers (HTSI) using digital micro-mirror devices (DMD). This technique improves spectral image quality by accurately decoding affected pixels.

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Area of Science:

  • Optics and Photonics
  • Image Processing
  • Spectroscopy

Context:

  • Hadamard transform spectral imagers (HTSI) utilize digital micro-mirror devices (DMD) for spectral encoding.
  • The integration of DMD introduces an interlaced encoding phenomenon, complicating spectral recovery.
  • Existing methods lack specific strategies for handling these interlaced pixels.

Purpose:

  • To investigate and analyze the interlaced encoding phenomenon in DMD-based HTSI.
  • To develop a novel positioning and decoding method for interlaced encoding pixels.
  • To enhance the quality of recovered spectral images from HTSI.

Summary:

  • An interlaced encoding phenomenon caused by DMD in HTSI was identified and analyzed.
  • A positioning method was developed to identify interlaced pixels, and a decoding method was proposed.
  • This method decodes interlaced pixels by applying inverse Hadamard transform to a second set of encoded images.

Impact:

  • The proposed method effectively distinguishes and decodes interlaced encoding pixels.
  • Experimental results validate the feasibility and effectiveness of the decoding technique.
  • This work significantly improves the spectral image recovery quality in DMD-based HTSI systems.