Enhanced Reconstruction of Spatially Incoherent Digital Holograms Using Synthetic Point Spread Holograms †

Vijayakumar Anand, Joseph Rosen, Soon Hock Ng, Tomas Katkus, Denver P. Linklater, Elena P. Ivanova, Saulius Juodkazis

Research output: Contribution to journalArticlepeer-review


Coded aperture imaging (CAI) methods offer multidimensional and multispectral imaging capabilities with minimal resources than what is needed in a lens-based direct imager. In the CAI method, the light diffracted from an object is modulated by a coded mask, and the resulting intensity distribution is recorded. Most of the CAI techniques involve two steps: the recording of the point spread function (PSF) and object intensity under identical conditions and with the same coded mask. The image of the object is reconstructed by computationally processing the PSF and object intensity. The above recording and reconstruction procedure precludes the introduction of special beam characteristics in imaging, such as a direct imager. In this study, a postprocessing approach is developed, where synthetic PSFs capable of introducing special beam characteristics when processed with the object intensity are generated using an iterative algorithm. The method is applied to generate edge-enhanced images in both CAI as well as Fresnel incoherent correlation holography methods.

Original languageEnglish
Article number37
JournalEngineering Proceedings
Issue number1
StatePublished - 1 Jan 2021


  • coded aperture imaging
  • edge enhancement
  • Fresnel incoherent correlation holography
  • high-speed imaging
  • holography
  • incoherent imaging
  • phase-retrieval algorithm

ASJC Scopus subject areas

  • Biomedical Engineering
  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering


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