Inversion-free image recovery from strong aberration using a minimally sampled transmission matrix
Autor: | Hoon Jai Chun, Kwanjun Park, Taeseok Daniel Yang, Youngwoon Choi, Beop Min Kim, Hyung Jin Kim, Hyuk Soon Choi, Jung Min Lee, Taedong Kong |
---|---|
Rok vydání: | 2019 |
Předmět: |
0301 basic medicine
Physics Multidisciplinary business.industry Phase correction lcsh:R lcsh:Medicine Inverse transform sampling Transmission matrix Inversion (meteorology) Iterative reconstruction Phase retardation Article Image recovery 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Optics Characteristic response lcsh:Q lcsh:Science business 030217 neurology & neurosurgery |
Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019) |
ISSN: | 2045-2322 |
DOI: | 10.1038/s41598-018-38027-y |
Popis: | A transmission matrix (TM), a characteristic response for an input-output relation of an optical system, has been used for achieving diffraction-limited and aberration-free images through highly-aberrant imaging systems. However, its requirement of acquiring a huge-size TM along with its heavy computational load limit its widespread applications. Here we propose a method for TM-based image reconstruction, which is more efficient in terms of data manipulation and computational time. Only 10% of the TM elements for a fish-eye (FE) lens with strong aberration were sampled compared to that required for the image reconstruction by the conventional inversion method. The missing information was filled in by an iterative interpolation algorithm working in k-space. In addition, as a replacement of the time-consuming matrix inversion process, a phase pattern was created from the minimally sampled TM in order to compensate for the angle-dependent phase retardation caused by the FE lens. The focal distortion could be corrected by applying the phase correction pattern to the angular spectrums of the measured object images. The remaining spatial distortion could also be determined through the geometrical transformation also determined by the minimally sampled TM elements. Through the use of these procedures, the object image can be reconstructed 55 times faster than through the use of the usual inversion method using the full-sized TM, without compromising the reconstruction performances. |
Databáze: | OpenAIRE |
Externí odkaz: |
Pro tento záznam nejsou dostupné žádné jednotky.