Rekonstrukcija mikroskopskog objekta metodom sažimajućeg očitavanja

master's thesis

• Title (english): Microscopic Object Reconstruction Using Compressive Sensing Method
• Author: Ana Škaro
• Mentor: Damir Seršić (mentor)
• Committee member: Damir Seršić (predsjednik povjerenstva)
• Committee member: Davor Petrinović (član povjerenstva)
• Committee member: Ana Sović Kržić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

U laserskoj mikroskopiji, mikroskopski objekt je osvjetljen koherentnim laserskim
svjetlom odred̄ene valne duljine. Optički sustav je zasnovan na Fresnelovoj optici, a
rešetkaste strukture koriste se umjesto leće. Autori rada [1] za rekonstrukciju oblika
promatranog objekta koriste informaciju o pomaku svjetlosti uzrokovanom prolaskom
svjetlosti kroz objekt. Unutar ovog diplomskog rada, u simulacijski model razvijen
u sustavu MATLAB, se nakon klasične optičke rešetke postavljaju mjerne rešetke
sažimajućeg očitavanja. Iz mjerenja, čiji je broj znatno manji od Nyquistovog broja,
rekonstruira se fazni gradijent objekta u visokoj rezoluciji, korištenjem l1-minimizacije.

Abstract (english)

In laser microscopy, a microscopic object is exposed to a coherent laser light of
specific wavelength. The optic system is built on the principles of Fresnel optics, using
the attenuating grid instead of lens. In [1] phase gradients in the sample modify the grid
reference pattern and are used for the reconstruction of the observed object’s thickness.
In this thesis, compressive sensing measurement masks are added to the simulation
model developed in MATLAB environment. High resolution phase gradient is then
reconstructed from a low number of measurements (much lower than the required
Nyquist rate) using the l1-minimization algorithm.

• Keywords: sažimajuće očitavanje; rijetko modeliranje; obrada signala; laserski mikroskop; fazni gradijent; Fresnelova optika
• Keywords (english): compressive sensing; sparse modeling; singal processing; laser microscope; phase gradient; Fresnel optics
• Language: croatian
• URN:NBN: urn:nbn:hr:168:844265
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-14 01:18:46