Digital holography dh is a quantitative technique that allows the recovering of the complete wavefront, namely phase and amplitude distributions, scattered by an object by using a two stages process. They share origin, theoretical base, methods and algorithms. Aiming at the question that the existence of zeroorder image has certain effect on the quality of reconstructed images in digital holography, by analysis of spectrum characteristic as well as record and represent theory, two digital image processing algorithm differential substitution and the fir filter are proposed for zeroorder image elimination in digital holography. Digital holography refers to the acquisition and processing of holograms with a digital sensor array, typically a ccd camera or a similar device. Many approaches have been carried out in order to overcome such a problem ranging from modifying the spatial coherence of the illumination optical techniques to image processing techniques digital techniques.
Basic theory of digital sampling and processing common to all these techniques. Osa digital holography and threedimensional imaging 2019. Imaging through nonlinear media using digital holography christopher barsi1, wenjie wan1 and jason w. In the paper, they have presented a new application of digital holography for phasecontrast imaging. Standard 2d image processing techniques can be applied to individual digital holographic reconstructions with varying success. Digital holography and digital image processing are twins born by computer. The technique uses a ccd camera for recording of a digital fresnel offaxis hologram and a numerical method for hologram reconstruction. Application of superresolution image reconstruction to. Selfservice digital image printing and enhancement.
Get up to speed with digital holography with this concise and straightforward introduction to modern techniques and conventions. Yaroslavsky, reconstruction of a hologram with a computer, soviet physicstechnical physics, v. Principles, methods, algorithms pdf,, download ebookee alternative reliable tips for a better ebook reading experience. Digital holography and 3d imaging dh topical meeting. Whereas most books solely address the theory behind these 3d imaging techniques, this monograph concentrates on the exact code needed to perform complex mathematical and physical. Indirect methods can be used16, but none has allowed for the measurement of. Holographic image processing of threedimensional objects. His research interests include speckle metrology, optoacoustic spectroscopy, and optical biosensors.
Digital holography is applied to measure shape and surface deformation of opaque bodies and refractive index. Digital holography comes in different flavors, such as offaxis fresnel, fourier, image plane, inline, gabor and phaseshifting digital holography, depending on the optical setup. Image rendering, or reconstruction of object data is performed numerically from digitized interferograms. Introduction digital holography, in practice, directly retrieves the wrapped phase of the complexoptical eld. Digital holograms can be numerically reconstructed at an arbitrary depth. Osa digital holography and threedimensional imaging 2016. A p p l i e d optics g r o u p d e p a r t ment o f p h y s i c s introduction 7 semester 1. Holography is the only truly threedimensional imaging method available, and matlab has become the programming language of choice for engineering and physics students. Digital holography and digital image processing are twins born by computer era. Reduction of speckle noise in digital holography by using. In fact, holography was first invented for microscopy, and making the recording digital has the benefit of enormous processing power. The recording is performed on an optical table by using an interferometric arrangement to register the interference of a reference wave. The current emphasis of his research program is on the development of new techniques in digital holography, holographic image processing. Digital holography and its multidimensional imaging.
Indeed, digital holography by numerical diffraction of optical fields allows imaging. One important use is in threedimensional microscopy. It considers three different approaches such as off. Digital or electronic holography and its application to 3d display is one of the formidable problems of evolving areas of high technology that has been receiving great attention in recent years. With the digital holographic approach, holograms are directly recorded by a digital camera and reconstructed numerically. Chapter 2 discusses about the use of inline holography to the study of seeded flows. Digital holography has evolved as a robust and informative means of microscopy. The technological developments of digital sensors and optical elements have made dh. Further applications are imaging and microscopy, where it is advantageous to refocusthe area under investigation by numerical methods. Inline digital holographic microscopy dhm is a powerful imaging technique that can be realized around a conventional light microscope. Pdf color reconstructions of real digital holograms in holographic display with white light led illumination tomasz kozacki, maksymilian chlipala, weronika zaperty, and piotr makowski. Request pdf reduction of speckle noise in digital holography by using digital image processing a fundamental problem in optical and digital holography is the presence of speckle noise in the. The difference is in quantity of the parallaxrelated images used for those 3d prints. Digital holography and 3d imaging dh 21 25 april 20 21 april 20 the fairmont orchid, kohala coast, hawaii united states the digital holography and threedimensional imaging dh topical meeting provides a forum for science, technology, and applications of digital holographic and threedimensional imaging and display methods.
The fist chapter introduces the basic fundamentals of digital holography. Pdf in this thesis we discuss and examine the contributions we have made to the field of digital hologram image processing. I have to write a matlab code for my project which detects and measures the. Applications covered include image restoration, medical imaging, surveillance, holography, etc. With the phaseshifting of the reference beam inline holograms for three wavelengths emitted from a hecd laser are recorded simultaneously to derive the.
Digital holography appears to be a strong contender as the nextgeneration technology for holographic diagnostics of particle fields and holographic particle image velocimetry for flow field measurement. Digital holography and digital image processing request pdf. Depthfromfocus is an image processing technique which is used to determine the depth of a scene or a region within a scene through processing images taken at different focal depths. The second chapter discusses the different options and modalities available when designing a digital holographic microscope dhm, including advantages. Fleischer1,2 it is well known that one cannot image directly through a nonlinear medium, as intensitydependent phase changes distort signals as they propagate. Pascal picart has been associate professor at universite du maineecole nationale superieure dingenieurs du mans ensim, le mans, france since 2005. The present book describes these common fundamentals principles, methods and algorithms including image and hologram digitization, data compression, digital transforms and efficient computational algorithms, statistical and montecarlo methods, image. As such, we can resolve the branch points and associated branch cuts in the phase function 1.
The current emphasis of his research program is on the development of new techniques in digital holography, holographic image processing, phase imaging and applications in the field of acoustics, structural mechanics and fluid mechanics. This ebook is a collection of comprehensive and cutting edge book articles written by leading experts on digital signal and image processing in general, and specifically book written by one of pioneers of digital holography, one of the foremost branches of the image sciences and modern information technology. Indeed, the holy grail for 3d display is the realization of lifesize interactive 3d displays. Image processing hologram analogto digital conversion output image computer digital holography. Digital holography is about the acquisition of holographic image data using a digital sensor, and the subsequent processing to reconstruct individual images. Pdf digital hologram image processing researchgate. Download digital holography and digital image processing. Digital holography offers a means of measuring optical phase data and typically delivers threedimensional surface or optical thickness images.
In lenticular printing only few tents images can be used for 3d perception creation in digital holography are used. Digital holography has suffered from the low resolution of ccd sensors, which significantly limits the. Digital holography dh has emerged as one of the most effective coherent imaging technologies. Image processing hologram analogtodigital conversion output image computer digital holography. This spotlight begins with an introduction to digital holographic microscopy via a brief history of holography. Dufaux, digital holographic data representation and compression, academic press to be published.
This not only eliminates wet chemical processing and mechanical. Digital holography and digital image processing springerlink. Hi, im working on a project which is about digital inline holographic microscopy. In recent years, moores law has fostered the steady growth of the field of digital image processing, though the computational complexity remains a problem for most of the digital image processing applications. Request pdf on jan 1, 2004, leonid yaroslavsky and others published digital holography and digital image processing find, read and cite all the research. The reconstruction of a hologram digitized with 512. Strategies for reducing speckle noise in digital holography. Digital holography for quantitative phasecontrast imaging. The method simultaneously provides an amplitudecontrast image and a quantitative phasecontrast image. Digital holography can be adapted appropriately for. Applications of digital image processing xxxviii, san diego, ca, august 2015 to be published y. Principles and techniques of digital holographic microscopy. Digital holography offers a number of significant advantages, such as the ability to acquire holograms rapidly, availability of complete amplitude and phase information of the optical field, and versatility of the interferometric and image processing techniques. Imaging through nonlinear media using digital holography.
Building up from the basic principles of optics, this book describes key techniques in digital holography, such as phaseshifting holography, lowcoherence holography, diffraction tomographic holography and optical scanning holography, discussing their practical. Digital recording and numerical reconstruction of holograms. Digital holography fourier optics and computational. The book is also useful for scientists and engineers, and for those who simply want to learn about optical image processing and digital holography. With matlab ebooks pdf excellent book is always being the best friend for spending little time in your office, night time, bus, and. Pdf new techniques in digital holography iste download. Digital holography and digital image processing principles.
684 1119 1153 82 764 1136 1599 305 708 1176 840 1683 785 1211 919 1490 1346 794 1622 244 1576 258 877 1052 1570 1540 1101 491 620 374 1090 1444 219 1123 1083 410