Principles and techniques of digital holographic microscopy
... Holography was invented in 1948 by Dennis Gabor in an effort to improve the resolution
of the electron microscope, where the correction of electron lens aberrations posed increasing
technical difficulty. Instead of attempting to perfect the electron imaging lens, Gabor dispensed
it altogether and re ...
Three-Dimensional Imaging and Processing Using Computational
... of this technique was made possible by advancements in
charge-coupled device (CCD) and CMOS image sensor technology. An advantage of digital holography is that the hologram is directly obtained in digital form. There is no need for
an analog recording of the hologram and the corresponding
chemical o ...
Wide viewing angle holographic display with a multi spatial light
... optoelectronic modules which are adopted to generate a large number of data points  or to increase holographic
display angular view ability [6,7].
In this paper we present a holographic display configuration where multiple SLMs aligned in circular configuration
are put to work together. Such conf ...
a PDF of the paper on this project published in the OCEANS 2005
... cinematography system that has a real-time fiber optic
communication link. This system collects dual-view digital
holograms at a rate of 15 frames per second, enabling the
user to observe the behavior of marine plankton and
distinguish motile organisms from abiotic particles. In order
to follow the ...
Autofocus for Digital Fresnel Holograms by Use of a Fresnelet
... maximum in a single leap (when the function is parabolic, which is more likely if it
is sufficiently smooth) and vice versa [47, p. 397–405].
The focusing problem may be summarized as follows: we aim at finding the
best Fresnelet basis such that as much of the image energy is encoded with as few
Digital holography of total internal reflection
... holography offers a number of important advantages such as the ability to acquire images
rapidly, the availability of both amplitude and phase information of the optical field, and
versatility of the image processing techniques that can be applied to the complex field data.
Indeed, digital holograph ...
... a direct conversion x-ray detector are shown in figure 3.8.
An Indium Tin Oxide (ITO) electrode (labeled A) is uniformly deposited on the
photoconducting layer usually with thermal evaporation. This electrode is called the ‘top
electrode’. The top electrode is positively biased with a high voltage t ...
... which these two techniques are applied over the input image
will also be important. The results of applying this compared
approach to Fig. 2 are shown in Fig 6.
From the images shown above, it is possible to state
that better results in speckle noise reduction are achieved by
merging the two formerl ...
Preface The history of science is, to a considerable degree, the
... The history of science is, to a considerable degree, the history of invention,
development and perfecting of imaging methods and devices. Modern science began
with the invention and application of optical telescope and microscope in the
beginning of 17-th century by Galileo Galilei (1564-1642), Anth ...
(Digital Micro-Mirror Device) Based Multi-Object
... arbitrary regions of interest. In addition it will be possible
to do multi-object spectroscopy by carefully designing a
mask that allows several spectrally different objects in the
scene to be rapidly measured in sequence.
We will focus on spectral measurements in the visual
and near-infrared part o ...
PASSIVE MILLIMETER-WAVE IMAGING WITH EXTENDED DEPTH OF FIELD AND SPARSE DATA
... of the scene. (b) Image produced using a 94-GHz imaging system.
In this paper, we describe a passive mmW imaging system with
extended depth-of-field that can produce images with reduced number of samples. We show that if the mmW image is assumed to be
sparse in some transform domain, then one can re ...
Digital X-Ray Imaging - Experimental Elementary Particle Physics
... reduced in some situations where a noisier image can be accepted. The rapid availability of the image can also be helpful. A good example is stereotactic localization,
where ﬁlms must be reviewed before the procedure can be completed.
Another important limitation of screen/ﬁlm imaging is that the im ...
Digital imaging or digital image acquisition is the creation of digital images, such as of a physical scene or of the interior structure of an object. The term is often assumed to imply or include the processing, compression, storage, printing, and display of such images.Digital imaging can be classified by the type of electromagnetic radiation or other waves whose variable attenuation, as they pass through or reflect off objects, conveys the information that constitutes the image. In all classes of digital imaging, the information is converted by image sensors into digital signals that are processed by a computer and outputted as a visible-light image. For example, the medium of visible light allows digital photography (including digital videography) with various kinds of digital cameras (including digital video cameras). X-rays allow digital X-ray imaging (digital radiography, fluoroscopy, and CT), and gamma rays allow digital gamma ray imaging (digital scintigraphy, SPECT, and PET). Sound allows ultrasonography (such as medical ultrasonography) and sonar, and radio waves allow radar. Digital imaging lends itself well to image analysis by software, as well as to image editing (including image manipulation).