Computer-Generated Holograms of Three-Dimensional Objects Synthesized from Their Multiple Angular Viewpoints

this paper is concerned mainly with a new method of computing the complex function s(u, v) from the object function t(x s , y s , z s ) rather than in a coding method of the final CG

Invited Paper Noninvasive optical tomographic imaging by speckle ensemble

We survey recently invented methods of optical tomographic imaging through scattering medium. The threedimensional structure of an object hidden between two biological tissues is recovered from many noisy speckle pictures obtained on the output of a multi-channeled optical imaging system

References

through biological tissues using the fl

CThC5 2005 Conference on Lasers & Electro-Optics (CLEO) Towards Reconstruction ofEmbedded Objects with Multiple Spackle Images for Medical Diagnostics

Abstract: Anew methodofseeing objects hidden in scatteringmedium from multiple speckle images is demonstrated. The entire noisy images from lens array are digitally processed to obtain the desired image ofthe hidden objects. 1

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Reconstruction objects hidden in scattering medium using microlens arra

NOISE 2 imaging system: seeing through scattering tissue with a reference point

We propose a f ly-eye-like imaging system for seeing objects embedded in scattering media. Objects are recovered from many speckled images observed by a digital camera through a microlens array. Each microlens in the array generates a speckle image of the object buried between two layers of chicken breast tissue. In the computer each image is Fourier transformed jointly with an image of the speckled pointlike source captured under the same conditions. A set of the squared magnitudes of the Fourier-transformed pictures is accumulated to form a single average picture. This final picture is again Fourier transformed, resulting in the reconstruction of the hidden object. © 2004 Optical Society of America OCIS codes: 030.6140, 030.6600, 170.1650, 170.3010, 170.3880. During the past decade, optical imaging through scattering media has proved to be an effective medical diagnostic because it is safe, noninvasive, and lower in cost than conventional radiation techniques. Many optical techniques for imaging through diffusing tissues have been proposed, 1 despite the strong attenuation and scattering of light caused by tissue constituents

Stereoscopic imaging through scattering media

We develop and experimentally test a method for three-dimensional imaging of hidden objects in a scattering medium. In our scheme, objects hidden between two biological tissues at different depths from the viewing system are recovered, and their three-dimensional locations are computed. Analogous to a fly’s two eyes, two microlens arrays are used to observe the hidden objects from different perspectives. At the output of each lens array we construct the objects from several sets of many speckled images with a previously suggested technique that uses a reference point. The differences of the reconstructed images in both arrays with respect to the reference point yield the information regarding the relative depth among the various objects

Noninvasive optical imaging by speckle ensemble

We propose a new method imaging through scattering media. An object hidden between two biological tissues (chicken breast) is reconstructed from any speckled images obtained from the output of a multichannel optical imaging system. The effect of multiple imaging is achieved with a microlens array. Each lens is the array projects a different speckled image onto a digital camera. The set of speckled images from the entire array is first shifted to a common center and then accumulated into a single average picture