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Synthetic Aperture Ultrasound Imaging through Adaptive Integrated Transmitting-Receiving Beamformer
Ultrasonic Imaging, 2023Synthetic aperture (SA) technique is very attractive for ultrafast ultrasound imaging, as the entire medium can be insonified by a single emission. It also permits applying the dynamic focusing as well as adaptive beamforming both in transmission and reception, which results in an enhanced image.
Hasti Rostamikhanghahi +1 more
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Integrated Denoised Synthetic Aperture Radar Images for Enhanced Digital Elevation Model Generation
Journal of Aerospace Information Systems, 2022Synthetic aperture radar (SAR) enables imaging of topographic surfaces day and night in different atmospheric conditions.
Tarek A. Mahmoud +2 more
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Hologram synthesis using integral imaging camera with synthetic aperture technique
SPIE Proceedings, 2013We present a method to synthesize a hologram of real-existing three-dimensional object under incoherent illumination. The proposed method uses an integral imaging camera which has a microlens array on the image sensor plane of usual two-dimensional camera.
Sung-Keun Lee +3 more
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Optical slicing of large scenes by synthetic aperture integral imaging
SPIE Proceedings, 2010Integral imaging (InI) technology was created with the aim of providing the binocular observers of monitors, or matrix display devices, with auto-stereoscopic images of 3D scenes. However, along the last few years the inventiveness of researches has allowed to find many other interesting applications of integral imaging.
Héctor Navarro +5 more
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Imaging ocean waves by synthetic aperture radars with long integration times
IEEE Transactions on Antennas and Propagation, 1981Previously developed theories for the imaging mechanism of ocean waves by synthetic aperture radars (SAR's) apply only for short integration times T (typically, T s). To what extent long integration times modify these theories is investigated. First, an analytical expression describing the effect of systematic wave motions on radar imagery valid for ...
Rufenach, C., Alpers, W.
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Image speckle contrast reduction resulting from integrative synthetic aperture imaging
Applied Optics, 1992Reduction of image speckle noise with the use of an integrative synthetic aperture imaging technique is studied. It is found that the Fourier inversion of the mutual intensity estimate [Appl. Opt. 30, 206-213 (1991)] yields an image intensity that corresponds exactly to the illumination of the object with partially coherent light from source optics ...
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Exploiting incoherent synthetic apertures in integral imaging for optical super-resolution
Optics LettersIntegral imaging (InIm) working with a pixelated device (e.g., a display panel) and a microlens array (MLA) suffers from low spatial resolution because of a significant trade-off between the spatial and angular resolution. The system bandwidth is presumed to be limited by the Nyquist frequency set by the pixel pitch.
Yifan Ding +6 more
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3D optical microscopy method based on synthetic aperture integral imaging
3D Research, 2012In this paper, we propose a 3D optical microscopy system based on synthetic aperture integral imaging (SAII) and apply it to a surface extraction application. In the proposed system, the micro-object is optically magnified in optical microscope system and the elemental images of magnified micro-object are recorded using the SAII sensing method.
Joon-Jae Lee +3 more
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Focusing of synthetic aperture radar ocean images with long integration times
Journal of Geophysical Research: Oceans, 1991Synthetic aperture radar (SAR) images obtained in the SAR and X Band Ocean Nonlinearities: Chesapeake Light Tower (SAXON:CLT) experiment are processed with long integration times (6 s) and analyzed to study the effects of focusing. Two images with near‐azimuth‐traveling waves were chosen for the study.
Dayalan P. Kasilingam +2 more
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Estimator and signal-to-noise ratio for an integrative synthetic aperture imaging technique
Applied Optics, 1991An imaging system is described which uses the following concepts: laser illumination of objects, nonredundant apertures, and phase closure. A sparse transmitter array is envisioned, each aperture of which emits at a different laser frequency such that any pair of beams gives rise to a unique beat signal. The light reflected by an object thus irradiated
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