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Lensless Imaging With Compressive Ultrafast Sensing [PDF]
IEEE Transactions on Computational Imaging, 2017 Lensless imaging is an important and challenging problem. One notable solution to lensless imaging is a single pixel camera which benefits from ideas central to compressive sampling. However, traditional single pixel cameras require many illumination patterns which result in a long acquisition process.
Matthew Tancik, Guy Satat
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Noise Analysis for Lensless Compressive Imaging [PDF]
Signal Processing: Image Communication, 2015 We analyze the signal to noise ratio (SNR) in a recently proposed lensless compressive imaging architecture. The architecture consists of a sensor of a single detector element and an aperture assembly of an array of aperture elements, each of which has a programmable transmittance.
Hong Jiang
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Lensless Imaging: A computational renaissance
IEEE Signal Processing Magazine, 2016The basic design of a camera has remained unchanged for centuries. To acquire an image, light from the scene under view is focused onto a photosensitive surface using a lens. Over the years, the photosensitive surface has evolved from a photographic film to an array of digital sensors.
Vivek Boominathan +7 more
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Applied Optics, 1980
A lensless scanning telescope composed of two circular apertures and having good response with minimum aliasing is described. By analogy with an arrangement of two slits, the modulation transfer function (MTF) of this telescope is derived. The MTF of a lensless telescope scanning the earth's surface from 500-km orbit is developed for both the scan and ...
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A lensless scanning telescope composed of two circular apertures and having good response with minimum aliasing is described. By analogy with an arrangement of two slits, the modulation transfer function (MTF) of this telescope is derived. The MTF of a lensless telescope scanning the earth's surface from 500-km orbit is developed for both the scan and ...
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Lensless ghost imaging with sunlight
Optics Letters, 2014An experiment demonstrating lensless ghost imaging (GI) with sunlight has been performed. A narrow spectral line is first filtered out and its intensity correlation measured. With this true thermal light source, an object consisting of two holes is imaged.
Xue-Feng, Liu +5 more
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Depth-resolved Lensless Imaging
Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018A numerical approach is developed to reconstruct 3D images from a set of wavelengthand phase-resolved diffraction patterns, resulting in a computational depth-resolved imaging method.
Du, M., Eikema, K. S.E., Witte, S.
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Lensless stereo microscopic imaging
ACM SIGGRAPH 2007 emerging technologies, 2007A simple inexpensive high-contrast stereo microscopic is constructed from a single video imager sensor. Two field-synchronous LEDs illuminate the subject creating disparity. The stereo microscope outputs standard field-sequential 3D video and is compatible with commercial head mounted displays and LCD shutter glasses.
Thomas G. Zimmerman, Barton A. Smith
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Optik, 2013 Lensless ghost imaging with thermal light through turbulent atmosphere is investigated. Based on the extended Huygens-Fresnel integral and the classical optical coherence theory, we derive the expressions for the visibility and signal-to-noise ratio (SNR)
Wan, Ren-Gang +3 more
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Lensless imaging of an arbitrary object
Optics Letters, 2003A new class of imaging systems that do not require the use of lenses or similar optical devices is introduced and theoretically investigated. In particular, it is demonstrated that, if an arbitrary plane object is illuminated by an appropriate spherical wave front (generated from a monochromatic point source), then a magnified image of the object ...
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Applied Optics, 1977
By hacksawing a Polaroid Super Shooter instant camera in two, a device can be made that solves the problem of recording real images (images that can be shown on a screen) for rapid evaluation in a laboratory. The real-image camera described here provides students, whose laboratory time is at a premium, with instant records of their work in an optics ...
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By hacksawing a Polaroid Super Shooter instant camera in two, a device can be made that solves the problem of recording real images (images that can be shown on a screen) for rapid evaluation in a laboratory. The real-image camera described here provides students, whose laboratory time is at a premium, with instant records of their work in an optics ...
openaire +2 more sources