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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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Lensless Mismatched Aspect Ratio Imaging
2021 IEEE International Conference on Computational Photography (ICCP), 2021In photography, as in other imaging areas, the aspect ratio of a picture is dictated by the aspect ratio of an image sensor. In this paper, we present a flexible and efficient lensless approach to overcome aspect ratio dependency. We introduce a theory of coded aperture imaging when the aspect ratio of the scene is mismatched with the aspect ratio of ...
Ilya Reshetouski +4 more
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Coded Illumination and Multiplexing for Lensless Imaging
ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020Mask-based lensless cameras offer an alternative option to conventional cameras. Compared to conventional cameras, lensless cameras can be extremely thin, flexible, and lightweight. Despite these advantages, the quality of images recovered from the lensless cameras is often poor because of the ill-conditioning of the underlying linear system.
Yucheng Zheng +2 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 ...
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Imaging Systems, 2010
Coherent imaging has numerous advantages over incoherent imaging, but at a cost of requiring coherent laser illumination.
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Coherent imaging has numerous advantages over incoherent imaging, but at a cost of requiring coherent laser illumination.
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Imaging with Distributed Lensless Line Sensors
2019 53rd Asilomar Conference on Signals, Systems, and Computers, 2019Recently, mask-based camera has been proposed by replacing the lens with a coded-mask that modulates light as it reaches the sensor. Such mask-based cameras can reliably capture both direction and depth information about the scene. However, current designs of lensless camera contain only one sensor array. In contrast to that, using multiple distributed
Yucheng Zheng, M. Salman Asif
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Mutual-intensity lensless imaging system
Optics Letters, 1993I describe a lensless imaging system in which the image is formed by the mutual-intensity function instead of by a conventional intensity distribution. Both theoretical and experimental results are given.
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2014
The achieved imaging results are presented and discussed in this chapter. Using digital in-line holography amplitude and phase-contrast imaging in the extreme ultraviolet on cell-like specimen is presented. This is followed by experiments on coherent diffraction imaging at the Abbe limit demonstrating unprecedented relative resolution.
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The achieved imaging results are presented and discussed in this chapter. Using digital in-line holography amplitude and phase-contrast imaging in the extreme ultraviolet on cell-like specimen is presented. This is followed by experiments on coherent diffraction imaging at the Abbe limit demonstrating unprecedented relative resolution.
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Molecular Imaging in Oncology: Current Impact and Future Directions
Ca-A Cancer Journal for Clinicians, 2022Martin G. Pomper, Steven P Rowe
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