Browsing by Author "Ayremlou, Ali"

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    FlatCam: Lensless Imaging, Principles, Applications and Fabrication
    (2015-12-03) Ayremlou, Ali; Baraniuk, Richard G
    FlatCam is a thin form-factor camera that consists of a coded mask placed on top of a bare, conventional sensor array. The design is inspired by coded aperture imaging principles; each sensor pixel records a linear combination of the scene in front of the camera, and a computational algorithm reconstructs the image. A key design feature of the FlatCam is its slim form-factor, which enables imaging using extremely thin, even flexible surfaces that operate over a wide spectral range and are amenable to monolithic fabrication. We demonstrate the potential of the FlatCam design using two prototypes: one at visible wavelengths and one at infrared wavelengths.
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    Lensless imaging system using an image sensor with one or more attenuating layers
    (2021-11-16) Sankaranarayanan, Aswin; Veeraraghavan, Ashok; Hendricks, Lisa A.; Baraniuk, Richard; Ayremlou, Ali; Asif, Salman M.; Rice University; United States Patent and Trademark Office
    A lens-free imaging system for generating an image of a scene includes an electromagnetic (EM) radiation sensor; a mask disposed between the EM radiation sensor and the scene; an image processor that obtains signals from the EM radiation sensor while the EM radiation sensor is exposed to the scene; and estimates the image of the scene based on, at least in part, the signals and a transfer function between the scene and the EM radiation sensor.