Systems and Methods for Lensless Image Acquisition

摘要

Image-sensing devices include odd-symmetry gratings that cast interference patterns over a photodetector array. Grating features offer considerable insensitivity to the wavelength of incident light, and also to the manufactured distance between the grating and the photodetector array. Photographs and other image information can be extracted from interference patterns captured by the photodetector array. Efficient extraction algorithms based on Fourier deconvolution introduce barrel distortion, which can be removed by resampling using correction functions.

主权项

1. A method of imaging a scene, the method comprising:
storing a deconvolution kernel associated with a point-spread function of a diffraction grating; passing light from the scene through the diffraction grating to produce a diffraction pattern; sampling the diffraction pattern with a sensor array to obtain a digital sample of the diffraction pattern; constructing a distorted image of the scene from the digital sample; and resampling the distorted image of the scene to obtain a reduced-distortion image of the scene.