Fast Fourier ghost imaging method and system based on frequency domain modulation

A technology of ghost imaging and frequency domain, which is applied in the field of fast Fourier ghost imaging method and system, can solve the problems of slow Fourier ghost imaging speed, and achieve the effect of improving practicability and reliability

Active Publication Date: 2017-03-22
TSINGHUA UNIV
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However, Fourier ghost imaging is slower because the instrumen

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  • Fast Fourier ghost imaging method and system based on frequency domain modulation
  • Fast Fourier ghost imaging method and system based on frequency domain modulation
  • Fast Fourier ghost imaging method and system based on frequency domain modulation

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[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] The Fourier ghost imaging method and system based on frequency domain modulation according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the Fourier ghost imaging method based on frequency domain modulation according to the embodiments of the present invention will be described with reference to the accompanying drawings.

[0033] figure 1 It is a flowchart of a Fourier ghost imaging method based on frequency domain modulation according to an embodim...

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Abstract

The invention discloses a fast Fourier ghost imaging method and system based on frequency domain modulation. The method comprises the steps of obtaining binary fringes through the frequency domain modulation, thereby generating gray fringes according to the binary fringes; collecting amplitude and phase of image spectrum through the gray fringes; restoring spectrum according to the amplitude and phase of the image spectrum; and obtaining an imaged image through Fourier inverse transform. According to the imaging method, the Fourier ghost imaging speed can be improved through a frequency domain modulation method, thereby realizing high-precise ghost imaging fast and improving the imaging practicability.

Description

technical field [0001] The invention relates to the technical field of computational photography, in particular to a fast Fourier ghost imaging method and system based on frequency domain modulation. Background technique [0002] In related technologies, Fourier ghost imaging restores the spectrum by directly collecting the amplitude and phase of the image spectrum, and then obtains the image through Fourier inverse transform. Fourier ghost imaging is different from traditional single-pixel imaging in that this work uses a modulation pattern of a 4-step phase-shifted sinusoidal signal to complete the acquisition of the Fourier spectrum of the imaging scene, rather than using a random pattern to complete the imaging in the traditional sense process. Since the same sinusoidal signal has the same total intensity under different phase shifts, comparing the four different phase shifts with each other can remove ambient light noise whose frequency is much higher or far lower than...

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Application Information

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IPC IPC(8): G06T3/00
CPCG06T3/0093
Inventor 戴琼海张元龙王玉旺索津莉
Owner TSINGHUA UNIV
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