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

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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Problems solved by technology

However, Fourier ghost imaging is slower because the instrument generates sinusoidal signals much slower than binary signals

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