One-step harmonic single-pixel imaging method

Abstract

The invention relates to the technical field of single-pixel calculation imaging, in particular to a one-step harmonic single-pixel imaging method. The single-pixel imaging method specifically comprises the following steps that: a computer performs imaging according to a formula P (x, y; a series of illumination patterns is generated with different spatial frequencies and a phase of pi / 4 accordingto a formula that f < x >, f < y > = a + bsin (2pi < x > + 2pi < y > + pi / 4); projection equipment projects the generated illumination patterns to a target object, and the target object sends out anoptical signal; photoelectric conversion equipment converts an optical signal into an electric signal, and the electric signal is recorded and stored by the signal acquisition equipment; the electricsignal stored in the signal acquisition equipment is transmitted to the computer, and a computer calculates and obtains reconstructed image information of the target object according to a Hartley inverse transformation formula. According to the one-step harmonic single-pixel imaging method, no phase shift is needed, no auxiliary illumination pattern is needed, an image can be recovered only through the illumination pattern with one phase, the number of the required illumination patterns is reduced, only a real number is used for operation, and the single-pixel harmonic calculation imaging efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of single-pixel computational imaging, in particular to a one-step harmonic single-pixel imaging method. technical background [0002] Single-pixel imaging is a computational imaging technology, which reconstructs a target scene based on the correlation between a large number of illumination patterns and reflected modulation signals of the scene. This method has obvious advantages such as wide band and low cost. Because of these advantages, single-pixel imaging has been applied to many fields, including three-dimensional imaging, terahertz imaging, multi-spectral imaging and polarization imaging. Single-pixel imaging needs to use a large number of illumination patterns to modulate the object to be imaged to obtain the modulated optical signal, and then calculate the information of the image. Illumination patterns are a series of images generated by a computer and containing coded information. Generally, the light...

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Problems solved by technology

[0003] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a one-step harmonic single-pixel imaging method, which can efficiently realize single-pixel computational imaging by utilizing the properties of the Hartley transform and using a small number of illumination patterns. Can overcome the problem of the huge number of illumination patterns required by existing single-pixel imaging methods

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