One-step harmonic single-pixel imaging method

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.