Fresnel aperture-based lensless infrared image processing method, storage medium and terminal

The invention discloses a Fresnel aperture-based lensless infrared image processing method, a storage medium and a terminal. The method comprises following steps of: superposing original image data soas to virtualize a Fresnel aperture, so as to form Moire straight fringes, wherein a real Fresnel aperture and the virtual Fresnel aperture have identical parameter and are slightly different, and the original image data is obtained by irradiating infrared light emitted by a target object onto an infrared focal plane detector by the real Fresnel aperture; extracting a signal component of the Moire straight fringes by using a fringe phase scanning method so as to obtain information including amplitude and phase of the target object; and performing 2D Discrete Fourier transform and zero frequency point regulation, and reconstructing a target object image. According to the method, a Moire fringe-based fringe phase scanning method is adopted for reconstructing phase information of tested light, so that lensless infra