A Large Field of View Scattering Imaging Method Based on Moving Speckle Light Source

Abstract

The invention discloses a large-field-of-view scattering imaging method based on a moving speckle light source. Imaging, the device includes a movable speckle light source and a camera sensor, wherein the incoherent light generated by the movable speckle light source passes through the target and the scattering medium in turn and is collected and imaged by the camera sensor; the parameters of the movable speckle light source and the camera sensor are set to Establish the corresponding relationship between the acquired image parameters and the movable speckle light source to achieve effective acquisition of multiple images; preprocess the multiple acquired images to construct an integrated intensity matrix; according to the integrated intensity matrix, use the autocorrelation operation The autocorrelation information of the target is extracted, and the spatial distribution information of the target is reconstructed by using the phase recovery algorithm. The large field of view scattering imaging method proposed by the present invention makes the field of view of the system no longer limited by the memory effect range.

Description

technical field [0001] The invention relates to the fields of computational vision and digital image processing, in particular to a large field of view scattering imaging method based on a moving speckle light source. Background technique [0002] Scattering media exist widely in nature, especially in deep-sea exploration, biological tissue observation and other fields. Due to the unknown and complex internal refractive index distribution of the scattering medium, it will change the propagation direction of the original light, which makes it very difficult to reconstruct the target behind the scattering layer. [0003] The existing scattering imaging methods through strong scattering medium mainly include the following four categories: wavefront shaping method, deconvolution method based on point spread function (PSF), scanning correlation imaging method, and single exposure correlation imaging method. Among them, the wavefront shaping method modulates the phase of the ligh...

AI Technical Summary

Problems solved by technology

Scanning correlation imaging and single-exposure correlation imaging can both use autocorrelation and phase recovery methods to achieve non-invasive reconstruction of simple targets within the range of memory effects, but their field of view is also limited Due to the memory effect, these two imaging methods must be used only when a certain object distance or the size of the object to be observed is satisfied, and cannot be applied to large field of view scattering imaging in complex and changeable situations

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