Image enhancement method, model training method and device based on single-pixel imaging

The embodiment of the invention provides an image enhancement method and device based on single-pixel imaging and a model training method and device. The method comprises the steps that a sample image collected by a single-pixel imaging system is acquired; performing frequency domain conversion on the sample image to obtain a first frequency spectrum, and reconstructing the first frequency spectrum to obtain a reconstructed image; calling a quality improvement model to perform image enhancement on the reconstructed image to obtain a sample enhanced image; performing frequency domain conversion on the sample enhanced image to obtain a second frequency spectrum, determining target loss based on the difference between the first frequency spectrum and the second frequency spectrum, and training a quality improvement model according to the target loss; obtaining a to-be-enhanced image, and calling the trained quality improvement model to perform image enhancement on the to-be-enhanced image to obtain an enhanced i