Method and device for removing motion blur of image

Abstract

The invention discloses a method and a device for removing motion blur of an image. The method comprises: firstly, performing overlapped image block division on an input blurred image; selecting a group of reference image blocks from the blurred image for each overlapped image block; obtaining a series of preliminarily estimated blurred kernels for all reference image blocks corresponding to eachoverlapped image block by using an existing blurred kernel estimation method; obtaining a plurality of overlapped blurred image blocks, selecting a local optimal blurred kernel from the overlapped blurred image blocks by using an L0 sparsity blurred kernel quality measurement standard, finally performing non-blind deconvolution on the corresponding overlapped blurred image blocks by using each local optimal blurred kernel to obtain deblurred image blocks, and splicing the deblurred image blocks together to obtain a final deblurred image. When the motion blur of the image is removed, the continuously changing non-uniform motion blur can be effectively removed, and the ringing effect is reduced as much as possible.

Description

technical field

[0001] The invention relates to the technical field of digital image processing, in particular to an image motion blur removal method and device. Background technique

[0002] Image motion blur is caused by the relative motion of the camera and the scene being photographed during the exposure. With the popularity of smart phones, it has gradually become the most popular camera device today. Limited by the size limitation of the device itself and the design cost considerations, the aperture size of the mobile phone camera is very limited, and the area of ​​the photosensitive element per pixel of the image sensor is also very limited, which makes the light-sensing ability of the mobile phone camera relatively weak. To get enough photons per pixel, the camera needs to capture light for tens to hundreds of milliseconds. Therefore, when taking pictures with a mobile phone in hand, the problem of motion blur becomes particularly prominent. Image deblurring is to...

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