IMU-Assisted Accurate Blur Kernel Re-Estimation in Non-Uniform Camera Shake Deblurring

Image deblurring for camera shake is a highly regarded problem in the field of computer vision. A promising solution is the patch-wise non-uniform image deblurring algorithms, where a linear transformation model is typically established between different blur kernels to re-estimate poorly estimated blur kernels. However, the linear model struggles to effectively describe the nonlinear transformation relationships between blur kernels. A key observation is that the inertial measurement unit (IMU) provides motion data of the camera, which is helpful in describing the landmarks of the blur kernel. This paper presents a new IMU-assisted method for the re-estimation of poorly estimated blur kernels. This method establishes a nonlinear transformation relationship model between blur kernels of different patches using IMU motion data. Subsequently, an optimization problem is applied to re-estimate poorly estimated blur kernels by incorporating this relationship model with neighboring well-estimated kernels. Experimental results demonstrate that this blur kernel re-estimation method outperforms existing methods.