Block-iterative Richardson-Lucy methods for image deblurring

Image Deblurring Nam-Yong Lee ∗ Department of Applied Mathematics, Institute of Basic Sciences, Inje University, Gimhae, Gyeongnam 621-749, Korea Abstract In this paper, we extend the Richardson–Lucy (RL) method to block iterative versions, separated BI-RL and interlaced BI-RL, for image deblurring applications. We propose combining algorithms for separated BI-RL to form block artifact-free output images from separately deblurred block-images. For interlaced BI-RL to accelerate the iteration, we propose an interlaced block-iteration algorithm on down-sampled blocks of the observed image. Simulation studies show that separated BI-RL and interlaced BI-RL achieve desired goals in Gaussian and diagonal deblurrings.