IEEE Transactions on Pattern Analysis and Machine Intelligence
International Journal of Computer Vision
Markov random field modeling in image analysis
Markov random field modeling in image analysis
Bayesian Reconstruction for Emissiom Tomography via Deterministic Annealing
IPMI '93 Proceedings of the 13th International Conference on Information Processing in Medical Imaging
Combined diagonal/Fourier preconditioning methods for image reconstruction in emission tomography
ICIP '95 Proceedings of the 1995 International Conference on Image Processing (Vol.2)-Volume 2 - Volume 2
A Non-Local Algorithm for Image Denoising
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 2 - Volume 02
Deterministic edge-preserving regularization in computed imaging
IEEE Transactions on Image Processing
Conjugate-gradient preconditioning methods for shift-variant PET image reconstruction
IEEE Transactions on Image Processing
Adaptively regularized constrained total least-squares image restoration
IEEE Transactions on Image Processing
Penalized maximum-likelihood image reconstruction using space-alternating generalized EM algorithms
IEEE Transactions on Image Processing
Generalized Gibbs priors based positron emission tomography reconstruction
Computers in Biology and Medicine
Generalised Nonlocal Image Smoothing
International Journal of Computer Vision
Effective image restorations using a novel spatial adaptive prior
EURASIP Journal on Advances in Signal Processing
Sparse angular CT reconstruction using non-local means based iterative-correction POCS
Computers in Biology and Medicine
Hi-index | 0.00 |
Bayesian approaches, or maximum a posteriori (MAP) methods, are effective in providing solutions to ill-posed problems in image reconstruction. Based on Bayesian theory, prior information of the target image is imposed on image reconstruction to suppress noise. Conventionally, the information in most of prior models comes from weighted differences between pixel intensities within a small local neighborhood. In this paper, we propose a novel nonlocal prior such that differences are computed over a broader neighborhoods of each pixel with weights depending on its similarity with respect to the other pixels. In such a way connectivity and continuity of the image is exploited. A two-step reconstruction algorithm using the nonlocal prior is developed. The proposed nonlocal prior Bayesian reconstruction algorithm has been applied to emission tomographic reconstructions using both computer simulated data and patient SPECT data. Compared to several existing reconstruction methods, our approach shows better performance in both lowering the noise and preserving the edges.