EM algorithm什么意思

EM 演算法在影像处理之应用
内容简介

The EM (Expectation-Maximization) algorithm is a broadly applicable method for calculating maximum likelihood estimates given incomplete data. EM algorithm has received considerable attention due to their computation feasibility in tomographic image reconstruction, and parameter estimation. However, it is less recognized that EM algorithm can be equally applicable to image enhancement applications encountered in scanning, reproduction and rendering processes. No past techniques surveyed can incorporate the potentially complex nature of various image formation processes into a simple probability density array as EM procedure does. In this project, an image processing method utilizing EM procedure is proposed. By dynamically giving a priori probability distribution suited for a specific application environment currently considered, the proposed method provides a general framework for rendering good image quality at the designated resolution for a l