算法
趋同(经济学)
平滑的
迭代重建
一般化
数学
功能(生物学)
断层摄影术
图像(数学)
计算机科学
数学优化
人工智能
数学分析
物理
光学
统计
进化生物学
生物
经济增长
经济
出处
期刊:IEEE Transactions on Medical Imaging
[Institute of Electrical and Electronics Engineers]
日期:1990-01-01
卷期号:9 (4): 439-446
被引量:361
摘要
P.J. Green has defined an OSL (one-step late) algorithm that retains the E-step of the EM algorithm (for image reconstruction in emission tomography) but provides an approximate solution to the M-step. Further modifications of the OSL algorithm guarantee convergence to the unique maximum of the log posterior function. Convergence is proved under a specific set of sufficient conditions. Several of these conditions concern the potential function of the Gibb's prior, and a number of candidate potential functions are identified. Generalization of the OSL algorithm to transmission tomography is also considered.
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