implement paper A Bayesian Approach to Digital Matting 贝叶斯抠图 matlab code

贝叶斯优化组合方法选择：采用Black Litterman方法-Bayesian Optimal Portfolio Selection： the Black-Litterman Approach

用贝叶斯方法处理USPS数据库，可直接运行，数据库不再上传。运行时间有点长，主要是判别函数的原因。-USPS database using Bayesian approach, can be directly run, the database is no longer upload. Running time is a bit long, the main reason is the discriminant function.