By using active set strategy, the authors need only to solve a reduced trust region subproblem which is solved inexactly by the truncated conjugate gradient method. 作者利用有效集策略,在每次迭代中只需求解一个低维的信赖域子问题,该信赖域子问题是通过截断共轭梯度法来近似求解的。
The Results by using Pick-pick Signal Noise Ratio ( PSNR) or mean square error ( mse) are different from by subjective psychological assessment, while the latter are usually inexactly and have subjectivity. 通常使用的峰-峰信噪比或均方误差与主观感觉并不相符,而主观评价又存在主观性和不确定性,其结果往往因人而异。
In our common use of the noise level estimating method, the influence of pixels on the edge has not been considered, which mades the estimated value inexactly. 目前,我们常用的噪音强度估计方法中,没有考虑边缘像素点的影响,使估计值不很准确。
Multiplicative Schwarz Algorithm for Inexactly Solving Subproblems 近似求解子问题的乘性Schwarz算法
We propose two classes of inexact direction methods and allow to inexactly solving the two sub-problems. 提出了两类非精确交替方向法。
The outer iteration of this method is the classical Newton method, and the inner iteration is using GMRES to solve Jacobi equations inexactly. 该方法的外迭代为经典牛顿法,内迭代为用GMRES法不精确求解雅可比方程。