IMAGE RECOVERY FROM DATA ACQUIRED WITH A CHARGE-COUPLED-DEVICE CAMERA
IMAGE RECOVERY FROM DATA ACQUIRED WITH A CHARGE-COUPLED-DEVICE CAMERA
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DOI：
10.1364/josaa.10.001014
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发表时间：
1993-05-01
影响因子：
1.9
通讯作者：
WHITE, RL
中科院分区：
文献类型：
--
作者：
SNYDER, DL;HAMMOUD, AM;WHITE, RL
给出了一个使用电荷耦合器件相机获取数据的模型，然后利用该模型开发了一种新的迭代方法，用于恢复用这种相机观测到的物体的强度。该模型包括点扩散、光电转换噪声、读出噪声、不均匀平场响应、不均匀光谱响应以及由偏置、暗电流以及内部和外部背景辐射产生的外来电荷载流子的影响。确定了一种迭代算法，该算法产生一系列估计值，收敛于成像物体强度分布的受限最大似然估计。给出了一个从使用哈勃太空望远镜获取的数据中恢复图像的示例。
A model for data acquired with the use of a charge-coupled-device camera is given and is then used for developing a new iterative method for restoring intensities of objects observed with such a camera. The model includes the effects of point spread, photoconversion noise, readout noise, nonuniform flat-field response, nonuniform spectral response, and extraneous charge carriers resulting from bias, dark current, and both internal and external background radiation. An iterative algorithm is identified that produces a sequence of estimates converging toward a constrained maximum-likelihood estimate of the intensity distribution of an imaged object. An example is given for restoring images from data acquired with the use of the Hubble Space Telescope.