A Highly Efficient Lucky Imaging Algorithm: Image Synthesis Based on Fourier Amplitude Selection
A Highly Efficient Lucky Imaging Algorithm: Image Synthesis Based on Fourier Amplitude Selection
复制标题
DOI：
10.1086/667399
复制
发表时间：
2012-08
影响因子：
3.5
通讯作者：
V. Garrel;O. Guyon;P. Baudoz
中科院分区：
文献类型：
--
作者：
V. Garrel;O. Guyon;P. Baudoz
我们提出了一种新的算法，大大提高了在可见光范围内的AO校正图像的幸运成像技术的效率。这是通过基于傅立叶域中每个空间频率的信号的相对强度进行选择来实现的，从而更有效地利用每个帧中包含的信息。现实的模拟表明，我们的算法使我们能够达到衍射极限在可见光范围内的AO配备8米望远镜，并提高了斯特雷尔比AO长曝光的一个因素高达4。它优于幸运成像技术在相同的选择比。对于给定的Strehl比性能，模拟中所选数据的比例也从2倍提高到8倍。
We propose a new algorithm dramatically enhancing the efficiency of the lucky imaging technique for AO-corrected images in the visible range. It is achieved by a selection based on the relative strength of signal for each spatial frequency in the Fourier domain, making a more efficient use of information contained in each frame. Realistic simulations show that our algorithm allows us to reach the diffraction limit in the visible range on an AO-equipped 8 m telescope and enhances the Strehl ratio of an AO long exposure by a factor of up to 4. It outperforms the lucky imaging technique at an equivalent selection ratio. The fraction of selected data in simulation is also boosted from two to eight times for a given Strehl-ratio performance.