Aim to optimize an effective autofocus algorithm for processing of airborne SAR images.
目的为了选用快速高效的自聚焦算法对机载SAR数据进行聚焦处理。
The imaging results based on the measured ISAR data demonstrate a good performance of the autofocus algorithm.
将该算法应用于实测数据的ISAR成像中，得到了较好的聚焦结果。
Synthetic aperture radar imaging algorithm and radar imaging autofocus algorithm are mainly discussed in this thesis.
本文主要研究了合成孔径雷达成像算法和雷达成像自聚焦算法两个方面的内容。
Autofocus algorithm consists of three modules: focus region selection, focus measurement function and peak searching algorithm.
自动聚焦算法包括三个模块：聚焦区域选择、聚焦评价函数和极点搜索算法。
The autofocus algorithm not only need enough precision and computational efficiency, but also need fitting low signal to clutter rate (SCR).
自聚焦除了要有足够高的精度和高计算效率外，还要求能够适应信杂比较低的情况。
Considering the image contrast as a measurement of the degree of the image focus, a novel autofocus algorithm for Synthetic Aperture Radar (SAR) imagery is presented in this paper.
以对比度作为衡量图像聚焦程度的标准，研究了一种新颖的SAR图像自聚焦算法。
Compared with the PGA autofocus algorithm, the minimum entropy algorithm needs not isolate prominent point target in image domain and is especially suitable for the images without specific ch...
同相位梯度自聚焦算法相比，最小熵算法无需在图像域分离出强点目标，因而特别适用于无任何明显特征的图像。
Reflectivity Displacement Method (RDM) is a classical algorithm of Synthetic Aperture Radar (SAR) autofocus processing, whose performance degenerates with low contrast of the scene.
反射率偏移法（RDM）是合成孔径雷达（SAR）自聚焦的经典算法，当场景对比度较低时，RDM自聚焦效果变差。
Of the existing phase compensation methods, the phase gradient autofocus (PGA) algorithm is a better one.
在现有的相位补偿方法中，相位梯度自聚焦（PGA）算法是较好的一种。
The autofocus method in this paper has three characters: using a simple calculation of focal blur to reduce the complexity of the algorithm;
本文所用方法有三方面的优势：第一，对于屏幕模糊图像的获取运用一个简单的焦点模糊的计算方法，减小了处理的数据量；
The autofocus method in this paper has three characters: using a simple calculation of focal blur to reduce the complexity of the algorithm;
本文所用方法有三方面的优势：第一，对于屏幕模糊图像的获取运用一个简单的焦点模糊的计算方法，减小了处理的数据量；
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