PDAF是目前AF的主流技术,相对于传统的Contrast AF(反差对焦),PDAF具有对焦速度快,拉伸幅度小的优点,下面来讲讲PDAF的工作原理和计算方法。 先来聊个有意思的话题,PDAF(Phase Detection Autofocus)相位检测对焦,为什么叫做相位检测? 看一个我们非常熟悉的函数,正弦函数和余弦函数, y = sin(x) y = cos(x) = sin...
And then,the strip phase gradient autofocus(PGA) algorithm is ameliorated. 首先建立了适合机载UWB SAR成像几何的相位误差模型,并分析了其特点;然后针对模型特点,对条带式相位梯度自聚焦算法作出改进,同时提出一种基于空不变因子估计的加权相位梯度自聚焦算法。 3. A new phase gradient autofocus(PGA) algorithm...
Phase Gradient Autofocus is one of the most popular autofocus algorithm. It estimates and compensates the phase error using the phase of isolated point target. But, in case of that RCS(Radar Cross Section) near the point target is large, the phase of the point target and neighboring region ...
Wachel, "A Simple Model for On-Sensor Phase-Detection Autofocusing Algorithm," J. Comput. Commun. 1, 11-17 (2013).P. Sliwinski and P. Wachel. A simple model for on-sensor phase-detection autofocus- ing algorithm. Journal of Computer and Communications, 1(6):11-17, November 2013....
Keywords: Fourier ptychography and single-photon detection etc. Bahram Javidi (University of Connecticut) Keywords: holography etc. Rongguang Liang (The University of Arizona) Keywords: phase imaging, phase unwrapping and biomedical imaging etc. Christopher Metzler (The University of Maryland) Keywords: ...
4) PGA algorithm 相位梯度自聚焦算法 1. Application of an improved PGA algorithm in SAR motion compensation; 相位梯度自聚焦算法在机载合成孔径雷达运动补偿中的应用 更多例句>> 5) gradient phase detection 梯度相位法 1. It combines Canny algorithm with gradient phase detection. 并结合医学图像的...
The Phase Gradient Autofocus(PGA) algorithm can remove the high order phase error effectively,which is of great significance to get high resolution images in real-time processing. While PGA usually needs iteration, which necessitates long working hours. In addition, the performances of the algorithm...
Phase autofocus algorithmPGA algorithmThe phase gradient autofocus algorithm (PGA) is widely used in radar imaging due to its ability to achieve high accuracy estimation of phase error. However, in inverse synthetic aperture radar (ISAR) imaging, the target usually occupies continuous range bins and...
Marek Kuzniak,Mateusz Malanowski.Implementation of the Phase Gradient Autofocus Algorithm for Spotlight SAR. Proceedings of SPIE the International Society for Optical Engineering . 2007Marek Kuzniak,Mateusz Malanowski.Implementation of the Phase Gradient Autofocus Algorithm for Spotlight SAR. Proceedings of ...
Wachel, "A Simple Model for On-Sensor Phase-Detection Autofocusing Algorithm," J. Comput. Commun. 1, 11-17 (2013).P. Sliwinski and P. Wachel. A simple model for on-sensor phase-detection autofocus- ing algorithm. Journal of Computer and Communications, 1(6):11-17, November 2013....