ID 原文 译文
10314 分割实验结果表明,该改进模型不但提高了对初始轮廓位置的鲁棒性,而且在分割灰度不均匀的图像时也取得了令人满意的分割结果。 ‭Segmentation experiment results show that the improved model not only improves the robustness to initial contour position, and gray uneven image segmentation based on satisfactory separation results were obtained.
10315 合成孔径雷达(synthetic aperture radar,SAR)是相干成像系统,所以接收信号相位的正确性决定了SAR图像的聚焦质量。 Synthetic aperture radar (synthetic aperture radar, SAR) is a coherent imaging system, so the correctness of the received signal phase determines the quality of SAR image focusing.
10316 利用自聚焦算法对SAR图像进行相位误差函数的估计及补偿是获得高分辨率,高质量SAR图像的关键步骤之一。 Using autofocus algorithm of phase error in SAR image function estimation and compensation is to obtain high resolution, high quality SAR image of one of the key steps.
10317 其中,相位梯度自聚焦(phase gradient autofocus,PGA)算法运算量适中且鲁棒性好,被广泛应用于SAR自聚焦中。 Among them, the phase gradient autofocus (phase gradient autofocus, PGA) algorithm computational complexity is moderate and good robustness, and is widely used in SAR autofocus.
10318 然而,PGA算法基于相位误差梯度值进行加权平均估计,相位差分的过程会引起噪声的积累,因此该算法对原SAR图像在方位数据域的信噪比要求较高。 However, PGA algorithm based on phase error gradient value weighted average estimate, the process of phase difference can cause the accumulation of noise, so the algorithm of the original SAR image in azimuth data fields to demand higher SNR.P
10319 针对PGA算法存在问题,提出了基于多脉冲联合估计的相位误差自聚焦(phase error autofocus,PEA)算法。 roblems in view of the PGA algorithm, is proposed based on multiple pulse joint estimation of phase error self-focusing (phase error autofocus, PEA) algorithm.
10320 该算法采用了PGA算法的处理结构,并基于相位误差直接进行加权平均估计,可以在较低信噪比条件下正确实现SAR图像的自聚焦处理。 The algorithm adopts the processing structure of the PGA algorithm, and carries on the weighted average of the estimated directly based on the phase error, can under the condition of low SNR correct self focusing the SAR image processing.
10321 仿真实验以及实测数据处理结果对比均表明,PEA算法可以获得优于PGA算法的自聚焦性能,且实际算法执行时间更短,更有利于算法实时处理。 Simulation results and the measured data processing results show that both contrast PEA algorithm can obtain better than the self-focusing performance of PGA algorithm, and the actual algorithm execution time is shorter, more conducive to real-time processing algorithm.
10322 针对条带模式合成孔径雷达回波缺失数据,提出了一种利用压缩感知恢复缺失数据并成像的方法。 Missing for stripe pattern synthetic aperture radar echo data, this paper proposes a using compressed sensing restore the missing data and imaging methods.
10323 将条带数据分块为多个子孔径数据,对子孔径利用压缩感知恢复缺失数据并拼接得到条带数据,缩短了整个数据的恢复时间,推导了压缩感知处理的基矩阵和测量矩阵。 ‭Pair will strip data block multiple sub aperture, aperture using compression perception restore the missing data and get stripe data splicing, shortens the time of the recovery of the whole data compression is deduced from the sensory processing base matrix and measure matrix.