公开(公告)号：US11733175B2

公开(公告)日：2023-08-22

申请号：US17489300

申请日：2021-09-29

Applicant: University of Electronic Science and Technology of China

Inventor： Yunping Chen ,  Yue Yang ,  Yan Chen

IPC: G01N21/94 ,  G01N21/3504

CPC classification number: G01N21/94 ,  G01N21/3504

Abstract: Embodiments include a method for retrieving atmospheric aerosol based on statistical segmentation. Firstly a multi-band remote sensing image including an apparent reflectance and an aerosol optical thickness look-up table corresponding to a retrieval band is obtained, then pixels are partitioned and screened according to apparent reflectance segments of a mid-infrared 2.1 micrometer band. After that the retained pixel sets are further partitioned and screened according to the apparent reflectance segments of the mid-infrared 1.6 micrometer band. Finally the obtained pixel sets are partitioned into two categories according to the pixel number, one category including pixels having more pixels, the other including those with less pixels. The category with more pixels is taken as the reference part for retrieval.

公开(公告)号：US20220018787A1

公开(公告)日：2022-01-20

申请号：US17489300

申请日：2021-09-29

Applicant: University of Electronic Science and Technology of China

Inventor： Yunping Chen ,  Yue Yang ,  Yan Chen

IPC: G01N21/94 ,  G01N21/3504

Abstract: Embodiments include a method for retrieving atmospheric aerosol based on statistical segmentation. Firstly a multi-band remote sensing image including an apparent reflectance and an aerosol optical thickness look-up table corresponding to a retrieval band is obtained, then pixels are partitioned and screened according to apparent reflectance segments of a mid-infrared 2.1 micrometer band. After that the retained pixel sets are further partitioned and screened according to the apparent reflectance segments of the mid-infrared 1.6 micrometer band. Finally the obtained pixel sets are partitioned into two categories according to the pixel number, one category including pixels having more pixels, the other including those with less pixels. The category with more pixels is taken as the reference part for retrieval.

公开(公告)号：US20210318253A1

公开(公告)日：2021-10-14

申请号：US16885021

申请日：2020-05-27

Applicant: University of Electronic Science and Technology of China

Inventor： Yunping Chen ,  Yue Yang ,  Yan Chen

IPC: G01N21/94 ,  G01N21/3504

Abstract: Embodiments include a method for retrieving atmospheric aerosol based on statistical segmentation. Firstly a multi-band remote sensing image including an apparent reflectance and an aerosol optical thickness look-up table corresponding to a retrieval band is obtained, then pixels are partitioned and screened according to apparent reflectance segments of a mid-infrared 2.1 micrometer band. After that the retained pixel sets are further partitioned and screened according to the apparent reflectance segments of the mid-infrared 1.6 micrometer band. Finally the obtained pixel sets are partitioned into two categories according to the pixel number, one category including pixels having more pixels, the other including those with less pixels. The category with more pixels is taken as the reference part for retrieval.

公开(公告)号：US10705205B2

公开(公告)日：2020-07-07

申请号：US16012791

申请日：2018-06-20

Applicant: University of Electronic Science and Technology of China

Inventor： Qun Wan ,  Yue Yang ,  Zhenzhu Zha ,  Jihao Yin ,  Lin Zou ,  Jie Zhuang ,  Xinyu Chen

IPC: G01S13/90 ,  G01S7/35

Abstract: The present invention relates to the technical field of synthetic aperture radar, and in particular to a ground-based interference synthetic aperture radar-based atmospheric phase compensation method. The present invention first uses the inverse fast Fourier transform algorithm to rapidly and effectively realize the focusing in the range and cross-range dimension. Then a triple threshold method which combines coherence coefficient, amplitude, and amplitude dispersion index is used to select reliable PS points. Finally, under a full consideration of the spatial correlation of the atmospheric phase, the atmospheric phase is estimated by using a two-dimensional-polynomial model. The present invention can rapidly and accurately estimate and compensate the atmospheric phase, is helpful in improving the accuracy of GB-InSAR real-time measurement, and valuable and universal in practical application.