access icon free Cross-range scaling technique for ISAR images with affine projection matrix

For better using of the inverse synthetic aperture radar (ISAR) images, it is more desirable to estimate the rotational velocity (RV) for image cross-range scaling. To solve this problem, an algorithm based on affine projection matrix is proposed. This method consists of two parts. The first part is to transform the two sequenced sub-aperture images by affine matrix. The aim is to eliminate the negative effects caused by ‘scaled–stretched’ transformation between the two images. In the second part, the processed images are mapped into polar coordinates system. In polar coordinates, the rotational motion in ISAR image is converted into the translation in the angle dimension. The correlation coefficient is used to search the right RV which provides the maximum correlation between the two processed images. Finally, experimental results based on simulated and real ISAR data are used to prove the effectiveness and practicability of the proposed method.

Inspec keywords: synthetic aperture radar; image sequences; matrix algebra; image motion analysis; radar imaging

Other keywords: cross-range scaling technique; polar coordinate system; two-sequenced sub-aperture images; RV estimation; scaled-stretched transformation; ISAR images; image cross-range scaling; rotational velocity estimation; rotational motion; correlation coefficient; affine projection matrix; inverse synthetic aperture radar images

Subjects: Optical, image and video signal processing; Radar equipment, systems and applications; Algebra

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2016.1096
Loading

Related content

content/journals/10.1049/el.2016.1096
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading