A method for obtaining high-resolution images based on micro-satellite object-space scanning technology

Abstract

The invention discloses a method for obtaining a high-resolution image based on a micro-satellite object scanning technique. The method comprises the steps of a first step, constructing an object scanning imaging system based on a micro-satellite platform; a second step, acquiring a sub-pixel displacement sequence image; a third step, performing registration on a plurality of acquired image frames by means of a Fourier transform method based on transform domain registration; and a fourth step, fusing the registered images by means of a sequence image fusion method based on wavelet transform, thereby reconstructing a high-resolution image frame. The method of the invention is based on the micro-satellite platform and an object scanning subpixel technique is used. The Fourier transform method based on transform domain registration and the sequence image fusion method based on wavelet transform are used for reconstructing a plurality of frames of low-resolution image sequence with subpixel displacement to a high-resolution image frame, thereby increasing a Nyquist frequency for effectively reducing spectrum overlapping of an imaging system, furthermore improving the imaging quality of the whole optical system and obtaining more abundant target information.

Description

technical field [0001] The invention belongs to the field of spaceflight remote sensing, and relates to a method for obtaining high-resolution images based on a microsatellite platform using object-space scanning sub-pixel technology. Background technique [0002] Since the 21st century, with the increasing demand for high-resolution remote sensing images in military and civilian applications such as military reconnaissance and land resource exploration, how to obtain high-resolution remote sensing images at low cost has become a research hotspot in the field of aerospace remote sensing. [0003] At present, the common ways to obtain high-resolution remote sensing images mainly include increasing the optical focal length of spaceborne cameras, reducing the altitude of satellite orbits, and reducing the size of a single pixel of the detector. Although these conventional methods of increasing the resolution of spaceborne cameras are very effective, there are still many problem...

AI Technical Summary

Problems solved by technology

[0004] 1. The development of a camera with a long focal length will increase the volume of remote sensing satellites;

[0005] 2. The processing difficulty of optical parts will also increase;

[0006] 3. Lowering the altitude of the satellite orbit will cause the width of the spaceborne camera to decrease accordingly;

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