CN-122023199-A - Remote sensing imaging method based on wide-tolerance optical system and remote sensing imaging load

CN122023199ACN 122023199 ACN122023199 ACN 122023199ACN-122023199-A

Abstract

The embodiment of the invention provides a remote sensing imaging method based on a wide-tolerance optical system and a remote sensing imaging load. The method comprises the steps of obtaining an original remote sensing image collected by a wide tolerance optical system in a remote sensing imaging load, determining working conditions when the original remote sensing image is collected by the wide tolerance optical system, determining an image degradation model of the wide tolerance optical system according to the working conditions, wherein the image degradation model is used for representing the difference between an imaging result and an ideal imaging result of the wide tolerance optical system under the working conditions, and repairing the original remote sensing image based on the image degradation model to obtain a target remote sensing image. The engineering effectiveness of imaging quality under the condition of wide optical processing precision can be improved.

Inventors

SHAO XIAOPENG
WEI SHIJIE
WU TENGFEI
CHEN YUTONG
ZHANG YINUO

Assignees

中国科学院西安光学精密机械研究所

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. A method of remote sensing imaging based on a wide tolerance optical system, the method comprising: acquiring an original remote sensing image acquired by a wide tolerance optical system in a remote sensing imaging load; Determining working conditions when the original remote sensing image is acquired by the wide tolerance optical system; Determining an image degradation model of the wide-tolerance optical system according to the working condition, wherein the image degradation model is used for representing the difference between an imaging result and an ideal imaging result of the wide-tolerance optical system under the working condition; And repairing the original remote sensing image based on the image degradation model to obtain a target remote sensing image.
2. The method of claim 1, wherein said determining an image degradation model of said wide tolerance optical system based on said operating conditions comprises: Determining the blur characteristic, noise distribution and spatial variation rule of the wide tolerance optical system introduced in the imaging process under the working condition; An image degradation model representing the blur feature, noise distribution and spatial variation law is generated.
3. A remote sensing imaging load based on a wide tolerance optical system, which is characterized by comprising the wide tolerance optical system and a digital compensation module; the machining precision of the lens surface type in the wide tolerance optical system is wider than lambda/50, and the wide tolerance optical system is used for collecting optical signals emitted by the earth surface to obtain an original remote sensing image, wherein lambda is the wavelength of the optical signals; the digital compensation module is used for generating a target remote sensing image according to the remote sensing imaging method based on the wide-tolerance optical system as set forth in any one of claims 1-2.
4. The remotely imaged load of claim 3, wherein the wide tolerance optical system comprises n lenses and photodetectors, n being less than a preset number threshold; The n lenses are sequentially arranged from the object space to the image space and are used for focusing optical signals emitted by the ground surface to the photoelectric detector; The photoelectric detector is arranged on the image surface of the wide-tolerance optical system and is used for sensing an incident optical signal to generate an original remote sensing image.
5. The remote sensing imaging payload of claim 4, wherein at least one of the lenses is a spherical lens or a low order aspheric lens.
6. The remotely imaged load of claim 3, wherein the wide tolerance optical system comprises at least one pair of mirrors and photodetectors; each pair of reflectors are sequentially arranged from the object side to the image side, and each pair of reflectors are used for mutually matching to focus optical signals emitted by the ground surface to the photoelectric detector; The photoelectric detector is arranged on the image surface of the wide-tolerance optical system and is used for sensing an incident optical signal to generate an original remote sensing image.
7. The remotely imaged load of claim 6, wherein the wide tolerance optical system further comprises at least one of the following optical elements: a first optical element for performing optical path folding on the optical signal; a second optical element for aberration correcting the optical signal; and a third optical element for shortening the optical path of the optical signal.
8. A remote sensing imaging apparatus based on a wide tolerance optical system, the apparatus comprising: the optical acquisition module is used for acquiring an original remote sensing image acquired by the wide-tolerance optical system in the remote sensing imaging load; The working condition acquisition module is used for determining working condition when the original remote sensing image is acquired by the wide tolerance optical system; A degradation model module, configured to determine an image degradation model of the wide tolerance optical system according to the working condition, where the image degradation model is used to represent a difference between an imaging result of the wide tolerance optical system under the working condition and an ideal imaging result; and the image restoration module is used for restoring the original remote sensing image based on the image degradation model to obtain a target remote sensing image.
9. The apparatus of claim 8, wherein the degradation model module determines an image degradation model of the wide tolerance optical system based on the operating conditions, comprising: Determining the blur characteristic, noise distribution and spatial variation rule of the wide tolerance optical system introduced in the imaging process under the working condition; An image degradation model representing the blur feature, noise distribution and spatial variation law is generated.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-2.

Description

Remote sensing imaging method based on wide-tolerance optical system and remote sensing imaging load Technical Field The invention relates to the technical field of remote sensing imaging, in particular to a remote sensing imaging method based on a wide-tolerance optical system and a remote sensing imaging load. Background The remote sensing imaging system is used as an important technical means of earth observation, resource monitoring and environment sensing, and has high requirements on imaging quality for a long time. In order to obtain higher spatial resolution, signal-to-noise ratio and good modulation transfer characteristics, the existing remote sensing imaging system generally depends on optical imaging load with higher processing precision, and the optical system of the existing remote sensing imaging system mostly adopts a multi-lens combined structure, an aspheric surface or a free-form surface optical element, and realizes full correction of various aberrations through strict processing and adjustment processes. In engineering implementation, the optical system often has higher requirements on the surface shape precision, assembly tolerance and detection condition of the lens, so that the manufacturing process is complex and the development period is longer. However, as remote sensing applications evolve toward low orbit satellites, miniaturized platforms, and constellation deployment, conventional imaging systems with high optical processing accuracy as a core gradually expose the problem of inadequate engineering suitability. On one hand, the investment of the high-precision optical system in the aspects of manufacturing cost, processing period and adjustment complexity is continuously increased, the practical requirements of large-scale and low-cost deployment are difficult to meet, and on the other hand, the increase of volume and weight caused by the complex optical structure also forms restrictions on the light weight and standardized design of the satellite platform. In addition, in the actual on-orbit running process, the optical system is inevitably influenced by factors such as emission vibration, thermal environment change, long-term service aging and the like, and even if the high-precision index is met under the ground condition, the imaging performance of the optical system can shift in the service period, so that the engineering effectiveness of guaranteeing the imaging quality by simply relying on optical processing precision is weakened. Disclosure of Invention The embodiment of the invention aims to provide a remote sensing imaging method and a remote sensing imaging load based on a wide-tolerance optical system so as to improve engineering effectiveness of imaging quality under the condition of wide optical processing precision. The specific technical scheme is as follows: in a first aspect of the present application, there is provided a remote sensing imaging method based on a wide tolerance optical system, the method comprising: acquiring an original remote sensing image acquired by a wide tolerance optical system in a remote sensing imaging load; Determining working conditions when the original remote sensing image is acquired by the wide tolerance optical system; Determining an image degradation model of the wide-tolerance optical system according to the working condition, wherein the image degradation model is used for representing the difference between an imaging result and an ideal imaging result of the wide-tolerance optical system under the working condition; And repairing the original remote sensing image based on the image degradation model to obtain a target remote sensing image. In one possible embodiment, the determining the image degradation model of the wide tolerance optical system according to the working condition includes: Determining the blur characteristic, noise distribution and spatial variation rule of the wide tolerance optical system introduced in the imaging process under the working condition; An image degradation model representing the blur feature, noise distribution and spatial variation law is generated. In a second aspect of the application, there is provided a remote sensing imaging load based on a wide tolerance optical system, the remote sensing imaging load comprising a wide tolerance optical system and a digital compensation module; the machining precision of the lens surface type in the wide tolerance optical system is wider than lambda/50, and the wide tolerance optical system is used for collecting optical signals emitted by the earth surface to obtain an original remote sensing image, wherein lambda is the wavelength of the optical signals; The digital compensation module is configured to generate a target remote sensing image according to the remote sensing imaging method based on the wide tolerance optical system in any one of the first aspect. In one possible embodiment, the wide tolerance optical system includes n lenses and pho