Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Push-scan type space camera image on-orbit real-time restoration method

An aerospace camera and push-broom technology, which is applied in the field of space optical remote sensing, can solve the problems of lack of real-time performance and limit the application of aerospace optical remote sensing, and achieve the effect of reducing performance requirements and design difficulties, improving imaging performance, and high practical value.

Inactive Publication Date: 2015-02-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing image restoration methods are all post-processing of remote sensing images, that is, sending remote sensing images captured by aerospace cameras to the ground and then performing restoration processing, which is not real-time, which greatly limits its application to aerospace optical remote sensing, especially Applications in the military field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Push-scan type space camera image on-orbit real-time restoration method
  • Push-scan type space camera image on-orbit real-time restoration method
  • Push-scan type space camera image on-orbit real-time restoration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Specific implementation examples

[0033] Taking the most typical linear filtering method—Wiener filtering method as an example, an example of the present invention combining this method to realize on-orbit real-time deconvolution and restoration of images is given:

[0034] Step 1: Use existing relatively mature methods (such as point light source method, inclined edge method, rectangular pulse method and radiation target method, etc., see relevant literature for details), or use an improved method for existing mature methods Estimate the point spread function. Get a more accurate on-orbit normalization h(x,y), such as image 3 shown.

[0035] Step 2: For the above formula (1): g(x,y)=h(x,y)*f(x,y)+n(x,y) shows that the degradation of the image in the space domain usually requires It is processed in the frequency domain, that is, the convolution in the space domain becomes the product in the frequency domain, and the Fourier transform is performed on both sides of (...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A push-scan type space camera image on-orbit real-time restoration method. The method is based on a relatively mature linear filtering method, components except for frequency domain information of an image to be restored in a frequency domain expression of the linear filtering restoration method are separately put forward and are converted to a spatial domain, a main part of energy distribution in the spatial domain is captured as a small-sized spatial domain deconvolution template, and in combination with an embedded hardware system, spatial domain convolution real-time restoration of ground scene information obtained by a camera is performed, thereby solving the problem of real-time restoration of a space camera image. By adoption of a space camera system provided by the invention, a degraded remote sensing image is no longer output, and a reconstructed image by estimation of restoration of a photographed scene is output.

Description

technical field [0001] The invention belongs to the technical field of space optical remote sensing, and in particular relates to a real-time restoration method of a push-broom space camera image on orbit. Background technique [0002] The linear push-broom space camera is currently the most widely used space camera, and its imaging principle is as follows: figure 1 shown. Let the ground scene captured by the aerospace camera be f(x, y), and the remote sensing image g(x, y) obtained after passing through the camera system can be expressed as: [0003] g(x,y)=h(x,y)*f(x,y)+n(x,y) (1) [0004] (1) In the formula, h(x, y) is the characteristic function of the aerospace camera system—the point spread function (PSF), n(x, y) is the noise, and * means convolution. The above formula shows that the remote sensing image obtained by the aerospace camera is not a true reproduction of the ground scene, but degenerates during the imaging process, resulting in a degraded image. [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06T5/00
Inventor 付天骄张立国郭玲玲任建岳李亚鹏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com