Supercharge Your Innovation With Domain-Expert AI Agents!

A Hyperspectral Image Non-uniformity Correction Method

A non-uniformity correction and hyperspectral image technology, applied in spectrometry/spectrophotometry/monochromator, radiation pyrometry, spectrum investigation, etc., to solve the problem of non-uniformity correction and retain information Effect

Active Publication Date: 2020-11-20
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a non-uniformity correction method that solves the problem of image non-uniformity correction caused by invalid calibration coefficients

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
  • A Hyperspectral Image Non-uniformity Correction Method
  • A Hyperspectral Image Non-uniformity Correction Method
  • A Hyperspectral Image Non-uniformity Correction Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The following combination figure 1 — figure 2 The non-uniformity correction method will be described in detail.

[0022] (1) Acquire the flight data of a single imaging spectrometer. The detector size of the imaging spectrometer is 1024×256, the spatial dimension is 1024, and the spectral dimension is 256. The image size of a single route is about 100,000 frames. Data preprocessing is performed, and all data Subtract the dark current to obtain the image data set and denote it as D n (i, j), D n (i, j) represents the image gray value of the i-th column, j-th row, and n-th frame of the detector, 0≤i figure 2 as shown in (a);

[0023] (2) carry out distribution statistics to the gray value of the image collected by each probe;

[0024] (2-1) Statistics of the maximum value Max(i,j), minimum value Min(i,j) and dynamic range Rag(i,j) of all collected gray values ​​of each detector, Rag(i,j)= Max(i,j)-Min(i,j)+1;

[0025] (2-2) Statize the cumulative histogram of each ...

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

The invention discloses a non-uniformity correction method for a hyperspectral image. The method comprises the following steps: acquiring data of an imaging spectrometer and preprocessing the data; carrying out distribution statistics on the data; generating a radiation correction coefficient by utilizing the data at different distribution positions; and finally completing the non-uniformity correction of the hyperspectral image. Therefore, a problem of image non-uniformity correction caused by lack of non-uniformity correction coefficients or coefficient failure can be solved; the method basically does not cause loss of image information and thus plays an important role in imager calibration and data preprocessing.

Description

technical field [0001] The invention belongs to the field of data processing of remote sensing detection and imaging spectrometers, and in particular relates to a method for correcting non-uniformity of hyperspectral images. Background technique [0002] Due to the change of the detector's own material, process and environment, there are differences in the response value of the detector for uniform radiation or reflection signals, and the non-uniformity seriously affects the image quality and application effect of the imaging spectrometer. Therefore, non-uniformity is a necessary part of image processing. [0003] Non-uniformity correction methods include laboratory-based calibration, image filtering and image-based statistical matching methods. Laboratory calibration methods can achieve high accuracy, but due to insufficient laboratory calibration and detectors affected by the environment, etc. The calibration coefficient is invalid, and it is difficult to correct the non-...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28G01J3/02
CPCG01J3/0297G01J3/2823
Inventor 张长兴王跃明张东何道刚王建宇
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com