A multi-dimensional joint non-uniformity correction method for infrared imaging system

A non-uniformity correction and infrared imaging system technology, applied in the field of infrared imaging, can solve the problems of effective use, increased imaging system hardware overhead, and large computational load

Active Publication Date: 2019-12-31
KUNMING INST OF PHYSICS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of technology has a large amount of calculation, and usually needs to calculate dozens or even hundreds of frames of images, which greatly increases the hardware overhead of the imaging system; and will cause "ghosting" phenomenon, affecting the image quality
Therefore, the current scene-based correction has not been effectively used in practical engineering applications

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 multi-dimensional joint non-uniformity correction method for infrared imaging system
  • A multi-dimensional joint non-uniformity correction method for infrared imaging system
  • A multi-dimensional joint non-uniformity correction method for infrared imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as figure 2 As shown, the method for multi-dimensional joint non-uniformity correction in the embodiment of the present invention specifically includes the following steps:

[0071] (1) Collect 3 corrected images for the black body (as a reference radiation source for uniform radiation), including: setting the black body temperature to T H , set the integration time to t C , collect the first corrected image D(T H ,t C ); keep the blackbody temperature T H , set the integration time to t 0 (t 0 C ), the second corrected image D(T H ,t 0 ); reduce the blackbody temperature to T L , set the integration time to t C , collect the third corrected image D(T L ,t C ); the gray value of the pixel (i, j) in these three images is

[0072] D. i,j (T H ,t C ) = t C ×[G i,j ×L(T H )+B i,j ]+[V×A i,j +O i,j ] (11)

[0073] D. i,j (T H ,t 0 ) = t 0×[G i,j ×L(T H )+B i,j ]+[V×A i,j +O i,j ] (12)

[0074] D. i,j (T L ,t C ) = t C ×[G i,j ×L(T ...

Embodiment 2

[0103] Such as Figure 4 As shown, the method for multi-dimensional joint non-uniformity correction in the embodiment of the present invention specifically includes the following steps:

[0104] (1) Collect 3 corrected images for the black body (as a reference radiation source for uniform radiation), including: setting the black body temperature to T H , set the integration time to t C , collect the first corrected image D(T H ,t C ); keep the blackbody temperature T H , set the integration time to t 0 (t 0 C ), the second corrected image D(T H ,t 0 ); reduce the blackbody temperature to T L , set the integration time to t 0 , collect the third corrected image D(T L ,t 0 ); the gray value of the pixel (i, j) in these three images is

[0105] D. i,j (T H ,t C ) = t C ×[G i,j ×L(T H )+B i,j ]+[V×A i,j +O i,j ] (25)

[0106] D. i,j (T H ,t 0 ) = t 0 ×[G i,j ×L(T H )+B i,j ]+[V×A i,j +O i,j ] (26)

[0107] D. i,j (T L ,t 0 ) = t 0 ×[G i,j ×L(T ...

Embodiment 3

[0138] Such as Figure 6 As shown, the method for multi-dimensional joint non-uniformity correction in the embodiment of the present invention specifically includes the following steps:

[0139] (1) Collect 3 corrected images for the black body (as a reference radiation source for uniform radiation), including: setting the black body temperature to T L , set the integration time to t C , collect the first corrected image D(T L ,t C ); keep the blackbody temperature T L , set the integration time to t 0 (t 0 C ), the second corrected image D(T L ,t 0 ); Raise the blackbody temperature to T H , set the integration time to t C , collect the third corrected image D(T H ,t C ); the gray value of the pixel (i, j) in these three images is

[0140] D. i,j (T L ,t C ) = t C ×[G i,j ×L(T L )+B i,j ]+[V×A i,j +O i,j ] (39)

[0141] D. i,j (T L ,t 0 ) = t0 ×[G i,j ×L(T L )+B i,j ]+[V×A i,j +O i,j ] (40)

[0142] D. i,j (T H ,t C ) = t C ×[G i,j ×L(T H ...

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 relates to a multi-dimensional joint non-uniformity correction method for an infrared imaging system, belonging to the technical field of infrared imaging. The method calculates correction parameters by referring to multi-dimensional information obtained from different temperatures and different integration times of radiation sources, and is used for non-uniformity adaptive correction of infrared imaging systems working at different integration times. At the same time, the image collected by the actual target is subtracted from the base image before correction, and the offset error is automatically eliminated in real time, so that the imaging system does not need to use shutters, baffles and other devices, and can effectively correct non-uniformity under different environments and bias voltage conditions . Advantageously, the method requires small storage capacity and calculation amount, is convenient for hardware implementation, and can complete correction for target imaging with different integration times with only one set of correction parameters, which has engineering practicability.

Description

technical field [0001] The invention belongs to the technical field of infrared imaging, and in particular relates to a multi-dimensional joint non-uniformity correction method for an infrared imaging system. Background technique [0002] The uneven distribution of images in space will seriously affect the performance of the infrared imaging system and adversely affect its use. Therefore, non-uniformity correction is required to meet the actual use requirements. The non-uniformity of the infrared imaging system mainly comes from the non-uniformity of the infrared detector response, the non-uniformity of the electronic device of the readout circuit, and the non-uniformity introduced by the optical system and interconnection. Among them, the infrared detector and the readout circuit are the most important sources of non-uniformity. [0003] There are two main categories of non-uniformity correction techniques: reference radiation source-based non-uniformity correction and sce...

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 & AuthorityPatents(China)
IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/80
Inventor陈楠姚立斌张济清钟昇佑李正芬毛文彪韩庆林
OwnerKUNMING INST OF PHYSICS