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Sub-pixel image synthesis method of dual line array imaging device based on multi-resolution analysis

An imaging device and image synthesis technology, applied in the field of space remote sensing imaging, can solve the problems of complex image restoration process, limited image resolution, and no effective analysis of the entire image.

Active Publication Date: 2019-04-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] At present, most of the sub-pixel synthesis algorithms are based on the idea of ​​linear interpolation. The common feature of these algorithms is that they only consider some pixel points around the desired pixel point, instead of effectively analyzing the entire image, resulting in image The resolution is limited, and the process of image restoration in step 3 is very complicated

Method used

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  • Sub-pixel image synthesis method of dual line array imaging device based on multi-resolution analysis
  • Sub-pixel image synthesis method of dual line array imaging device based on multi-resolution analysis
  • Sub-pixel image synthesis method of dual line array imaging device based on multi-resolution analysis

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Embodiment 1

[0096] see figure 1 Shown is a flow chart of a sub-pixel image synthesis method of a dual linear array imaging device based on multi-resolution analysis described in this application, the sub-pixel image synthesis method of a dual linear array imaging device based on multi-resolution analysis includes:

[0097] Step 101, in the imaging detector represented by the linear array CCD, package the two linear array CCDs in the same focal plane device, or simultaneously image the two linear arrays by means of optical splitting, and combine the two linear array CCDs Stagger half a pixel in the line array direction and flight direction respectively, and acquire two low-resolution images A and B respectively;

[0098] Step 102: Using the image B as a reference image, perform a histogram transformation on the image A, so that the histogram of the image A is consistent with the histogram of the image B Figure 1 Consistent, get the matched image C;

[0099] Step 103, performing image re...

Embodiment 2

[0107] On the basis of the method described in Embodiment 1, in the above step 101, the two linear array CCDs are respectively staggered by half a pixel in the linear array direction and the flight direction, and two low-resolution images A and image B are obtained respectively, further as follows:

[0108] Using prism spectroscopic technology, sampling is carried out by staggering half a pixel in the linear array direction and flight direction of the CCD detector, see figure 2 , according to the linear array direction and the flight direction, the CCD detector (shown as CCD in the figure A and CCD B ) center coordinates are set to (0,0) and (0,p / 2) respectively. During the push-broom imaging process, two CCDs acquire two low-resolution images A and B at the same time.

[0109] In the above step 102, the process of histogram matching can be found in image 3 , through the detector CCD A Image A is acquired through the detector CCD B Image B is obtained, and image B is use...

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Abstract

The invention discloses a multi-resolution analysis based double-linear-array imaging device sub-pixel image synthesis method, which comprises the steps of respectively sampling in a CCD linear array direction and a flight direction in a manner of staggering half pixel so as to acquire two low-resolution images which are an image A and an image B; carrying out histogram matching on the image A by taking the image B as a reference image so as to acquire a matched image C, carrying out image registration on the image B and the image C, synthesizing the image B and the image C into a composite image; and carrying out interpolation processing on the composite image, finally carrying out filtering reconstruction on the interpolation processed image through a specially designed filter, and thus acquiring a high-resolution image. According to the scheme, the method of synthesizing the high-resolution image by using acquired oversampling data under the condition of not changing system parameters solves a problem at present that the image resolution is limited due to lack of high-resolution CCDs, the use efficiency of the system is greatly improved, and the cost is reduced.

Description

technical field [0001] The present application relates to the technical field of space remote sensing imaging, in particular to a sub-pixel image synthesis method of a dual linear array imaging device based on multi-resolution analysis. Background technique [0002] In aerospace, chemical energy and other industrial fields, many important components such as turbine engines and surface structures of supersonic vehicles will serve in high-temperature environments for a long time. However, because the high temperature environment is very harsh, it is difficult to apply the research methods at room temperature to high temperature. Therefore, most of the current research on the change of material properties at high temperature is in the qualitative research stage. Quantitative and accurate observation and measurement of the process can better study the material behavior characteristics of materials at high temperature and at normal temperature, so as to break through the high tem...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40
CPCG06T3/4007G06T3/4053
Inventor 孔祥皓高昆郭越杨桦韩璐陈卓一张健
Owner BEIJING INSTITUTE OF TECHNOLOGYGY