Movement compensation method for star sky background image

A motion compensation, starry sky background technology, applied in the field of starry sky background image processing, can solve the problems of low accuracy and low motion compensation speed, and achieve the effects of improving accuracy, reducing the amount of calculation, and reducing the amount of information

Inactive Publication Date: 2009-01-14
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings of low speed and low precision of motion compensation in the prior art, the present invention provides a motion compensation method in starry sky background image, which adopts a method based on block matching, which ca...

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  • Movement compensation method for star sky background image
  • Movement compensation method for star sky background image
  • Movement compensation method for star sky background image

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Embodiment Construction

[0013] Refer to attached picture. 1. First perform sample feature motion estimation.

[0014] The deep space background appears black in the imaging image, and the stars are similar to weak and small moving targets, which appear as point sources in the imaging image. Due to the detection equipment itself, there is still a lot of noise in the imaging image. Fully considering the characteristics of the imaging image and the detection of moving objects in the background of the starry sky, the abnormal points are eliminated directly in the sample selection stage, which avoids the calculation of global parameters by the iterative weighted least squares method in the camera model motion model parameter estimation stage, eliminating the need for The solution of the weight function simplifies the process of obtaining the global parameters, effectively shortens the time of background compensation, and reduces the amount of calculation.

[0015] The basic process of the sample feature ...

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Abstract

The invention discloses a motion compensation method of a starry sky background image. The method comprises the steps that: first, according to the gray scale and the motion feature of the starry sky background image, motion background compensation is carried out by utilizing two key processes of sample motion parameter estimation and integral motion parameter estimation. An abnormal point is directly removed in the sample motion vector estimation stage and the amount of calculating redundant information in the motion compensation method is reduced; and second, the method of the combination of block matching and centroid extraction is introduced in the sample motion parameter estimation stage. Due to the adoption of the block matching method, the operation speed of sample estimation is raised, the removal of the abnormal point furthermore reduces the amount of data information to be processed and the method based on the centroid extraction further improves the precision of a sample point estimation parameter. The motion compensation method adopts the method based on the combination of the block matching and the centroid extraction to achieve motion compensation in the starry sky background, therefore, calculation amount is lowered by 50 percent and the compensation precision is improved to 0.5 pixels from 1 pixel of the prior art.

Description

technical field [0001] The invention relates to a method for processing a starry sky background image, in particular to a motion compensation method in the starry sky background image. Background technique [0002] The problem of weak and small target detection in the complex motion background directly determines the range and detection performance of the astronomical observation system, and the motion background compensation is one of the key technologies for weak and small target detection. [0003] The document "Motion Background Compensation Technology Based on Robust Regression, Signal Processing, 2002, 18(1): 36-38" discloses a method based on optical flow to estimate the motion parameters of sample points, and uses iterative weighted least squares Multiplication estimates the global motion parameters, avoiding the error of global motion parameter estimation caused by the target point being taken as a sampling point, but the calculation of the weight function greatly i...

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Application Information

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IPC IPC(8): G06T7/20G06T7/00G06T7/223
Inventor 张艳宁孙瑾秋姜磊段锋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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