ART flame slice reconstruction algorithm based on radial gradient total variation

A radial gradient and slice reconstruction technology, which is applied in computing, image data processing, instruments, etc., can solve the problems of poor reconstruction effect and ineffective use of flame sparse characteristics

Active Publication Date: 2016-11-09
TIANJIN UNIV
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Problems solved by technology

Therefore, the key to reconstructing the 3D shape of the flame is to reconstruct the slices of the flame 2D projection image. The accuracy of the slice reconstruction determines the effect

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  • ART flame slice reconstruction algorithm based on radial gradient total variation
  • ART flame slice reconstruction algorithm based on radial gradient total variation
  • ART flame slice reconstruction algorithm based on radial gradient total variation

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Both compressed sensing sparse reconstruction and algebraic iterative reconstruction methods have the characteristics of reconstructing the original complete image data from a small amount of projection data, and the combustion flame image of a gasoline engine presents a sparse structure of luminance aggregate blocks, which has a better sparse structure in the TV domain. Therefore, the total variation optimization can be introduced into the ART algorithm to reconstruct the slice image of the gasoline engine flame, so as to improve the reconstruction effect of the flame slice.

[0037] First, establish a radial gradient total variation model: set the center of the flame image as the origin, establish a polar coordinate system, and...

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Abstract

The invention discloses an ART (Algebraic Reconstruction Technique) flame slice reconstruction algorithm based on radial gradient total variation (TV), comprising: preprocessing a flame image; generating a projection image; solving a reconstruction weight matrix W according to an ART criterion; reconstructing an image according to ART; solving the radial gradient and radial gradient TV of each reconstruction image; adjusting an image according to a radial TV method; and outputting a reconstruction image. Compared with the prior art, the ART flame slice reconstruction algorithm cam effectively improve flame image slice reconstruction quality and reconstruction speed; in particular, when projecting angles are less, algorithm decorrelation is better, radial gradient images are more sparse, a flame reconstruction process has high stability, and algorithm robustness is strong.

Description

technical field [0001] The invention relates to the field of flame image reconstruction, in particular to an internal combustion engine combustion flame slice reconstruction algorithm. Background technique [0002] In recent years, the air pollution caused by vehicle exhaust emissions has become increasingly serious, and has become one of the important reasons for the formation of haze weather. The energy saving and emission reduction of internal combustion engines has attracted global attention. As an important characterization of the combustion process in the cylinder of an internal combustion engine, the combustion flame is of great significance for studying the mechanism of flame combustion, reducing combustion emissions and improving the performance of internal combustion engines. The development of modern optical methods and computer technology makes it possible to directly observe the flame combustion process of internal combustion engines by using optical visualizati...

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Application Information

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IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/002G06T5/50
Inventor 张淑芳王馥瑶韩泽欣张聪
Owner TIANJIN UNIV
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