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The ac-based electrical capacitance tomography (ECT) system has been successfully used for visualizing gas–solid flow in various industrial processes, such as pneumatic conveyor and fluidized bed. However, the solid particles in gas–solid systems are charged due to the collisions between particles and pipe wall. The particle charging decreases the image reconstruction accuracy of the ac-based ECT...
The flame temperature distribution measurement is very important for the combustion diagnosis. This paper presents a fast inversion method for 2-D flame temperature distribution reconstruction. Two orthogonal-arranged focused light field cameras are used to acquire the radiative intensities of the flame in different directions. The general source multi-flux method is chosen as direct solving model...
Process tomography (PT) has been widely investigated and developed to measure the cross-sectional distribution of multiphase flow parameters based on different sensing techniques in the past decades. Electrical capacitance tomography (ECT) is a relatively mature method for detecting solid particle concentration while electrostatic tomography(EST) is a new technique to measure the charge distribution...
According to the formation principles of the orthogonal vanishing point in perspective projection, and the camera's intrinsic parameter matrix invariance, a approach of stratified reconstruction is discussed through the use of the structural information of scene. Firstly, using corresponding points in a pair of images solve the fundamental matrix. In order to improve the precision of fundamental matrix,...
The infinite homography matrix plays an important role in affine reconstruction. The new constraint between the homography of the infinity plane and the epipole is that the epipolar geometry can get a new equation after analyze. According to the new constraint, the infinite homography matrix can be linear solved, and the affine reconstruction can be also gotten through the triangulation principle...
The three dimensional (3-D) flame temperature measurement is of great significance to the study of flame structure, fuel mixing and combustion mechanism, and the stability of combustion control. This paper presents the design, implementation and evaluation of a 3-D imaging system based on optical sectioning tomography to reconstruct the temperature distribution of candlelight. A 3-D luminous object...
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