An Error Compensation Method Applicable to the Swing Angle of the Rotation Axis of the Neutron Tomography System
A technology of neutron tomography and axis of rotation, applied in image analysis, image data processing, 3D modeling, etc. Reliability and other issues, to achieve consistent clarity, reduce manufacturing and installation accuracy requirements, and ensure the effect of uniqueness
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[0124] The parameters of the scanning device used in the experiment are as follows:
[0125] (1) Neutron source: cold neutron source
[0126] (2) Area array detector: the imaging size is 2048×2048, and the pixel size is 0.2mm.
[0127] Experimental steps:
[0128] (1) Place a tested sample on the scanning platform, start the scanning platform to rotate to drive the tested sample to rotate 360° step by step, with a step angle of 0.5°, and collect 720 projection images in total. Ostu threshold segmentation is performed on all projection images to obtain 720 segmented projection images; then all the segmentation projection images are superimposed into a two-dimensional matrix, which is the composite projection image P ave ,like Figure 4 shown.
[0129] (2) According to the step of obtaining gradient angle and gradient angle histogram in the method of the present invention, obtain the synthetic projection image P ave The gradient angles of all pixels, and the histogram F(β) ...
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