Error compensation method applicable to rotation axis swing angle of neutron chromatography imaging system
A technology of neutron tomography and rotation axis, which is applied in image analysis, image data processing, 3D modeling, etc., can solve the problem of uneven distribution of fault definition, which affects the accuracy of 3D reconstruction model and the reliability of feature information measurement. Reliability and other issues
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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 ,Such as 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(...
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