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Contrast Enhancement Method Based on Gray and Its Distance Double-Weighting Histogram Equalization for 3D CT Images of PCBs
Joint Authors
Zeng, Lei
Wang, Weidong
Yan, Bin
Source
Mathematical Problems in Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-05-04
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Cone beam computed tomography (CBCT) is a new detection method for 3D nondestructive testing of printed circuit boards (PCBs).
However, the obtained 3D image of PCBs exhibits low contrast because of several factors, such as the occurrence of metal artifacts and beam hardening, during the process of CBCT imaging.
Histogram equalization (HE) algorithms cannot effectively extend the gray difference between a substrate and a metal in 3D CT images of PCBs, and the reinforcing effects are insignificant.
To address this shortcoming, this study proposes an image enhancement algorithm based on gray and its distance double-weighting HE.
Considering the characteristics of 3D CT images of PCBs, the proposed algorithm uses gray and its distance double-weighting strategy to change the form of the original image histogram distribution, suppresses the grayscale of a nonmetallic substrate, and expands the grayscale of wires and other metals.
The proposed algorithm also enhances the gray difference between a substrate and a metal and highlights metallic materials.
The proposed algorithm can enhance the gray value of wires and other metals in 3D CT images of PCBs.
It applies enhancement strategies of changing gray and its distance double-weighting mechanism to adapt to this particular purpose.
The flexibility and advantages of the proposed algorithm are confirmed by analyses and experimental results.
American Psychological Association (APA)
Zeng, Lei& Yan, Bin& Wang, Weidong. 2016. Contrast Enhancement Method Based on Gray and Its Distance Double-Weighting Histogram Equalization for 3D CT Images of PCBs. Mathematical Problems in Engineering،Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1111736
Modern Language Association (MLA)
Zeng, Lei…[et al.]. Contrast Enhancement Method Based on Gray and Its Distance Double-Weighting Histogram Equalization for 3D CT Images of PCBs. Mathematical Problems in Engineering No. 2016 (2016), pp.1-13.
https://search.emarefa.net/detail/BIM-1111736
American Medical Association (AMA)
Zeng, Lei& Yan, Bin& Wang, Weidong. Contrast Enhancement Method Based on Gray and Its Distance Double-Weighting Histogram Equalization for 3D CT Images of PCBs. Mathematical Problems in Engineering. 2016. Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1111736
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1111736