Optimization method of Hadamard coding plate in γ-ray computational ghost imaging

Zhi Zhou; San-Gang Li; Qing-Shan Tan; Li Yang; Ming-Zhe Liu; Ming Wang; Lei Wang; Yi Cheng

doi:10.1007/s41365-022-01164-1

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Optimization method of Hadamard coding plate in γ-ray computational ghost imaging

ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS | Updated：2023-02-13

- Optimization method of Hadamard coding plate in γ-ray computational ghost imaging
- Nuclear Science and Techniques Vol. 34, Issue 1, Article number: 13(2023)
- Affiliations：
  
  1.College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China
  2.Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province, Chengdu University of Technology, Chengdu 610059, China
  3.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Science, Hefei 230031, China
  4.University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  * lisangang@cdut.edu.cn
- Funds：
- DOI：10.1007/s41365-022-01164-1
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Zhi Zhou, San-Gang Li, Qing-Shan Tan, et al. Optimization method of Hadamard coding plate in γ-ray computational ghost imaging. [J]. Nuclear Science and Techniques 34(1):13(2023)
DOI：

Zhi Zhou, San-Gang Li, Qing-Shan Tan, et al. Optimization method of Hadamard coding plate in γ-ray computational ghost imaging. [J]. Nuclear Science and Techniques 34(1):13(2023) DOI： 10.1007/s41365-022-01164-1.

摘要

Abstract

Owing to the constraints on the fabrication of γ-ray coding plates with many pixels, few studies have been carried out on γ-ray computational ghost imaging. Thus, the development of coding plates with fewer pixels is essential to achieve γ-ray computational ghost imaging. Based on the regional similarity between Hadamard subcoding plates, this study presents an optimization method to reduce the number of pixels of Hadamard coding plates. First, a moving distance matrix was obtained to describe the regional similarity quantitatively. Second, based on the matrix, we used two ant colony optimization arrangement algorithms to maximize the reuse of pixels in the regional similarity area and obtain new compressed coding plates. With full sampling, these two algorithms improved the pixel utilization of the coding plate, and the compression ratio values were 54.2% and 58.9%, respectively. In addition, three undersampled sequences (the Harr, Russian dolls, and cake-cutting sequences) with different sampling rates were tested and discussed. With different sampling rates, our method reduced the number of pixels of all three sequences, especially for the Russian dolls and cake-cutting sequences. Therefore, our method can reduce the number of pixels, manufacturing cost, and difficulty of the coding plate, which is beneficial for the implementation and application of γ-ray computational ghost imaging.

关键词

Keywords

γ-ray computational ghost imagingRegional similarityHadamard coding plate

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