• Acta Photonica Sinica
  • Vol. 50, Issue 3, 22 (2021)
SU Jie1, ZHAI Aiping2, ZHAO Wenjing2, HAN Qing1, and WANG Dong1、2
Author Affiliations
  • 1Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan030024, China
  • 2College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan03004, China
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    DOI: 10.3788/gzxb20215003.0311003 Cite this Article
    Jie SU, Aiping ZHAI, Wenjing ZHAO, Qing HAN, Dong WANG. Hadamard Single-pixel Imaging Using Adaptive Oblique Zigzag Sampling[J]. Acta Photonica Sinica, 2021, 50(3): 22 Copy Citation Text show less

    Abstract

    Single-pixel imaging has made significant progress in imaging quality and speed. However, how to improve the imaging speed while ensuring the imaging quality is still a problem to be solved. Based on the finding that the average value of the absolute value of the Hadamard coefficients of each oblique line declines rapidly, an adaptive oblique zigzag sampling method is proposed to achieve the expected imaging speed and quality. Experimental results show that the number of sampling and the amount of data acquisition can be effectively reduced using the proposed method, improving the imaging speed while ensuring the imaging quality. Compared with the single-pixel imaging using sequential sampling, the imaging quality of the proposed method is better under the same sampling rate.

    0 Introduction

    Single-pixel Imaging (SPI), which is different from traditional imaging, has its advantages. For example, in infrared and terahertz imaging, traditional array-based imaging sensors and systems are relatively bulky, complicated, and usually demand additional auxiliary modules which make them expensive. In contrast, SPI provides a better solution in which only a single point detector is needed, and the setup of the system is simple, which significantly reduces the costs. It is developed with the advent of the Compressed Sensing (CS) theory. In 2006, DONOHO D L 1and CANDÈS E J 2 proposed the CS theory. In 2008, DUARTE M F 3 realized the SPI based on CS, which suggested that CS 1-6 had a broad prospect in the field of SPI. In addition to CS, Hadamard Transform (HT) 7-15, Fast Fourier Transform (FFT) 14-21, Wavelet transform 1522 and so on have been used in SPI to reconstruct the object, due to the low hardware requirements, short imaging time, and good imaging performance. Among them, HT has the merits of deterministic orthogonal basis patterns and can produce binary patterns that can be conveniently implemented by a Spatial Light Modulator (SLM) such as a digital Micro-Mirror Device (DMD). Therefore, it is widely utilized in SPI.

    Copy Citation Text
    Jie SU, Aiping ZHAI, Wenjing ZHAO, Qing HAN, Dong WANG. Hadamard Single-pixel Imaging Using Adaptive Oblique Zigzag Sampling[J]. Acta Photonica Sinica, 2021, 50(3): 22
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