• 学术论文 •

### 双线阵无透镜超分辨率扫描成像方法研究

1. 西安理工大学自动化与信息工程学院，陕西 西安 710048
• 收稿日期:2021-07-19 修回日期:2022-04-19 出版日期:2022-10-25
• 作者简介:
• 田典 男，1996年生，陕西西安人．现为西安理工大学博士研究生.主要研究方向为超大规模集成电路、图像处理、无透镜成像等．E-mail: 2180320059@stu.xaut.edu.cn
余宁梅（通讯作者） 女，1963年生，陕西西安人．现为西安理工大学教授，博士生导师.主要研究方向为超大规模集成电路设计及工艺、图像处理以及无透镜成像等.
周广霖 男，1997年生，陕西西安人．现为西安理工大学硕士研究生，主要研究方向为超大规模集成电路、图像处理、无透镜成像等．E-mail: 2200320093@stu.xaut.edu.cn
李娜 女，1995年生，内蒙古托克托人．西安理工大学硕士，主要研究方向为超大规模集成电路、图像处理、无透镜成像等．E-mail: 2190320070@stu.xaut.edu.cn
• 基金资助:
• 国家自然科学基金 (61771388)

### Research on Super-Resolution Scanning Imaging Method for Lensless with Dual-Line Array

TIAN Dian, YU Ning-mei, ZHOU Guang-lin, LI Na

1. School of Automation and Information Engineering，Xi’an University of Technology，Xi’an，Shaanxi 710048，China
• Received:2021-07-19 Revised:2022-04-19 Online:2022-10-25 Published:2022-10-11

Abstract:

Aiming at the problems of the low resolution in lensless imaging systems and the reconstruction distortion in single-line array scanning imaging systems, a super-resolution scanning imaging method is proposed for lensless using a dual-line array image sensor. The cell’s velocity can be measured in real-time using the space-time displacement of the dual-line array, which provides accurate parameters for the reconstruction. Considering the system characteristics of optical wavelength, diffraction light path, cell sample flow rate, pixel size of the image sensor, tilt angle, and frame rate, the scanning imaging model of the scanning imaging system is established. The factors affecting the imaging quality of the dual-line array are analyzed, and the image reconstruction model of the dual-line array scanning imaging system is established by coordinate transformation and scanned image interpolation calculation. By synthesizing the two models and taking the strip pattern as the simulation object, the imaging characteristics are analyzed, and the feasibility and effectiveness of the dual-line array scanning imaging system are verified theoretically. The simulation results show that the spatial resolution of the scanning imaging system with a dual-line array is at least 2.8 times higher than that of the system with an area array, and the SSIM and PSNR are improved by 5%~15%. On this basis, a scanning imaging system for lensless with a dual-line array was built, and the microspheres, red blood cells, and white blood cells were used as test objects to test the system. The results show that the problems of the reconstruction distortion in single-line array scanning imaging systems can be solved with a dual-line array scanning imaging. The mean diameter error of 20 μm microsphere is 2.04% between the scanning imaging system with dual-line array and the area array imaging system, and the characteristics of red blood cells and white blood cells are more obvious under the scanning imaging system with the dual-line array.