浮游藻类细胞微流控-显微图像形变校正方法 -

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浮游藻类细胞微流控-显微图像形变校正方法

doi:10.37188/CO.2022-0244

胡翔^{1, 2,},
殷高方^{1, 2, 3,,},
赵南京^{1, 2, 3, 4,,},
何前锋⁵,
梁天泓^{2, 3},
黄朋^{1, 2},
徐敏^{2, 3},
贾仁庆^{2, 3}

1.
合肥学院生物学院, 安徽合肥 230601
2.
中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 安徽合肥 230031
3.
中国科学技术大学, 安徽合肥 230026
4.
安徽大学, 安徽合肥 230601
5.
安徽省合肥生态环境监测中心, 安徽合肥 230088

基金项目:安徽省科技重大专项（No. 202203a07020002，No. 202003a07020007）；国家重点研发计划（No. 2022YFC3103901，No. 2021YFC3200100）；国家自然科学基金（No. 61875207）；深圳市可持续发展科技专项（No. KCXFZ20201221173007020）

详细信息

作者简介:
胡　翔（1998—），男，安徽铜陵人，硕士研究生，2016年于滁州学院获得学士学位，2020—2023年就读于合肥学院，2021—2023年在中国科学院安徽光学精密机械研究所进行联合培养。主要从事微流控-显微成像方面的研究。E-mail：1962471065@qq.com
殷高方（1979—），男，安徽枞阳人，博士，研究员，博士生导师，2003年于安徽师范大学获得学士学位，2011年于中国科学院安徽光学精密机械研究所获得博士学位，现为中国科学院合肥物质科学研究院安徽光学精密机械研究所研究员，主要从事水体浮游生物和微生物光学检测技术的研究。E-mail：gfyin@aiofm.ac.cn
赵南京（1976—），男，安徽砀山人，博士，研究员，博士生导师，1999年于合肥工业大学获得学士学位，2005年于中国科学院安徽光学精密机械研究所获得博士学位，现为中国科学院合肥物质科学研究院安徽光学精密机械研究所研究员，主要从事环境光学检测技术研究。E-mail：njzhao@aiofm.ac.cn

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出版历程
- 收稿日期:2022-11-28
- 录用日期:2023-02-24
- 修回日期:2023-01-06
- 网络出版日期:2023-03-21

Microfluidic-microscopic image deformation correction method for planktonic algal cells

HU Xiang^{1, 2,},
YIN Gao-fang^{1, 2, 3,,},
ZHAO Nan-jing^{1, 2, 3, 4,,},
HE Qian-feng⁵,
LIANG Tian-hong^{2, 3},
HUANG Peng^{1, 2},
Xu Min^{2, 3},
JIA Ren-qing^{2, 3}

1.
College of Biology, Hefei University, Hefei 230601, China
2.
Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
3.
University of Science and Technology of China, Hefei 230026, China
4.
Anhui University, Hefei 230601, China
5.
Anhui Hefei Ecological Environment Monitoring Center, Hefei 230088, China

Funds:Supported by Anhui Province Science and Technology Major Special Project (No. 202203a07020002, No. 202003a07020007)；National key research and development program (No. 2022YFC3103901, No. 2021YFC3200100)；the National Natural Science Foundation of China (No. 61875207); Shenzhen Sustainable Development Science and Technology Project (No. KCXFZ20201221173007020)

More Information

Corresponding author:gfyin@aiofm.ac.cn;njzhao@aiofm.ac.cn

摘要

摘要:
流式细胞显微图像分析法是水体浮游藻类自动鉴别的重要发展方向，快速进样条件下细胞显微图像将产生形变，影响浮游藻类自动鉴别准确率。本文基于搭建的浮游藻类微流控-显微成像实验系统，通过对不同进样流速下藻类细胞显微形变和图像清晰度的分析，研究了流速对显微成像形变的影响规律。分析基于卷帘快门拍摄运动物体产生形变原理，提出了单向偏移像素的图像形变校正方法，并与藻类细胞静态条件下获取的图像进行了对比分析。实验结果表明：静态条件下，湖生卵囊藻细胞的图像长宽比及清晰度均值分别为1.16和116.53；动态进样过程中，随着流速增大细胞图像形变（长宽比）逐渐增大、清晰度降低；95 µL/min进样流速下，校正前后细胞图像长宽比均值分别为1.35和1.26，形变离散程度由校正前的0.33降至0.1，与静态细胞形态接近且校正前后图像清晰度基本不变。本文研究结果为提升水体浮游藻类细胞自动鉴别准确率提供了依据。
- 浮游藻类/
- 微流控-显微成像/
- 图像形变/
- 校正方法
Abstract:
Flow cytomicrographic analysis is an important development in the automatic identification of planktonic algae in a water column, but the accuracy of this process is affected by the deformation of microscopic images under rapid injection conditions. Based on a microfluidic-microscopic imaging system for planktonic algae, the effects of flow rate on the deformation of microscopic images were investigated by analyzing the deformation of algal cells and image clarity at different injection flow rates. Based on the principle of deformation caused by photographing a moving object using a rolling shutter, a method of image deformation correction with unidirectional offset pixels is proposed and analyzed by comparing its results with images acquired under static conditions of algal cells. The experimental results showed that the average aspect ratio and sharpness of L values for oocystis cell images under static conditions were 1.16 and 116.53, respectively; during the dynamic injection process, the deformation (aspect ratio) of the cell images gradually increased and the sharpness decreased as the flow rate increased; the average values of aspect ratio before and after correction were 1.35 and 1.26 respectively at 95µL/min injection flow rate, and the dispersion of deformation decreased from 0.33 before correction to 0.1. The results are close to that of static cell morphology and the image sharpness is basically same. The results provide a method for improving the accuracy of the automatic identification of planktonic algal cells in a water column.
- planktonic algal/
- microfluidics-microscopic imaging/
- image deformation/
- correction method

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图 1实验装置示意图

Figure 1.Schematic diagram of experiment system

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图 2微流控芯片封装实物图

Figure 2.Physical view of microfluidic chip package

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图 3卷帘快门工作方式及图像形变校正方法

Figure 3.Rolling shutter working mode and image deformation correction method

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图 4静态条件下拍摄的（a）藻类图片和（b）算法提取出的单个藻类图片

Figure 4.(a) Algae images taken under static conditions and (b) individual algae images pictures extracted by the proposed algorithm

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图 5不同流速下湖生卵囊藻单细胞图片

Figure 5.Pictures of single cells of Oocysts lacustis at different flow rates

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图 6不同流速下湖生卵囊藻图像质量

Figure 6.Image quality of Oocysts lacustis at different flow rates

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图 7不同流速下校正前后湖生卵囊藻单细胞图像

Figure 7.Pictures of single cells of Oocysts lacustis before and after restoration at different flow rates

下载: 全尺寸图片幻灯片

图 8不同流速校正前后藻类细胞长宽比

Figure 8.Aspect ratios of algal cell before and after correction at different flow rates

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图 9不同流速下湖生卵囊藻校正前后平均图像质量

Figure 9.Average image qualities before and after restoration of Oocysts lacustis at different flow rates

下载: 全尺寸图片幻灯片

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