Presentation Details
  1. Home
  2. Presentation List
  3. Presentation Details
Fast Autofocus Based on Dual-Image with Frequency-Domain Defocus Representation
ID：31 View Protection：ATTENDEE Updated Time：2026-09-15 11:10:01 Hits：8 Poster Presentation

Start Time：Pending（Asia/Shanghai）

Duration：Pending

Session：No Session »

No files

Abstract
自动对焦是实现相机锐利成像的关键任务。传统的全球搜索方法耗时且难以满足在线高速成像的需求。一种双图像频域自动对焦方法，其中由两幅去焦图像的径向功率谱比构建出一个频域去焦点表示（FDR），并与 通过轻量级卷积网络提取的空间特征融合。通过端到端单步回归，模型直接预测了一个带符号的散焦步骤，该步骤指定了散焦的大小和方向。在涵盖金属、注塑零件、多氯米达板和纸张等多种工业表面的数据集上，该方法验证MAE为1.60 fv。与无FDR的双影像基线（2.41 fv）相比，FDR的引入使MAE降低了约33.6%。此外，与爬山搜索相比，该方法仅需捕获两帧即可达到93.8%的对焦成功率，显示出工业测量中实时自动对焦的明显优势。
 
Keywords
autofocus; dual-image input; frequency-domain defocus feature; power spectrum ratio
Speaker
Xu Liang
Master Student Jiangxi University of Science and Technology

Submission Author
Xu Liang Jiangxi University of Science and Technology
Lirong Huang Jiangxi University of Science and Technology
Yaofeng Wu NingboTech University
Han Wang Jiangxi University of Science and Technology
Ke Meng NingboTech University
Xiang Yan Zhejiang Wanli University
Submit Comment
Verify Code Change Another
All Comments
Important Date

  • Conference Date

    Nov 06

    2026

    to

    Nov 08

    2026

  • Oct 15 2026

    Draft paper submission deadline

Sponsored By
IEEE Instrumentation and Measurement Society
Organized By
Sichuan University
Contact Information
Login to view full contact details
Previous Conferences