基于动态视觉传感器的铝基盘片表面缺陷检测

马居坡; 陈周熠; 吴金建

doi:10.16383/j.aas.c240307

基于动态视觉传感器的铝基盘片表面缺陷检测

doi: 10.16383/j.aas.c240307 cstr: 32138.14.j.aas.c240307

马居坡^{1, 2,},
陈周熠^1,,
吴金建^{1, 2,}

1.
西安电子科技大学人工智能学院西安 710071
2.
琶洲实验室(黄埔) 广州 510555

基金项目: 国家重点研发计划(2023YFA1008500), 陕西省自然科学基础研究计划(2024JC-YBQN-0627), 中央高校基本科研业务费专项资金(XJSJ23079, ZYTS24006)资助

详细信息

作者简介:
马居坡：西安电子科技大学人工智能学院讲师. 主要研究方向为仿生动态视觉处理和视觉缺陷检测. E-mail: majupo@xidian.edu.cn

陈周熠：西安电子科技大学人工智能学院博士研究生. 主要研究方向为仿生动态视觉处理和视觉缺陷检测. E-mail: chenzhouyi@stu.xidian.edu.cn

吴金建：西安电子科技大学人工智能学院教授. 主要研究方向为高质量成像和图像智能处理. 本文通信作者. E-mail: jinjian.wu@mail.xidian.edu.cn

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出版历程
- 收稿日期: 2024-06-03
- 录用日期: 2024-07-23
- 网络出版日期: 2024-08-28

Dynamic Vision Sensor based Defect Detection for the Surface of Aluminum Disk

MA Ju-Po^{1, 2
,},
CHEN Zhou-Yi^1
,,
WU Jin-Jian^{1, 2
,}

1.
School of Artificial Intelligence, Xidian University, Xi＇an 710071
2.
Pazhou Lab (Huangpu), Guangzhou 510555

Funds: Supported by National Key Research and Development Program of China (2023YFA1008500), Natural Science Basic Research Program of Shaanxi (2024JC-YBQN-0627), and the Fundamental Research Funds for the Central Universities (XJSJ23079, ZYTS24006)

More Information

Author Bio:
MA Ju-Po　Lecturer at the School of Artificial Intelligence, Xidian University. His research interest covers bionic dynamic vision processing and visual defect detection

CHEN Zhou-Yi　Ph.D. candidate at the School of Artificial Intelligence, Xidian University. His research interest covers bionic dynamic vision processing and visual defect detection

WU Jin-Jian　Professor at the School of Artificial Intelligence, Xidian University. His research interest covers high-quality imaging and intelligent image processing. Corresponding author of this paper

摘要

摘要: 现有视觉缺陷检测技术通常基于传统电荷耦合器件(Charge-coupled device, CCD)或互补金属氧化物半导体(Complementary metal-oxide-semiconductor, CMOS)相机进行缺陷成像和后端检测算法开发. 然而, 现有技术存在成像速度慢、动态范围小、背景干扰大等问题, 难以实现对高反光产品表面弱小瑕疵的快速检测. 针对上述挑战, 创新性地提出了一套基于动态视觉传感器(Dynamic vision sensor, DVS)的缺陷检测新模式, 以实现对具有高反光特性的铝基盘片表面缺陷的高效检测. DVS是一种新型的仿生视觉传感器, 具有成像速度快、动态范围大、运动目标捕捉能力强等优势. 首先开展了面向铝基盘片高反光表面弱小瑕疵的DVS成像实验, 并分析总结了DVS缺陷成像的特性与优势. 随后, 构建了第一个基于DVS的缺陷检测数据集(Event-based defect detection dataset, EDD-10k), 包含划痕、点痕、污渍三类常见缺陷类型. 最后, 针对缺陷形态多变、纹理稀疏、噪声干扰等问题, 提出了一种基于时序不规则特征聚合框架的DVS缺陷检测算法(Temporal irregular feature aggregation framework for event-based defect detection, TIFF-EDD), 实现对缺陷目标的有效检测.
- 缺陷检测 /
- 动态视觉传感器 /
- 高反光表面 /
- 不规则特征提取 /
- 时序融合 /
- 事件相机
Abstract: Current visual defect detection technologies usually rely on conventional charge-coupled device (CCD) or complementary metal-oxide-semiconductor (CMOS) cameras for defect imaging and the development of backend detection algorithms. However, these technologies encounter challenges such as slow imaging speed, limited dynamic range, and significant background interference, which hinder the rapid detection of minor defects on highly reflective product surfaces. To address these challenges, we innovatively propose a new defect detection mode based on dynamic vision sensor (DVS) to achieve efficient defect detection on the highly reflective surfaces of aluminum disks. DVS is a novel bio-inspired visual sensor with advantages such as fast imaging speed, high dynamic range, and excellent ability to capture moving objects. First, we conduct DVS imaging experiments for minor defects on the highly reflective surfaces of aluminum disk and analyze the characteristics and advantages of DVS on defect imaging. Then, we establish the first event-based defect detection dataset (EDD-10k) based on DVS, including three common defect types: Scratch, point and stain. Finally, to address the issues such as varying defect shapes, sparse textures, and noise interference, we propose a temporal irregular feature aggregation framework for event-based defect detection (TIFF-EDD), and realize the effective detection of defect targets.
- Defect detection /
- dynamic vision sensor (DVS) /
- highly reflective surface /
- irregular feature extraction /
- temporal fusion /
- event camera
注释:

1) 1¹ 1微米 = 10000埃

2) 3² 由于在事件可视化时采用了同样大小的时间窗口, 快速运动的目标会产生更多的事件. 因此, 图6(c)比图6(a)具有更粗的边缘或拖影.

3) 2³ 某些缺陷盘片表面可能同时具有多种缺陷, 因此表1中不同类别的总事件流数量相加之后大于116.

HTML全文

图 1 DVS缺陷成像机理说明

Fig. 1 Explanation of the mechanism of DVS-based defect imaging

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图 2 事件产生数量与光强变化大小的关系示意图 ((a) 当$\Delta t$时间内光强变化小时, 产生的事件数量少; (b) 当$\Delta t$ 时间内光强变化大时, 产生的事件数量也相应变多)

Fig. 2 Relationship diagram between the number of generated events and the magnitude of light intensity change ((a) When the change of light intensity in $\Delta t$ is small, fewer events are generated; (b) When the change of light intensity in $\Delta t$ is large, the number of generated events increases accordingly)

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图 3 缺陷检测实验平台示意图

Fig. 3 Diagram of the defect detection experimental platform

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图 4 弱小缺陷、环境倒影的成像效果对比

Fig. 4 Comparison of imaging effects of small defects and environmental reflections

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图 5 大动态范围成像效果对比

Fig. 5 Comparison of high dynamic range imaging effects

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图 6 在不同运动速度下的缺陷成像效果对比

Fig. 6 Comparison of defect imaging effects under different motion speeds

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图 7 不同缺陷类别的事件图像以及标注框的可视化结果 ((a)点痕; (b)划痕; (c)污渍)

Fig. 7 Visualization results of event images and annotation boxes for different defect categories ((a) Point; (b) Scratch; (c) Stain)

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图 8 数据集EDD-10k 统计特性

Fig. 8 Statistical characteristics of the EDD-10k dataset

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图 9 缺陷检测器的主要网络框架

Fig. 9 Main network framework of the defect detector

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图 10 基于决策级时序预测融合的后处理模块工作流程图

Fig. 10 The workflow diagram of the post-processing module based on decision-level temporal prediction fusion

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表 1 事件流在训练集和测试集中的数量分布

Table 1 Quantity distribution of event streams in the training set and testing set

类别	事件流总数	训练集事件流数量	测试集事件流数量
点痕	35	27	8
划痕	39	30	9
污渍	44	34	10
合格	4	2	2

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表 2 EDD-10k数据集中每一类缺陷标签的数量

Table 2 The number of labels for each defect category in EDD-10k dataset

类别	事件流总数	训练集事件流数量	测试集事件流数量
点痕	2865	2381	484
划痕	2159	1781	378
污渍	4070	3060	1010
合格	9094	7222	1872

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表 3 与其他算法在EDD-10k数据集上的对比实验

Table 3 Comparison experiments with other algorithms on the EDD-10k dataset

方法	mAP@0.4	AP@点痕	AP@划痕	AP@污渍
Faster R-CNN^[41]	0.210	0.000	0.536	0.095
YOLOv5	0.569	0.393	0.756	0.559
YOLOv7^[42]	0.543	0.471	0.644	0.514
RDN^[47]	0.512	0.553	0.476	0.507
MEGA^[48]	0.401	0.356	0.509	0.349
YOLOV^[49]	0.537	0.112	0.628	0.670
SSD-event^[40]	0.236	0.087	0.626	0.138
SODformer-event^[25]	0.394	0.363	0.161	0.495
TIFF-EDD	0.617	0.512	0.701	0.639

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表 4 在EDD-10k数据集上的消融实验结果

Table 4 Ablation experimental results on the EDD-10k dataset

	基线	MIFE	CTAA	VFLoss	DPF	mAP@0.4
TIFF-B	$\checkmark$					0.577
TIFF-MIFE	$\checkmark$	$\checkmark$				0.590
TIFF-CTAA	$\checkmark$	$\checkmark$	$\checkmark$			0.607
TIFF-VF	$\checkmark$	$\checkmark$	$\checkmark$	$\checkmark$		0.612
TIFF-EDD	$\checkmark$	$\checkmark$	$\checkmark$	$\checkmark$	$\checkmark$	0.617

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