激光与光电子学进展, 2017, 54 (12): 121502, 网络出版: 2017-12-11   

基于Fourier-Mellin变换的液晶显示屏显示缺陷检测 下载: 743次

Liquid Crystal Display Defect Detection Based on Fourier-Mellin Transform
作者单位
南京理工大学电子工程与光电技术学院, 江苏 南京 210094
摘要
针对液晶显示屏(LCD)显示缺陷检测中待测图像出现的平移和旋转导致误检率过高, 传统人工检测效率低、漏检率高, 以及图像配准精度对缺陷检测准确率的影响等问题, 提出一种基于Fourier-Mellin变换的LCD显示缺陷检测方法。基本原理是利用Fourier-Mellin变换对标准图像和待测图像进行粗配准, 通过加速稳健特征/尺度不变特征变换(SURF/SIFT)算法进行细配准, 对标准图像和配准后的图像进行加权平均融合得到最终的配准图, 最后利用局部自适应阈值分割和差影法检测缺陷, 并标注缺陷的位置及信息。实验结果表明, 提出的方法对平移和旋转的稳健性好, 能够有效地检测出LCD显示缺陷, 检测准确率达到98.667%。
Abstract
Aiming at the high false detection rate due to the image translation and rotation, the low efficiency and low reliability of manual inspection, and the impact of image registration precision on the detection accuracy, a method based on Fourier-Mellin transform for liquid crystal display (LCD) defect detection is proposed. The basic fundamental of the method is as follows. The rough matching based on the Fourier-Mellin transform is performed between the detected image and the standard image firstly, and then the fine matching based on the speed-up robust features/scale-invariant feature transform (SURF/SIFT) algorithm is performed. The weighted average fusion is used for the standard image and the image after registration to obtain the final image. The LCD defects are inspected by local adaptive threshold segmentation and subtraction method, with the defect location and information marked. The experimental results show that the proposed method is robust to image translation and rotation, and can effectively detect the LCD defects with an accuracy rate up to 98.667%.

朱炳斐, 陈文建, 李武森, 张峻乾. 基于Fourier-Mellin变换的液晶显示屏显示缺陷检测[J]. 激光与光电子学进展, 2017, 54(12): 121502. Zhu Bingfei, Chen Wenjian, Li Wusen, Zhang Junqian. Liquid Crystal Display Defect Detection Based on Fourier-Mellin Transform[J]. Laser & Optoelectronics Progress, 2017, 54(12): 121502.

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