作者：孔小丽, 金永, 王召巴

作者单位：中北大学 电子测试技术国家重点实验室, 山西 太原 030051

关键词：光栅条纹图像处理;非均匀矫正;曲线拟合;TMS320DM6437

摘要：

为消除由LED线光源所导致的光栅条纹图像背景灰度和幅度的不一致性,提出一种以DSP(TMS320DM6437)为主要元件构建的玻璃条纹图像矫正处理系统.基于曲线拟合矫正算法,研究光栅条纹图像的矫正方法,实现对玻璃条纹图像的实时矫正,得到典型缺陷条纹图像.实验结果表明:光栅条纹图像处理系统运行稳定可靠,在该系统上实现曲线拟合矫正算法满足实时性要求,也可使矫正后的非均匀度降低,与软件求解算法相比,该系统可提高条纹图像的处理速度.

DSP implementation of nonlinearity correction method for optical grating fringe image processing

KONG Xiaoli, JIN Yong, WANG Zhaoba

National Key Lab for Electronic Measurement Technology, North University of China, Taiyuan 030051, China

Abstract: In order to eliminate inconsistency of the gray scale and scope of grating fringe image background caused by the LED light. The glass fringe image correction processing system mainly constituted by DSP(TMS320DM6437) was put forward.And grating fringe image correction method was researched to realize the real-time correction of glass fringe image. “Curve fitting” correction algorithm has the advantages of the small amount of calculation, the simply calculation formula and high accuracy. The experimental results show that the grating fringe image processing system is stable and reliable and can meet the real-time requirements for “curve fitting” correction algorithm. What's more, it can reduce the non-uniform degree after correction. Compared with the software algorithm. The speed of high stripe image processing can be improved.

Keywords: fringe image processing;nonlinearity correction;curve fitting;TMS320DM6473

2015, 41(4): 66-69  收稿日期: 2014-9-21;收到修改稿日期: 2014-11-28

基金项目: 国家自然科学基金(61201412)山西省回国留学基金资助项目(2010-5)

作者简介: 孔小丽(1989-),女,硕士研究生,专业方向为无损检测技术.

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