摘  要：針對熔池及熔池前區相連焊縫的雙靶面成像系統，采用特征基點標識及基于空間變換的方法，建立雙靶面成像系統的圖像配準模型。在圖像配準模型中應用最小二乘法確定配準模型中的參數，并通過實驗證明該方法能夠快速、準確地實現圖像配準并應用到實際的雙靶面成像系統中去，為實現焊接過程中熔池相對焊縫中心偏離量的監測創造條件。

關鍵詞：特征基點；雙靶面成像；圖像配準；最小二乘；空間變換

文獻標志碼：A       文章編號：1674-5124（2015）12-0095-05

Image registration of double target surface imaging system based on

spatial alternation

BI Qilin1， WANG Qiteng2， QUAN Yanming2

（1. Guangdong Institute of Automation，Guangzhou 510070，China；

2. School of Mechanical and Automotive Engineering，South China University of Technology，

Guangzhou 510640，China）

Abstract: An image registration model has been developed for double target surface imaging system of molten pools and weld joints based on feature point identification and space transformation. Least squares were used to determine model parameters. Experiments show that the method can realize image registration in a swift and accurate manner and can be applied in actual double target surface imaging systems， thus providing conditions to monitor the deviation vector of molten pools relate to weld centers in welding processes.

Keywords: basic characteristic points； double target surface imaging； image registration； least squares； spatial alternation