摘 要：針對(duì)熔池及熔池前區(qū)相連焊縫的雙靶面成像系統(tǒng)，采用特征基點(diǎn)標(biāo)識(shí)及基于空間變換的方法，建立雙靶面成像系統(tǒng)的圖像配準(zhǔn)模型。在圖像配準(zhǔn)模型中應(yīng)用最小二乘法確定配準(zhǔn)模型中的參數(shù)，并通過實(shí)驗(yàn)證明該方法能夠快速、準(zhǔn)確地實(shí)現(xiàn)圖像配準(zhǔn)并應(yīng)用到實(shí)際的雙靶面成像系統(tǒng)中去，為實(shí)現(xiàn)焊接過程中熔池相對(duì)焊縫中心偏離量的監(jiān)測(cè)創(chuàng)造條件。
關(guān)鍵詞：特征基點(diǎn)；雙靶面成像；圖像配準(zhǔn)；最小二乘；空間變換
文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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
