本文選題：激光光條提取 + 視覺測量��； 參考：《紅外與激光工程》2017年10期

【摘要】：為實(shí)現(xiàn)大型航空零件三維測量過程中激光光條的快速高精度提取,提出了一種結(jié)合分層處理的激光光條亞像素中心提取方法。首先,根據(jù)序列圖像的結(jié)構(gòu)不變性將高分辨率圖像壓縮為低分辨圖像。接著,通過二次擬合求解低分辨率圖像中激光光條中心的法線斜率。然后,將低分辨圖像求得的法線斜率還原到高分辨激光光條圖像中。進(jìn)而通過灰度重心判斷準(zhǔn)則,快速計(jì)算激光光條的亞像素中心。最后,采用所提出的方法分別在實(shí)驗(yàn)室和大型航空零件裝配測試臺上進(jìn)行了復(fù)合材料標(biāo)準(zhǔn)樣件和復(fù)雜零件的三維形貌測量。實(shí)驗(yàn)結(jié)果表明:該方法的單激光光條重建誤差為0.269 mm,三維形面的重建誤差為0.268 mm。該方法可有效提高工程零件快速測量過程中激光光條提取精度,滿足大型航空零件現(xiàn)場測量的工程要求。
[Abstract]:In order to realize the fast and high precision extraction of laser stripes in 3D measurement of large aerial parts, a method of subpixel center extraction of laser stripes combined with delamination is proposed. Firstly, the high resolution image is compressed to low resolution image according to the structure invariance of the sequence image. Then, the normal slope of the center of the laser strip in the low resolution image is solved by quadratic fitting. Then, the normal slope obtained from the low resolution image is reduced to the high resolution laser strip image. Furthermore, the sub-pixel center of laser beam is calculated quickly by the criterion of gray center of gravity. Finally, the 3D morphologies of composite standard samples and complex parts were measured in laboratory and large aerial parts assembly test bench using the proposed method. The experimental results show that the reconstruction error of single laser strip is 0.269 mm and that of 3D shape plane is 0.268 mm. This method can effectively improve the precision of laser light strip extraction in the process of rapid measurement of engineering parts, and meet the engineering requirements of field measurement of large aerial parts.
【作者單位】： 大連理工大學(xué)機(jī)械工程學(xué)院;
【基金】：國家973計(jì)劃(2014CB46504) 國家自然科學(xué)基金(51375075,51227004);國家自然科學(xué)基金創(chuàng)新研究群體項(xiàng)目(51621064) 遼寧省自然科學(xué)基金(2014028010)
【分類號】：TP391.41;V261

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本文編號：2004299