根據(jù)渦輪葉片上圓孔的特點，介紹一種快速檢測渦輪葉片上圓孔距離的方案，該方案
將采集的數(shù)字圖像輸入到計算機，根據(jù)事先給定的渦輪葉片上圓孔的模型，對圖像進行匹配，然后對匹配區(qū)域進行二值化，經(jīng)形態(tài)學(xué)處理，去除圖像上小的噪聲點，再檢測出圖像上的圓孔的大體位置，基于最小二乘原理確定圓孔的精確位置，由此得到圓孔間的距離和尺寸。此方法具有精確度高、速度快、抗干擾強的優(yōu)點。
關(guān)鍵詞：最小二乘法；圓擬合；形態(tài)學(xué)處理；相關(guān)匹配
Abstract：In terms of characteristic of apertures on turbine vane, A fast detect method which is used to measure the distance of apertures on turbine vane is introduced, First digital image is captured and input into computer, then based on model of the apertures on turbine vane which is known before, match the object area. After that for object area, finish the following steps: image segmentation, morphologic process, which is used to get ride of small wrong pixels, detecting the approximate situation of circular holes, which is based on least square method to detect the precise central coordinate of apertures. Then you can get the distance of the apertures and their sizes. This method has advantages of higher precision and rapid speed, as well as strong anti-jamming.
Key Words : least square method； circle fitting； morphologic process； relation match