光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2010年
5期
63-69
,共7页
赵晶晶%白瑞林%李杜%孟伟%温振市
趙晶晶%白瑞林%李杜%孟偉%溫振市
조정정%백서림%리두%맹위%온진시
光轴垂直度%计算机视觉%亚像素%相机成像
光軸垂直度%計算機視覺%亞像素%相機成像
광축수직도%계산궤시각%아상소%상궤성상
optical axis verticality%computer vision%sub-pixel%camera imaging
为了提高二维视觉测量的精度,本文提出了一种嵌入式机器视觉光轴与物面垂直度调节的新方法(面积法).该方法将立体成像原理与数字图像处理结合,采用Harris算子与空间矩结合提取特征点亚像素坐标,利用海伦公式计算特定区域的面积,再根据相机镜头与被测物相对倾斜时特定区域的面积变化规律,准确的判断光轴与物面垂直度.实验证明,该方法操作简单,稳定性好,实用性强,能够很好的提高二维视觉测量的精度.该方法已应用在嵌入式机器视觉工业现场.
為瞭提高二維視覺測量的精度,本文提齣瞭一種嵌入式機器視覺光軸與物麵垂直度調節的新方法(麵積法).該方法將立體成像原理與數字圖像處理結閤,採用Harris算子與空間矩結閤提取特徵點亞像素坐標,利用海倫公式計算特定區域的麵積,再根據相機鏡頭與被測物相對傾斜時特定區域的麵積變化規律,準確的判斷光軸與物麵垂直度.實驗證明,該方法操作簡單,穩定性好,實用性彊,能夠很好的提高二維視覺測量的精度.該方法已應用在嵌入式機器視覺工業現場.
위료제고이유시각측량적정도,본문제출료일충감입식궤기시각광축여물면수직도조절적신방법(면적법).해방법장입체성상원리여수자도상처리결합,채용Harris산자여공간구결합제취특정점아상소좌표,이용해륜공식계산특정구역적면적,재근거상궤경두여피측물상대경사시특정구역적면적변화규률,준학적판단광축여물면수직도.실험증명,해방법조작간단,은정성호,실용성강,능구흔호적제고이유시각측량적정도.해방법이응용재감입식궤기시각공업현장.
To improve the accuracy of two-dimensional vision measurement,a new area method of verticality adjusting between optical axis and object surface of Embedded machine vision controller is proposed.The method based on 3-D imaging principle of cameras and image processing,uses Harris comer detector and spatial-moment to detect subpixel feature point.and adopts Heron Formula to calculate the special area.Then,according to the variable area rule of the relative tilted between camera lens and measured objects,the method can accurately judge the verticality between optical axis and object surface.Experiments demonstrate that the advantages of the proposed method are simple operation, stability and practicability.The measurement precision could be greatly improved by adjusting.The adjusting method has been applied in the industrial field of Embedded machine vision.