公开(公告)号：US20070052795A1

公开(公告)日：2007-03-08

申请号：US11219043

申请日：2005-09-02

申请人： Michael Swanger ,  John Agapiou ,  Robert Hogarth

发明人： Michael Swanger ,  John Agapiou ,  Robert Hogarth

IPC分类号： H04N7/18 ,  H04N9/47

CPC分类号： G06T7/0006 ,  G01N15/088 ,  G01N2015/0846 ,  G06T7/155 ,  G06T2207/30136 ,  G06T2207/30164

摘要： A method and system are provided for non-contact evaluation of a machined surface of a cast-metal part, including a vision-based porosity inspection station. A digital image of the machined surface is acquired, oriented and scaled to an XY coordinate system, filtered, and inverted. A second image is generated with known design surface features eliminated. Each pixel of the inverted digital image is XOR-compared with a corresponding pixel of the second image. Identified common surface features common to both images is analyzed statistically for conformance to a threshold. A defect is identified as any identified surface feature common to both images which exceeds the threshold. The system moves the part for further processing if a statistical analysis of defects indicates an acceptable component, and alternatively, removes the part from further processing if the analysis indicates a flawed component.

摘要翻译： 提供了一种方法和系统，用于对铸造金属部件的加工表面进行非接触评估，包括基于视觉的孔隙率检查台。 获取加工表面的数字图像，定向并缩放到XY坐标系，进行滤波和反转。 生成具有消除的已知设计表面特征的第二图像。 反相数字图像的每个像素与第二图像的相应像素进行XOR比较。 统计分析两个图像共同的常见表面特征，以符合阈值。 缺陷被识别为超过阈值的两个图像共同的任何识别的表面特征。 如果缺陷的统计分析指示可接受的部件，则系统移动部件进行进一步处理，或者如果分析指示有缺陷的部件，则可以将部件从进一步处理中移除。