发明名称 |
GLAZING INSPECTION |
摘要 |
<p>A method of forming a shadowgraph image is described, comprising the steps of illuminating a glazing (52), e.g., a vehicle windscreen, with light from a localised light source (50), said light being expanded and collimated by a lens optical system (54) or a mirror optical system; forming a virtual shadowgraph image of the glazing in a virtual image plane (56), which may be positioned behind or in front of the glazing; and imaging the virtual image onto a CCD camera (62). The glazing may be moving relative to the light source or may be stationary. Furthermore, a method of glazing inspection is described, comprising forming a shadowgraph image as outlined above; processing the shadowgraph image to exclude measurement points corresponding to obscure areas of the glazing as non-valid measurement points; obtaining a processed image by determining an illumination value for each valid measurement point; constructing a reference image by scanning a convolution window point by point over the processed image; and comparing the illumination value of the corresponding point of the reference image.</p> |
申请公布号 |
WO2004088294(A1) |
申请公布日期 |
2004.10.14 |
申请号 |
WO2004GB01093 |
申请日期 |
2004.03.15 |
申请人 |
PILKINGTON PLC;HILL, BARRY, RAYMOND;ALDRED, SIMON, PETER |
发明人 |
HILL, BARRY, RAYMOND;ALDRED, SIMON, PETER |
分类号 |
G01N21/45;G01N21/958;G06T7/00;(IPC1-7):G01N21/896 |
主分类号 |
G01N21/45 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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