发明名称 |
METHOD FOR DETECTING OPTICAL DEFECTS IN TRANSPARENCIES |
摘要 |
A method of detecting optical defects in a transparency may comprise the steps of providing a digital image of the transparency having a plurality of image pixels and detecting at least one candidate defect. The candidate defect may be detected by determining a grayscale intensity of each one of the image pixels and calculating an intensity gradient across adjacent pairs of the image pixels. Each image pixel may be assigned a gradient value comprising a maximum of the absolute value of the intensity gradients associated with the image pixel. A gradient image may be constructed comprising the gradient values assigned to corresponding ones of the image pixels. Image pixels may be identified as candidate pixels if such image pixels have a gradient value exceeding a gradient threshold. The candidate pixels may comprise the optical defect.
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申请公布号 |
US2011235894(A1) |
申请公布日期 |
2011.09.29 |
申请号 |
US20100732798 |
申请日期 |
2010.03.26 |
申请人 |
THE BOEING COMPANY |
发明人 |
BOOKOUT RONALD L.;GLEASON MICHAEL P.;THOMAS MATTHEW M.;DIXON MICHAEL S.;PLESS ROBERT;SMART WILLIAM D. |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
代理机构 |
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