| 摘要 |
<p>A web inspection system (300) provides detection of web flaws along the machine direction and cross direction of a web. The detectable percent contrast between good web material and bad web material in one embodiment approaches noise level. The web inspection system (300) utilizes a multiple of smart cameras (302, 330) connected to a host computer (332) via an ethernet hub (328). Each smart camera (302, 330) includes a line scan camera (304) for producing digital pixels, a means for lighting and pixel correction (306) on a pixel by pixels basis, a web edge detector (308) for monitoring the edges of a web, a multi-pipeline flaw detection pre-processor (310) for detecting very small changes in the web material, a run length encoder (312) for generating data regarding the location of each group of potential flaws in a cross direction, a 2D blob detector (316) and analyzer (320) for generating data regarding the location of block flaws along a machine direction, and an inspect/reject analysis (324) for determining the actual flaw data from the potential flaw data.</p> |
