Detection method of the LGP warpage degree based on edge detection evaluation function

摘要

Because of the shortage of rule gap measurement for light guide plate (LGP) warpage degree, image definition criterion of qulity indexing is present based on single CCD camera The detection paper and LGP are respectively arranged on the camera detection device platform, located by X- and Y-axesd rivingunitand focused by Z-axis driving unit firstly, different image definition criterion peaks of edge detection evaluation function are obtained in the middle surface of LGP bottom and surface. Finally, different edge detection algorithms are compared under different situations. Results show that the algorithm has good repetition and can meet the online, untouched detection needs.