Design And Implementation Of Laptop Label AOI System

With the improvement of living standards, people’s requirements to the laptop aregrowing, and pay more attention on the product quality. At present, the enterprise’s laptopproduction line use artificial way to check label quality. But, artificial visual inspectionhas low efficiency, and the test result is susceptible to human factors influence, resultingpoor quality product go into market. Customer complaints laptop’s label are not in normalcircumstances, so it’s necessary to introduce laptop label AOI system.According to the real time detection needs, the laptop label system has to breakthrough the key technical bottleneck of visual inspection system, solve traditionaldetection problem between speed and accuracy of contradictory. This system improvebilinear interpolation method, put forward a image preprocessing model, by the hardwarerealize CMOS image sensor directly convert RGB format pixel YUV422format whichcan overcome the serrated phenomenon on the image edge after interpolation appear,improve image accuracy and image processing speed. Improve SURF algorithm, proposeda method that limit image region, in the designated search range, use image’s feature pointinvariance to match feature points, realize speed up the label detection speed. And thesystem has high speed image processing module, through uncompressed the part of theinterested region, store the only interested area in the image, improve image dataprocessing speed.Laptop label AOI System through functional test in laptop production line, it canrealize24-hour online work stability and continuously, complete label detection task.Improve the detection efficiency; meanwhile, improve the label’s paste quality. Thesystem’s success running has application value on other production detection, and hascertain reference for the future development of AOI technology.