| By analyzing the development and situations of ceramic-nick inspecting system home and abroad, this thesis shows an embedded automatic ceramic-nick inspecting system. The system based on ARM microprocessor, and it gets image data which will be stored in ARM with a CMOS camera, and then carries out a series of processing, including image preprocessing, edge detection, image smoothing, image binaryzation, automatic recognition. Finally, it detects the ceramic whether has nick or not by calculating some parameters which will be showed. If the ceramic has nick, the image will be transported from the device to main controlling computer.Firstly, the hardware design and the set up of software platform are put forward and discussed. Secondly, the thesis makes a study of digital image processing technology. Some important algorithms has been analyzed in detail, and simulated with Matlab, at the same time, algorithm of Prewitt functor which is used in edge detection has been improved to reduce calculated amount of image processing and has satisfied the demand of Real-Time of the detecting device. Finally, this thesis discussed the software design of system in detail, which is hardcore of the thesis, including capturing image, inspecting ceramic-crack, the design of buttons and display, communication module and so on.Result of this research was provided with great signality of practical engineering and a valuable reference for ceramic-nick inspecting. |
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