Research Of Multi-Measurement Testing Technology On 2-Dimension Image Based On CCD

With the development of technology and the increment of need in usage, in the field of official automation and inspection of products' quality, there are requirements of intellectualized , high-speed and high-precision for the system of image testing and identification.In the testing and inspection field, it is required to scan large-area image by the way of high-speed and high precision to improve the efficiency and quality. In the field of products' quality inspection, it is required to test and control the product's quality accurately. If as before, human's eyes executed the quality inspection, the intention could not be achieved. But the system of machine vision can get over these disadvantages, improve production efficiency and reduce the cost of production.On the base of development trend and actual application requirement in the field of machine vision, this thesis is focused on the research of photoelectric image's two-dimension multi-measurement testing techniques based on linear CCD. The master thesis will include the following main contents:(1) To research the special digital synchronous driving technology to reduce the influence of speed changing. To realize the control of the "double-back to the zero point", which can not only realize the hight-precision testing on the direction which is perpendicular to the movement direction, but also eliminate the error created when step motor changing the direction.(2) To realize the pixel compensation with software design, which can resolve the illumination asymmetry, and eliminate the influence of optical imaging lens.(3) Aim at some discrete points after contour extraction subtracting contour tracing, a special filter is designed to eliminate these discrete points, and at the same time to keep the continuous contour.(4) A new method of multi-measurement of two-dimension optical-electric image is put forward, and the software to realize the method is easy to be extended in the later research.(5) A set of 2-dimension multi-measurment testing system is developed. The precise control of step motor, the gathering of CCD signals, the creation and save of bmp format, the digital image processing, the testing of multi-dimension are realized, to provide a opening experimental platform for further research.