The development history of image measuring instrument

Image measurement is a measurement method that uses the image of the measured object as detection and transmission of information. Its purpose is to extract useful signals from the image and perform measurement based on image analysis and recognition. The image measuring instrument is an optical imaging system based on imaging on the photoelectric coupling device (referred to as the image system). The (image measuring instrument) is collected by the photoelectric coupling device, processed by software and imaged, displayed on the computer screen, and used measurement software for geometric A non-contact measuring instrument that calculates the final result. The measurement software extracts the coordinate points on the surface of the workpiece through digital image processing technology, and then uses coordinate transformation and data processing technology to convert it into various geometric elements in the coordinate measurement space, so as to obtain parameters such as the geometric size and shape tolerance of the measured workpiece.

In the late 1970s, especially since Professor David Marr established the theoretical framework of Computational Vision, image processing technology and image sensors have achieved rapid development. With the development and maturity of coordinate measurement technology, in the field of optical measurement based on optical comparison, the development and application of coordinate measurement methods have made further substantial progress.

In 1977, the United States invented the world's RB-1 image measurement system with the XYZ axis driven by a motor at the front desk. It is an automatic image measurement instrument that integrates video detection and software measurement with a control terminal. The appearance of these instruments opened up an important measuring instrument industry, that is, the image measuring instrument industry. In the early 1980s, there were important developments in image measurement (imaging instrument) technology. In 1981, ROI Company developed an optical imaging probe, which can replace the contact probe on the coordinate measuring machine for non-contact measurement. Since then, this optical accessory has become one of the basic components of imaging equipment. In the mid-1980s, image measuring instruments with high magnification microscope eyepieces appeared on the market.

In the 1990s, with the development of CCD technology, computer technology, digital image processing technology, LED lighting technology, DC/AC servo drive technology, image measuring instrument products have achieved tremendous development. More manufacturers have entered the image measuring instrument product market and jointly promoted the development of image measuring instrument products.