Application of machine vision technology in security field

The development prospects of machine vision
: Machine vision can be used to complete tasks that are difficult to achieve manually, especially in systems that require high speed and high precision. For example, electronic manufacturing, automobile manufacturing, packaging and printing, chemical industry, energy, processing machinery and other industries are all users or potential users of machine vision. On the one hand, from the international market, the largest application field of machine vision is semiconductor electronics manufacturing. China has now become a major manufacturing base. More than half of the world's mobile phones are made in China. Many semiconductor companies have production plants in China. These companies require a large number of machine vision systems. On the other hand, China's industrial production is shifting from relying on cheap labor to a higher degree of automated production, which has also brought about a large demand for automated equipment. In addition, China's early industrial equipment generally had a low degree of automation and required a lot of upgrading, which created a huge market demand for automation equipment including machine vision. 

In the transportation industry, compared with other identification technologies, machine vision has the advantages of low cost, strong stability, high accuracy, and wide range of applications. It has been widely used in traffic monitoring systems for highways and highways at home and abroad. , such as license plate recognition, body color recognition, vehicle model recognition, violation recognition, traffic flow statistics, flow control, etc.
Binocular/multi-eye stereo vision: Binocular stereo vision technology is based on the principle of parallax, and uses imaging equipment to obtain two images of the measured object from different positions, and obtains the three-dimensional geometry of the object by calculating the position deviation between corresponding points in the image. information method. The core purpose of binocular stereo technology is to improve the accuracy of recognition. Since the field of view formed by stereo vision technology contains three-dimensional geometric information of objects, it can effectively set detection rules, eliminate interference factors such as light and shadow, and greatly improve Accuracy of intelligent analysis. Using dual cameras or multiple cameras, the three-dimensional position coordinates and attitude of free movement in the field of view can be measured with high precision, and the moving target can be tracked with high precision based on the calibration results. Since binocular/multi-eye stereo vision can identify the target's three-dimensional coordinates, posture, relative distance, and spatial distance from the background environment, it can adapt to complex tracking background environments.

Instrument reading acquisition and monitoring: At present, instruments are mainly divided into pointer instruments and digital display instruments. Pointer instruments are simple and reliable, easy to maintain, and low in price. Not only are there many types, but they are also large in quantity, such as pressure gauges, dial indicators, dial indicators, automotive instruments, aviation instruments, etc. Digital display instruments have accurate and convenient readings and high measurement speed. quick. In some cases, it is necessary to monitor the readings of these meters. This is undoubtedly a boring and tiring job for the inspectors. Affected by human subjective factors such as human observation angle, observation distance and fatigue intensity, the error may be large, the reliability is not high, the verification efficiency is low, and the labor intensity is high. The digital display instrument reading technology of machine vision is a technology that realizes the interconnection, integration and monitoring of various digital display instruments, and facilitates the integration of management and control.