Discussion on the development direction of machine vision

Text / Qian Jingye · Fawtech (Shanghai) Image Technology Co., Ltd.
Machine vision has grown from the beginning to the present, and has been around for 15 years. It should be said that machine vision as an application system, its functional characteristics are gradually improved and developed with the development of industrial automation.
According to incomplete statistics, the total global visual market is currently about 7 billion US dollars, and is growing at an annual rate of 8.8%. In China, because the degree of industrial automation has not yet reached the advanced level in foreign countries, the application of machine vision in China is still in its infancy, but with the demand for automation in the manufacturing industry and the continuous improvement of production quality and management level, China The demand for machine vision will continue to rise.
At present, machine vision is developing in two major directions, one is embedded, such as sensors and smart cameras, and the other is PC-based solutions using boards and SDKs. The two cannot be said to be superior or inferior, and they all have their own applicable occasions and applicable periods.
PC-based products using boards and SDKs have a long history. It is the concept of image processing before the development of machine vision in the industrial control field. It has continued to the present. It requires users to have a good programming foundation and a wealth of experience in field applications.
According to the development experience of foreign countries, the general price of such products plus development costs is relatively expensive, so it is generally only used in applications requiring high speed and high precision, such as the semiconductor industry.
With the development of the IC industry and the maturity of image processing algorithm technology, many software applications that require custom development in the past can now be made into embedded fixed modular products, such as sensors and smart camera products. This type of product is suitable for general applications such as the most regular shape, simple inspection items, etc.
At present, in many low-end applications, sensors and smart cameras have been greatly developed. Because it is easy to use and easy to learn, especially for system integrators, it is very beneficial for its rapid system integration project.
However, as end-users continue to grow their demand for products from appearance, internal structure, product quality to functional diversification, higher requirements are placed on the manufacturing process, making the manufacturing process from manufacturing to management in line with new requirements. The demand for the situation. Customers need more flexible applications. Both embedded systems and PC-based systems are evolving.
Embedded system products have higher processing speed and precision after applying high-speed devices, which can basically meet high-end applications, which makes embedded products can cover the needs of high, medium and low-end, thus constantly preempting the original PC-based. Market for products using boards and SDKs.
And PC-based products using boards and SDKs, the SDK has become more and more easy to use and open. They modularize the underlying algorithms of machine vision and streamline the processing of machine vision, making the whole machine vision design like “building blocks”, achieving a balance between ease of use and flexibility. Designed by professional users, it does not limit machine vision to a few specific applications.
In addition to the most common image processing methods such as filtering, image enhancement, etc., it also contains many processing modules in the field of machine vision, such as dimensional measurement calculation, edge detection, Blob analysis, etc., together with the system simulation processing environment, using these processing modules. With appropriate processing procedures for different industry applications, it is possible to develop cost-effective industrial solutions for users in a short period of time. In terms of hardware, the new system integrates image acquisition, image processing, online display, standard I/O including serial port, parallel port, keyboard and mouse, network interface, etc., and also integrates data I/O connected to external industrial control equipment. , motion control, PLC and other interfaces.
Because machine vision must be used in conjunction with industrial automation equipment, these expansion interfaces are integrated into the image processing unit, along with modular image processing software, providing users with an integrated image solution and external industrial control equipment. Achieve seamless docking.
At the same time, with the increasing management requirements of the manufacturing industry, the information management system is becoming more and more important in the manufacturing process. The machine vision system is essentially a quality inspection link, which requires the MES system and the upper management of the manufacturing process. The ERP system of the link performs data exchange. Therefore, it is more important for the user of the image processing apparatus to develop the application environment and the external interface.
It is true that the development of industrial automation in China is quite different from the developed countries such as Europe, the United States and Japan. In China's current machine vision industry environment, end users and system integrators prefer to use embedded vision systems such as sensors and smart cameras. Such systems only require a short period of training to allow users to apply and solve problems faster.
However, with the deepening of practical applications, many users have begun to feel that the embedded embedded applications are not flexible enough. Therefore, PC-based products still have reasonable rationality in the market.
According to foreign development experience, in general, embedded sensor-based visual products are mostly targeted at low-end and mid-range applications. PC-based open-type products can flexibly adapt to more because they require a certain amount of secondary development. Therefore, most of them are targeted at mid- to high-end product applications.
Of course, in China's industrial development environment, due to differences in labor costs and other factors, it may not be completely in accordance with foreign development routes and models. For example, in the local market, system integrators can use a variety of low-cost product components to develop a vision system that is consistent with the embedded product but at a lower price.
With the development of industrial automation applications in all walks of life in China, embedded products and PC-based products will coexist in the market for a long time according to the development trend of the future industry. Embedded products will integrate more functions and be more flexible. For applications, the market share will become larger and larger, and the development difficulty of PC-based products will decrease as the usability of the software package increases, and its application will be preserved in some high-speed and high-precision situations.

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