Machine vision has a 15-year history of development. As an application system, its functional characteristics have gradually improved and evolved along with the development of industrial automation. Currently, the global vision market is worth approximately $6-7 billion, growing at an annual rate of 8.8%. While this figure may seem large in China at present, the demand for machine vision is expected to continue rising with the development of the manufacturing industry. I. Definition and Characteristics of Machine Vision In short, machine vision uses machines to replace human eyes for measurement and judgment. A machine vision system uses machine vision products (i.e., image acquisition devices, either CMOS or CCD) to convert the captured target into image signals, which are then transmitted to a dedicated image processing system. Based on pixel distribution and information such as brightness and color, these signals are converted into digital signals. The image system performs various calculations on these signals to extract the target's features, and then controls the equipment's actions based on the judgment results. The characteristic of machine vision systems is that they improve the flexibility and automation of production. Machine vision is often used to replace human vision in hazardous working environments where manual operation is unsuitable or where human vision is insufficient. Furthermore, in large-scale industrial production, manual vision inspection of product quality is inefficient and lacks precision; machine vision inspection methods can significantly improve production efficiency and automation. Moreover, machine vision facilitates information integration and is a fundamental technology for computer-integrated manufacturing. Because machine vision systems can quickly acquire large amounts of information, are easy to process automatically, and are easily integrated with design and processing control information, they are widely used in modern automated production processes for conditions monitoring, finished product inspection, and quality control. In China, this application is gradually being recognized, and the most direct consequence is an increasing domestic demand for machine vision. II. Current Status of Machine Vision Applications at Home and Abroad Abroad, the widespread application of machine vision is mainly reflected in the semiconductor and electronics industries, with approximately 40% to 50% concentrated in the semiconductor sector. Specifically, this includes PCB (Printed Circuit Board) manufacturing: various PCB assembly technologies and equipment; single-sided, double-sided, and multi-layer circuit boards, copper-clad laminates and related materials and accessories; auxiliary facilities, consumables, inks, chemicals, and accessories; electronic packaging technology and equipment; screen printing equipment and related materials. SMT (Surface Mount Technology): SMT processes and equipment, soldering equipment, testing instruments, rework equipment and various auxiliary tools and accessories, SMT materials, mounting plates, adhesives, fluxes, solder and anti-oxidation oils, solder paste, cleaning agents, etc.; reflow soldering machines, wave soldering machines and automated production line equipment. Electronic manufacturing and processing equipment: electronic component manufacturing equipment, semiconductor and integrated circuit manufacturing equipment, component forming equipment, electronic molds and dies. Machine vision systems have been widely used in various aspects of quality inspection, and their products occupy a crucial position in these applications. In addition, machine vision is used in various other fields. However, in China, these industries are relatively new, and the lack of widespread adoption of machine vision technology has resulted in a near-complete absence of applications in these sectors, with even those applications being limited to low-end applications. Currently in China, with the improvement of supporting infrastructure and the accumulation of technology and capital, the demand for industrial automation and intelligentization using image and machine vision technologies is emerging widely across various industries. In the past two years, domestic universities, research institutes, and enterprises have actively explored and boldly experimented in the field of image and machine vision technology, gradually beginning its application in industrial settings. Its main applications are in pharmaceuticals, printing, and mineral water bottle cap inspection. These applications are mostly concentrated in areas such as drug testing and packaging, and printing color detection. Truly high-end applications are still rare; therefore, the application space in the aforementioned related industries is still relatively large. Of course, other fields such as fingerprint detection also have good development potential. III. Future Development Trends of Machine Vision in China Among the many factors that have enabled the widespread development of machine vision, there are both technical and commercial factors, but the demand from the manufacturing industry is decisive. The development of the manufacturing industry has led to an increase in the demand for machine vision; it has also determined that machine vision will gradually develop from simply collecting, analyzing, and transmitting data to judging actions, moving towards a more open direction. This trend also indicates that machine vision will further integrate with automation. Demand determines products; only products that meet demand have a place to survive—this is an immutable law. The same applies to machine vision. In the future, the development of machine vision in China will mainly exhibit the following characteristics : 1. With the development of industrialization, the demand for machine vision will show an upward trend. The largest development space for machine vision lies in the semiconductor and electronics industries. According to relevant data from China, the global integrated circuit industry shows clear signs of recovery. At the same time, the global economic recession has given China's integrated circuit industry advantages in market share, cost, and talent return. The country has increased its planning efforts in this strategic area of ​​the integrated circuit industry. "Information technology driving industrialization" and the pursuit of a "new industrialization path" have brought huge development opportunities to the integrated circuit industry, especially for high-end and innovative products. Design, national strategic areas, 3C applications, and traditional industrial applications will become key investment areas for the integrated circuit industry in the coming years. Furthermore, China has become a major global market for integrated circuits. According to relevant data, in 2002, the demand for integrated circuits in China reached 113.55 billion RMB, accounting for 9.76% of the world market. In 2002, the total sales volume of integrated circuits in China was 28.32 billion units, and the total sales revenue was 113.55 billion RMB, representing a year-on-year increase of 26.2%. China has become a hotspot for global semiconductor investment in recent years. New IC manufacturing and packaging/testing lines are being built across many regions of China, particularly in the Yangtze River Delta. The number of IC design companies is growing exponentially each year. Guided by industrial policies, Shanghai, Beijing, Tianjin, and Shenzhen are experiencing a surge in IC investment: Motorola Tianjin has invested $1.5 billion in an 8-inch chip production line with a monthly capacity of 25,000 wafers, and SMIC Shanghai has invested $1.4 billion in a project with a monthly capacity of 42,000 8-inch silicon wafers, both already operational. Furthermore, the latest survey data from the China Semiconductor Industry Association shows that between June 2000 and August 2002, total investment in China's IC industry reached approximately 30 billion yuan, equivalent to the total investment of the previous 40 years. The number of IC design companies nationwide has quadrupled in two years, surging to 389, with 7-8 companies boasting revenues exceeding 100 million yuan. There are now about 10 professional testing companies, indicating that my country's IC testing industry is beginning to take shape. These figures demonstrate that China's semiconductor and electronics market has reached a considerable scale, and such a robust semiconductor industry will require high-quality technology as its foundation. Simultaneously, its demands for high-quality and highly integrated products will continue to increase. Coincidentally, machine vision can help them solve the above problems, making this industry the best place for machine vision to flourish. At the same time, the demand for machine vision will continue to grow. 2. Unified and open standards are the driving force for the development of machine vision. Currently, there are nearly a few machine vision product manufacturers in China. Compared with foreign machine vision products, the biggest gap between domestic products is not only in technology, but also in brand and intellectual property rights. Another current situation is that domestic machine vision products mainly rely on the agency of foreign brands, gradually moving towards independent research and development, which is a late start. In the future, the quality of machine vision products cannot be measured by a single factor, but should gradually be judged according to unified international standards. As China's automation gradually opens up, related product technologies will also gradually open up. Therefore, relying on closed technology is difficult to promote the development of the entire industry. Only by forming unified and open standards can more manufacturers develop products on the same platform, which is also the driving force for promoting the internationalization of China's machine vision. 3. Embedded products will replace board-based products. From the product perspective, machine vision will increasingly rely on PC technology, and its integration with data acquisition and other control and measurement methods will become closer. Furthermore, embedded products will gradually replace board-based products, a continuously growing trend. The main reason is that with the rapid development of computer and microelectronics technologies, the application fields of embedded systems are becoming increasingly widespread, especially their low-power consumption characteristics, which have gained significant attention. In addition, most embedded operating systems are based on the C language, making C high-level language development a fundamental task. The advantages of using high-level languages ​​include improved work efficiency, shorter development cycles, and, more importantly, higher product reliability, better maintainability, and ease of continuous improvement and upgrades. Therefore, embedded products will replace board-based products. 4. Standardized, integrated solutions will also be an inevitable path for machine vision. Furthermore, since machine vision is part of automation—without automation, there would be no machine vision—machine vision hardware and software products are gradually becoming core systems at different stages of collaborative manufacturing. Both users and hardware suppliers use machine vision products as tools for information collection on the production line. This requires machine vision products to adopt "standardized technologies," which, simply put, means becoming increasingly open as automation expands, allowing for secondary development based on user needs. Today, automation companies are advocating integrated hardware and software solutions. Machine vision manufacturers, in the next 5-6 years, should move beyond simply being product suppliers and gradually become system integrators providing integrated solutions. In the coming years, with the development of China's manufacturing industry, the demand for machine vision will gradually increase. With the increase in machine vision products and the improvement of technology, the application of machine vision in China will shift from low-end to high-end. Due to the intervention of machine vision, automation will develop towards a more intelligent and faster direction. Furthermore, because user needs are diverse and vary in level of requirements, personalized solutions and services will become increasingly important in the competition. Replacing standardized products with specially customized products is also a future trend in machine vision development. The application of machine vision will further promote the intelligent development of automation technology.