Digital meter recognition system and method based on vision

Abstract

The invention discloses a digital meter recognition system and method based on vision. The system comprises a digital meter, a vidicon for collecting dial plate images of the digital meter and a PC for image digital recognition. The vidicon is connected with the PC through a USB interface or an image collecting card. The vidicon collects digital meter images and uploads the digital meter images to the PC. The PC carries out image preprocessing, image character segmentation and character tilt correction on source images in sequence, and finally a BP neural network template is used for character recognition. In the character recognition, according to the structure features of seven sections of digitrons, seven-feature scanning is carried out, and high recognition rate can be achieved through small calculated amount; the character images are subjected to character tilt correction, extracted recognized features are matched with the template, and the accuracy of character recognition is improved; and the recognition method based on a BP neural network with an on-line training function is used, the stability of a recognition algorithm is enhanced, and robustness is improved.

Description

technical field [0001] The invention relates to a vision-based digital instrument recognition system and its recognition method, which belongs to the technical field of image recognition. Background technique [0002] There are many uses of image processing. In addition to enhancing visual effects, it is more often used for image recognition. With the digitalization of technology and the development of intelligence, image recognition is more and more used in industry, military and daily life. As an emerging subject, image processing develops very rapidly. [0003] In industrial production and daily life, digital instruments are widely used in various fields due to their advantages of high precision and easy reading and writing. For instrument data, there are currently two main processing methods: [0004] (1) Traditional manual manual recording. For many old-fashioned instruments or instruments lacking data output interfaces, it takes a lot of manual work to record their...

AI Technical Summary

Problems solved by technology

With the development of science and technology, some instruments not only have digital display, but also have data interface. When the instrument is working, a large amount of data can be transmitted through the data interface, but this will undoubtedly increase the cost of the instrument. At the same time, for different instruments The digital interface of the equipment and the data processing terminal need the corresponding interface driver and working software to maintain the normal reception of data, and it is difficult for different types of instruments to communicate with each other

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