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On-line character detection method based on machine vision and system thereof

A detection method and machine vision technology, applied in character and pattern recognition, instruments, computer components, etc., can solve the problems of insufficient detection ability and the inability to process in real time with general methods, and achieve fast and accurate character area positioning and efficient real-time character online The effect of detection, strong robustness

Inactive Publication Date: 2009-11-11
TIANJIN PUDA SOFTWARE TECH
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the lack of detection ability of a single recognition method in the prior art and the problem that the general method cannot be processed in real time, the present invention provides an online character detection method and detection system. Using the detection method and detection system proposed by the present invention can realize fast, High-precision character detection function

Method used

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  • On-line character detection method based on machine vision and system thereof
  • On-line character detection method based on machine vision and system thereof
  • On-line character detection method based on machine vision and system thereof

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Embodiment Construction

[0039] The invention is a universal character detection system, the hardware system is composed of a hardware part and a software part.

[0040] Such as figure 1 As shown, the hardware part is composed of camera, light source, transmission line, image acquisition card and computer. The camera lens of this embodiment adopts a linear array CCD camera. The light source is a ring light that surrounds the camera. The image acquisition card adopts an external card with image front-end processing based on the PCI bus structure of the microcomputer, and forms a relatively complete real-time image acquisition and processing system with the existing resources of the microcomputer. The camera collects real-time images, the size of which is 800×600, and sends them to the computer through the transmission line and image acquisition card for storage in BMP format and real-time detection.

[0041] The character detection system of the present invention is composed of a hardware part and a...

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Abstract

The invention belongs to the technical field of automatic detection and relates to an on-line character detection method based on machine vision. The detection method comprises a plurality of software modules including an image pre-treatment software module, a target extraction software module, a type matrix extraction software module, a character sequence mode generation software module, a character detection software module and so on. The above modules are combined together to form two independent flows including a production establishment operation flow and a character real-time detection flow. The invention synchronously provides an on-line detection system for realizing the detection method. The detection system and method provided in the invention have strong robustness, are capable of effectively reducing the influence of image variations, such as brightness, contrast, quality, character stroke, rotation, scale and the like, caused by environment or other factors, and are capable of realizing fast and correct character region location and high-efficiency and real-time charter on-line detection.

Description

technical field [0001] The invention belongs to the technical fields of computer vision, image processing and pattern recognition, and relates to an online character detection method and system. Background technique [0002] With the continuous development of large-scale and informatization of manufacturing enterprises, manufacturers have higher and higher requirements for character detection such as online product labels, and need to achieve highly accurate detection on high-speed production lines. The method of relying on manual inspection is no longer competent, and the application of high-speed and high-precision machine vision inspection can greatly improve product quality and reliability. Character detection is the use of computers to automatically identify characters on product labels or packaging. It is an important branch of pattern recognition and belongs to the category of character recognition technology. Character recognition technology has developed rapidly in...

Claims

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Application Information

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IPC IPC(8): G06K9/32
Inventor 任海燕曹金平丁学文余天洪马永发
Owner TIANJIN PUDA SOFTWARE TECH
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