Portable terminal for real time acquiring and displaying image based on ARM

Abstract

The invention relates to a portable image real-time collecting and displaying terminal based on ARM. Its technical proposal is as follows: CCD camera is connected through a USB interface with an ARM; a data terminal and an address terminal of the ARM are respectively connected with the data terminal and address terminal corresponding to an FLASH module, a SDRAM1 module and a SDRAM2 module; a video data terminal and a video control terminal of the ARM are connected with the data terminal and video control terminal corresponding to an LCD module; the ARM is connected through the USB interface module with an outer memory; the ARM is connected through an Ethernet module with a network apparatus. The invention adopts an embedded LINUX technology and compiles an image collecting program using corresponding programming interface function of LINUX kernel, uses the double-buffer memory technology of image data and the method of mapping the display buffer field of the LCD module to an user memory field so as to realize the real-time display of image in the LCD display module. The system has advantages of rapid processing response speed, small volume, and low power consumption etc.

Description

technical field [0001] The invention belongs to the technical field of embedded image acquisition. In particular, it relates to an ARM-based portable image real-time collection and display terminal. Background technique [0002] With the development of information technology, video technology has been widely used in industrial control, intelligent transportation and other fields. The common method of image acquisition and display is to process and display the video information obtained by the CCD camera on the PC. Although this method is easy to implement , but the cost is high, the volume is large, and it is not convenient to carry. [0003] At present, the vast majority of vision systems are composed of PCs, image acquisition cards, and CCD cameras. The software design is based on the software architecture under the window platform, which makes the image acquisition system bulky and inconvenient to move. For example, "Intelligent Control System of Complex Industrial Prod...

AI Technical Summary

Problems solved by technology

[0002] With the development of information technology, video technology has been widely used in industrial control, intelligent transportation and other fields. The common method of image acquisition and display is to process and display the video information obtained by the CCD camera on the PC. Although this method is easy to implement , but the cost is high, the volume is large, and it is not convenient to carry

[0003] At present, the vast majority of visual systems are composed of PCs, image acquisition cards, CCD cameras, etc. The software design is based on the software architecture under the window platform, which makes the image acquisition system bulky and inconvenient to move

For example, "Intelligent Control System of Complex Industrial Production Process Based on Vision" (Zhang Yong, Dong Jiwen, Chen Yuehui, Control Engineering, School of Information Science and Engineering, Jinan University, 2004.3) is composed of a PC, two color CCD cameras and image acquisition cards; "High-speed Video Acquisition System" (CN1684024), adopts USB interface to realize the transmission of image data, although this image acquisition system can realize high-speed real-time acquisition, but because its image acquisition and transmission program is based on the Windows operating system, the volume of the acquisition system big, not easy to move

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