| With the great development of network technology, communication technology and digital multimedia technology, digital and network and intelligent is becoming an important research content for designing video monitoring system. This thesis proposes an image monitoring system of general solution, and designs a video monitoring system for the purpose. The whole design based on the research of video code technology, digital image technology.The paper uses TI Company’s TMS320DM642DSP which has strong processing capability, flexible external interfaces and completed development tools, mainly studies the image compression and coding based on DSP, finished image collection, compression and transmission module design of the software and hardware, constructing the plant disease monitoring system. The system hardware parts including image acquisition module, DM642type DSP core modules, the external storage module, logic control module and network transmission module.The system collects video information by CCD, DM642gets converting digital signal processor through video decoder, and then TMS320DM642DSP chip uses multimedia technology of wavelet for image compression coding, Uses the embedded foreigner wavelet compression algorithm, and write program of compressed image through the network for transmission. In the PC via Ethernet won the compressed image of crops, and through the analysis of image quality, transmission, the higher the quality of compressed image quality is higher. At the same time the monitoring center of crop diseases image identification, analysis of disease control.This thesis expressly expatiates hardware selection and interface technology between modules. Finally, the thesis has given a summarization to the fundamental research and experimentation, proposed to transmit data by wireless transmission and has put forward the further research work for the video monitoring system. |
