課題在對Trolltech公司的QT/Embedded和V4L深入分析和研究的基礎上,開發了基于Intel Pxa270的視頻監控系統。系統由視頻采集、圖像顯示、動態偵測算法、圖像截取四部分組成。
在視頻采集時使用Video for Linux接口通過ov511攝像頭對視頻實時采集,并為后期的圖像處理提供數據;對圖像的動態偵測使用幀對比算法;使用QT的 API實現對圖像的顯示,保存和系統GUI實現。
關鍵詞:幀對比算法 QT/Embedded V4L
Monitor System base on the Intel Pxa270
ABSTRACT
The topic has developed a monitor system base on the Intel Pxa270 which is on the basis of the analysis and research of QT/Embedded and video for linux(V4L).This system composes 4 parts which are video frequency gathering,video display,motion detection algorithms,take the photograph.
When video frequency gathering utilizes V4L interface connecting OV511 camera, with video frequency real-time gathering, and provides the data for the later period imagery processing. Motion detection algorithms utilize frame-difference method.The video display and image saving and system's GUI realization utilize API provided from QT.