Research Of Real-time Red Light Runners System Based On DaVinci

The system of Red Light Runner uses many technologys about computer vision and digital image processing.This paper researched two key algorithms,target detection and tracking and basically set up frame system of red light runner based on DaVinci technology.Vehicle detection and tracking are key algrithoms of the red light runner system.For vehicle detection,traditional algorithms can't extract an accurate background.Especially when target appears in high density,backgroud can't be reconstructed.Based on above issues,this paper proposed a kind of algorithm to reconstruct background based on morphological knowledge and pixel intensity classification. The main idea of this algorithm: Firstly,the method get rough outline of target through three frame images,then process the image to differentiate the accurate target and background in the method of mathematical morphology.And,we only classifies the background of pixel vlaue and neglect pixel of target to reduce the infulence on background reconstruction,and.After all video finish,we statistics the number of times that pixel value appears,and consider the biggest is the pixel of background.For target tracking,traditional Mean Shift algorithm has two limatitions,one is that it can not set target window automatically,and it will lose target when color distribution of target and background is similar.This paper propose a algorithm for moving vehicles based on Mean shift combined with Kalman filter,which can set target window automatically and forcast the possible position of the moving object in this frame according to the position of object in last frame.it use the movement information of the last frame that Mean Shift didn't use,therefore it can track target more accurately. We simulate these two modified algorithms and the result proves it can realize vihelcel detection and tracking.TI DaVinci techonology is desiged for developing digital video system,whose technical characteristics and development tools can quickly bring it into digital video applications.DM6446 is a SOC processor based on DaVinci techonology.It has a ARM+DSP dual-core architecture,which integrates memory,peripherals and nuclear with programmable function.DSP can execute algorithm well and ARM can manage peripherals with Linux operation system.That is why this paper chose DM6446 as our develop platform.Firtly,we should package underlying algorithm library for object detection and tracking based on DSP end,and then,we should complete desiging multithread application program on Linux based on ARM end.On this basis,we set up a demo system with the features of video capture,coding,decoding, and network transporting.