One form of video visualisation is to transform traffic videos from a street view to an aerial view, which facilitates a summary overview of multiple traffic video streams. This paper presents an efficient and effective solution to mitigate the undesirable distortion of the retargeted vehicle objects in traffic video visualisation. This is achieved by a series of automated algorithmic steps, including vehicle segmentation, vehicle roof detection, and non-uniform image deformation by applying a

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... econd homography. This technique has been integrated into a video visualisation system that creates an aerial view of retargeted video streams on top of conventional aerial view. The results have shown that the technique offers the system a significant improvement in visual quality without undermining the requirement for realtime video visualisation.