Intersections are one of the significant factors influencing the overall traffic efficiency of road sections. This paper proposes an optimization model of signal light timing, with Travel Time Index (TTI), vehicle delay time, and queue length as optimization goals to alleviate the pressure on road traffic and enhance the traffic efficiency of intersections. Morever, a traffic signal timing control method for a single intersection is designed in this article. The proposed method realizes individual update and target optimization according to the mathematical characteristics and modifications of the sine function and cosine function, which considerably improves the timing optimization efficiency. VISSIM simulation proves that our suggested method is quite competitive. Experiments demonstrate that the average maximum queue length of the road is decrease by 23.01%, and the average waiting time is reduced by 41.86%.
External pipe weld inspection is a crucial responsibility in today's industrial manufacturing. Traditionally, the image to be detected is generated by a camera that takes images from different angles of the outer pipe and then analyses the detection frame by frame, generating a large amount of data and leading to duplicate identification. In this paper, we propose an algorithm for stitching together a panorama of external pipe welds by first acquiring a sequence of images taken 360° around the same scene, then correcting the image of the pipe column surface by the column surface inverse projection algorithm, then matching the feature points by the Flann algorithm to complete the alignment of the two images, and finally seamlessly stitching and fusing the aligned images to obtain a panorama of external pipe welds. The experimental results show that the algorithm can effectively, quickly and accurately generate a panoramic stitched image of the external pipe weld column surface, which can further provide input for weld quality analysis.
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