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Globally exponential stability (which implies convergence and uniqueness) of their classical iterative algorithm is established using methods of heat equations and energy integral after embedding the discrete iteration into a continuous flow. The stability condition depends explicitly on smoothness of the image sequence, size of image domain, value of the regularization parameter, and finally discretization...
Vision-based Lane Departure Warning Systems (LDWSs) have been studied for over two decays. This paper presents an Objective Evaluation Platform of LDWS (OEP-LDWS). It provides simulated road scenes with the possible data as ground truth, such as the vehicle to road relation, vehicle's states and the real Time-to-Lane-Crossing (TLC) value. In our OEP-LDWS, different kinds of driving maneuver can be...
Vision-based lane detection is still a challenging task in real application with a variety of complex road scenes. What makes the problem even more difficult is the requirements of real time implement with on-board processor. To speedup the lane detection processing, the Region-of-Interesting (ROI) method was widely used to narrow the candidate searching range for local road features. In this paper,...
A novel adaptation-based recursive Retinex algorithm is proposed in this paper. The recursive scheme works in a similar way to the first recursive Retinex algorithm proposed by Frankle and McCann. Simulating the spatial response of retinal photoreceptors, the pixel level adaptation is implemented instead of the ratio-product operations. Thus the dynamic range is compressed efficiently without altering...
Vision based lane detection is an essential task in both autonomous land vehicles research and active safety system development. The straight lines in the image are always corresponding to the lanes to be detected, especially in the near front of the vehicle. Thus Hough transform is employed to extract lanes form the edge map of the road scenes, plenty of linear structure staffs, however, may appear...
This paper proposes an improved recursive retinex algorithm based on the McCann-Sobel algorithm for rendering high dynamic range photographs. In McCann-Sobel algorithm, the translation operations in various directions were taken sequentially. The influence on the central pixel from different directions would be different. This causes an asymmetric estimation of the illumination. In this paper, this...
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