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A fast and optimized dehazing algorithm for hazy images and videos is proposed in this work. Based on the observation that a hazy image exhibits low contrast in general, we restore the hazy image by enhancing its contrast. However, the overcompensation of the degraded contrast may truncate pixel values and cause information loss. Therefore, we formulate a(More)
(a) t = 0 (b) t = 5 (c) t = 15 (d) t = 30 (e) t = 70 (f) t = 200 Figure 1: Double random walkers with the repulsive restart rule. Red and blue walkers move interactively to divide a point set into two clusters. The top two rows depict the probability distributions of the red and blue walkers, and the bottom row shows the clustering results. The clustering(More)
An efficient coding algorithm for depth map images and videos, based on view synthesis distortion estimation, is proposed in this work. We first analyze how a depth error is related to a disparity error and how the disparity vector error affects the energy spectral density of a synthesized color video in the frequency domain. Based on the analysis, we(More)
An accurate quality metric, called GEQM, for gray-level edge maps based on the structural matching of edge pixels is proposed in this work. We design the positional matching cost, which reflects the distance between two edge pixels, and the structural matching cost, which measures the structural shapes of edges as well as the differences of edge strength(More)