Supplementary Material for LiteFlowNet3: Resolving Correspondence Ambiguity for More Accurate Optical Flow Estimation

We use the tool provided in Sintel evaluation kit [1] to visualize flow fields in the main paper [2] and supplementary material. Fig. 1 illustrates the color code used in the visualization. Flow direction is encoded with color while magnitude is encoded with color intensity. Particularly, white color at the center corresponds to no visual motion. For the ease of visual evaluation, flow fields among the compared methods are normalized by the maximum flow magnitude of the ground truth (when evaluation is performed on training set) or LiteFlowNet3 [2] (when evaluation is performed on testing set) prior to the computing of flow color.