Algorithm 2 Faster Mean-shift Clustering

$$\begin{array}{cc}\hfill & \mathrm{Input}:h:\text{Bandwidth};S:\text{Vector set};\hfill \\ \hfill & \mathrm{Output}:\mathbf{x}-\mathit{modes}:\text{A vector-modes list}\hfill \\ \hfill & 1:\#\text{Seed Selection}\hfill \\ \hfill & 2:\text{Evenly random select seed vector set}{S}_{\mathit{seed}}\in S\hfill \\ \hfill & 3:\#\text{Parallelization with GPU}\hfill \\ \hfill & 4:\mathbf{for}{\mathbf{x}}_{\mathit{seed}}\in S_{\mathit{seed}}\mathbf{do}\hfill \\ \hfill & 5:\mathbf{while}{\mathbf{x}}_{\mathit{seed}}\text{not converge}\mathbf{do}\hfill \\ \hfill & 6:{\mathbf{x}}_{\mathit{seed}}\leftarrow m({\mathbf{x}}_{\mathit{seed}})\cdot k_h({\mathbf{x}}_{\mathit{seed}},{\mathbf{x}}_i)\hfill \\ \hfill & 7:\mathbf{end}\mathbf{while}\hfill \\ \hfill & 8:\mathit{modes}\text{append}{\mathbf{x}}_{\mathit{seed}}\hfill \\ \hfill & 9:\mathbf{end}\mathbf{for}\hfill \\ \hfill & 10:\text{Prune}\mathit{modes}\hfill \\ \hfill & 11:\mathbf{for}\mathbf{x}\in S\mathbf{do}\hfill \\ \hfill & 12:\text{Cluster}\mathbf{x}\text{by the distance to}\mathit{modes}\hfill \\ \hfill & 13:\mathbf{end}\mathbf{for}\hfill \end{array}$$