Manifold SLIC: A Fast Method to Compute Content-Sensitive Superpixels
Manifold SLIC: A Fast Method to Compute Content-Sensitive Superpixels
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Manifold SLIC:计算内容敏感超像素的快速方法
DOI:
10.1109/cvpr.2016.77
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发表时间:
2016-06
期刊:
影响因子:
--
通讯作者:
Ying He
中科院分区:
文献类型:
--
作者:
Yong Jin Liu;Cheng Chi Yu;Min Jing Yu;Ying He
Superpixels are perceptually meaningful atomic regions that can effectively capture image features. Among various methods for computing uniform superpixels, simple linear iterative clustering (SLIC) is popular due to its simplicity and high performance. In this paper, we extend SLIC to compute content-sensitive superpixels, i.e., small superpixels in content-dense regions (e.g., with high intensity or color variation) and large superpixels in content-sparse regions. Rather than the conventional SLIC method that clusters pixels in ℝ5, we map the image I to a 2-dimensional manifold M ⊂ ℝ5, whose area elements are a good measure of the content density in I. We propose an efficient method to compute restricted centroidal Voronoi tessellation (RCVT) - a uniform tessellation - on M, which induces the content-sensitive superpixels in I. Unlike other algorithms that characterize content-sensitivity by geodesic distances, manifold SLIC tackles the problem by measuring areas of Voronoi cells on M, which can be computed at a very low cost. As a result, it runs 10 times faster than the state-of-the-art content-sensitive superpixels algorithm. We evaluate manifold SLIC and seven representative methods on the BSDS500 benchmark and observe that our method outperforms the existing methods.
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