超像素 superpixels 是什么東西

畢業設計要做圖像分割 識別什么的。

看論文看到 superpixels 開始腦補是  像素插值算出來的

后來越看越不想，搜索發現根本是另外一回事

http://blog.sina.com.cn/s/blog_50363a7901011dtd.html 

有定義

 

Many existing algorithms in computer vision use the pixel-grid as the underlying representation. For example, stochastic models of images, such as Markov random fields, are often defined on this regular grid. Or, face detection is typically done by matching stored templates to every fixed-size (say, 50x50) window in the image.

The pixel-grid, however, is not a natural representation of visual scenes. It is rather an "artifact" of a digital imaging process. It would be more natural, and presumably more efficient, to work with perceptually meaningful entities obtained from a low-level grouping process. For example, we can apply the Normalized Cuts algorithm to partition an image into, say, 500 segments (what we call superpixels).

低級特征分組處理的結果 就叫做 superpixels

(a)	(b)
(c)	(d)

 a是待處理圖片，b是人類的視覺分割，c是superpixel map，d是根據c新做的人類視覺分割

 

其方法有多種

http://blog.sina.com.cn/s/blog_6f126f5b010134a3.html 方法簡介