Segmentation. Methods Region Growing Split and Merge Clustering.

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Presentation transcript:

Segmentation

Methods Region Growing Split and Merge Clustering

Region Growing

Split and Merge Assume that all pixels within regions I 1, I 2 and I 3 respectively are similar but those in I 4 are not. Therefore I 4 is split.

Split and Merge After comparing the split regions, regions I 43 and I 44 are found to be identical. These are thus merged together.

Clustering using K-means There are K clusters, C 1 … C k with means m 1 … m k. Least-square error Minimize D.

Pseudo code for k-means

Clustering using K-means

Example

K-means

EM

Expectation

Maximization

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