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Identify connected points in a grid

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Arseny Kubryakov
Arseny Kubryakov 2015-8-12
评论： Arseny Kubryakov 2015-8-12
Dear all! I have a grid with 0 and 1. My task is to cluster connected points with 1. For example
00001100
01100001
01110101
01000001
Here there are 4 different clusters. I have create a simple code with cycle, that works fine. But it slows dramatically when I began to use it with large arrays (like 1000x1000) May be it is a simple task, but I still can not find optimal solution. Please, give me an advice.
  2 个评论
Arseny Kubryakov
Arseny Kubryakov 2015-8-12
The expected output is the consistent number of cluster at every grid point, i.e. for given example this will be
00001100
02200003
02220403
02000003

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回答（1 个）

Walter Roberson
Walter Roberson 2015-8-12
bwlabel() or regionprops()

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