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I would like to be able to detect individual squares inside the a block and extract their coordinates,

Essentially i'm trying to create a DDR (dance dance revolution) game using opencv and kinect. To detect where the user's are stepping inside the block.

I know there are many edge detection algorithms but i'm not sure where to start.

Here is a picture of the block, I want to detect where the user is stepping (1,2,3..etc)

I would like to be able to detect individual squares inside the a block and extract their coordinates,

Essentially i'm trying to create a DDR (dance dance revolution) game using opencv and kinect. To detect where the user's are stepping inside the block.

I know there are many edge detection algorithms but i'm not sure where to start.

Here is a picture of the block, I want to detect where the user is stepping (1,2,3..etc)(1,2,3..etc) or more specifically the boundary of each square. For example, how does my program detect if the user is within the boundary of square 1 or 2 etc