Ant Colony Optimization Approaches to Clustering of Lung Nodules from CT Images

Algorithm 2

Watershed algorithm.

Input: Lung CT image.

Output: Edge detected image using Watershed algorithm.

begin

 convert image into binary image

 compute the euclidean distance transform of the binary image

 identify the watershed regions from the image

 for each watershed region

  label each pixel with an value

  label with value 0 indicates it doesnot belong to unique threshold region

  watershed pixels are pixels with value 0

 end for

 create a sobel horizondal filter

 filter the input image with the sobel filter to get the regions.

end