i used marker controlled watershed segmentation algorithm to segment the image into diff colors.i want to count the no.of segments in the segmented image

i used marker controlled watershed segmentation algorithm to segment the image into diff colors.i want to count the no.of colors in the segmented image

Answer 1

[Gautam]

Hello @madhuri kalapala

To count the number of distinct colors in a segmented image after using the marker-controlled watershed segmentation algorithm, you can follow these steps in MATLAB:

1. Convert the Image to Indexed Format: This will help in identifying unique colors.
2. Identify Unique Colors: Count the unique colors in the indexed image.

Here's an expamle

segmentedImg = imread(segmentedImage);

% Convert the segmented image to an indexed image
[~, ~, numColors] = unique(reshape(segmentedImg, [], size(segmentedImg, 3)), 'rows');

% Count the number of unique colors
numUniqueColors = length(unique(numColors));

The variable "numUniqueColors" gives the number of coloured segements