CODEWITHSUNDEEP
matlabimage-processing
aceace
aceace

Reputation: 23

Area of connected region

I have a binary image from which I want to measure the area of connected white region manually, without using MATLAB functions. I have labeled the regions 

I=imread('https://i.sstatic.net/rBaua.jpg')
[Label,Total]=bwlabel(I,8);

The Label is <669x585 double> variable that has all the connected white area labeled separately, starting from 1:Total. Here is the image:

image.

Upvotes: 2

Views: 100

Answers (1)

Suever
Suever

Reputation: 65460

If you don't want to use any built-in functions, you can easily loop through the labels and compute the number of pixels with a given label.

areas = arrayfun(@(x)sum(Label(:) == x), 1:max(Label(:)));

Alternately, you could use something like accumarray or histcounts to count them for you.

areas = accumarray(Label(:)+1, Label(:), [], @numel);
areas = histcounts(Label(:), 1:max(Label(:)));

Upvotes: 1

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