CODEWITHSUNDEEP
matlabimage-processing
david
david

Reputation: 1265

How to obtain the union of some images in MATLAB?

I have 5 images that are some maps that are calculated by multiplying a mask in an RGB image. Now, I need to find out the union of all regions in these maps. How can I calculate it in MATLAB? When I use union in Matlab it produces a vector, but my images are 512x512x3. Could you please tell me what should I do for this? For example I have 5 images like the following image and I want to calculate the union of all these images to find all parts that users select.

enter image description here

Upvotes: 0

Views: 453

Answers (1)

Cris Luengo
Cris Luengo

Reputation: 60443

The union of two or more binary images (logical matrices) is computed using the element-wise logical OR operation (|):

mask = mask1 | mask2 | mask3;

For gray-value images use max instead:

mask = max(mask1, mask2);
mask = max(mask, mask3);

union is a function that computes the union of two sets, and is not applicable to images.

Upvotes: 1

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