How to detect objects in images using ROI

I want to detect physical changes in the image and display the changes using the ROI method.

1. Picture 1 shows the original image

2. Picture 2 shows the physical changes

And I hope the result is like the following image

Answer 1

[Shreeya]

From the given image, I'm assuimg that you want to apply a median filter on your image for noise removal, followed by segmentation using K-means clustering algorithm and thresholding.

• For 2D median filtering, you can use the "medfilt2" function. Refer to the documentation here: https://www.mathworks.com/help/images/ref/medfilt2.html
• For segmentation using K-means clustering, you can use the "imsegkmeans" function. You can tune the number of clusters according to your use case. Refer to the documentation here: https://in.mathworks.com/help/images/ref/imsegkmeans.html
• Next, the tumor can be detected by applying binary thresholding. This can be achieved using the "imbinarize" function. Refer to the link here: https://www.mathworks.com/help/images/ref/imbinarize.html