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How Can I do image extraction of chosen region?

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I have an mammogram image . I use roipoly command to draw tumor suspicious area . Maybe something easier ways to draw that blue polygon.
My question is I need to extract that blue polygon tumor suspicious region from original image and then I will segment that extracted image.
How Can I do that ?
(The image was taken from mias database).

Accepted Answer

Image Analyst
Image Analyst on 29 Dec 2020
Once you have the mask, do this:
% Mask the image using bsxfun() function to multiply the mask by each channel individually.
% Works for gray scale as well as RGB Color images.
maskedImage = bsxfun(@times, rgbImage, cast(mask, 'like', rgbImage));
changing the names to whatever you want to call them.
  12 Comments
Ali Zulfikaroglu
Ali Zulfikaroglu on 6 Jan 2021
Thank you really image analyst . I added your function bsxfun and got the result which I want.

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More Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 29 Dec 2020
Edited: KALYAN ACHARJYA on 29 Dec 2020
Steps:
  • Draw
  • Right Click (Cursor above the Drawing)
  • Create Mask
  • Save the Mask
  3 Comments
Ali Zulfikaroglu
Ali Zulfikaroglu on 30 Dec 2020
Thank for your suggestion also, image analyst answer works

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