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How to make the grey area completely black, so it's a binary image?

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Tawsif Mostafiz
Tawsif Mostafiz le 16 Avr 2022
Réponse apportée : DGM le 16 Avr 2022
Hi, I have a grayscale tumor image like this:
I want to make the grey area complely dark, something like this:
(This is a mask for another image)
so that the white area remailns white, but the grey area goes dark. Is it possible?

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Tala
Tala le 16 Avr 2022
Modifié(e) : Tala le 16 Avr 2022
you mean you want to have the whole tumor area white and the rest of the image black? just threshold your image
I=imread('image.bmp');
I2=I>250;
imshowpair(I2,I,'montage')

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DGM
DGM le 16 Avr 2022
The mask that was used to create the hole in the image is the binarized image. You shouldn't need to turn the source image into a copy of the mask.
but if you must:
A = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/966480/image.bmp');
A(A<255) = 0;
imshow(A)

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