Segmentation not working on Dicom images
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This is related to a previous question I asked before.
I want to manually segment tumors from Dicom images. I tried the code below but I get a greyish image.
metadata = dicominfo('IMG-0012-00219.dcm');
WC = metadata.WindowCenter; % original [40; 40]
WW = metadata.WindowWidth;
figure, imshow(I,[WC(1)-WW(1), WC(1)+WW(1)]);
h = drawfreehand; %draw something
M = ~h.createMask();
I(M) = 0;
The segmentation works fine, but the image is greyish which is not desirable. Any suggestions would be appreciated.
Image Analyst on 22 Nov 2022
I'm not sure what you mean by the image looks greyish. It looks like the masked blob in the middle has the full dynamic range. Do you just want to make the gray background be black? Like (untested)
grayMask = grayImage == grayImage(1,1);
grayMask = bwareafilt(grayMask, 1);
grayImage(grayMask) = 0;