Extraction of tumour, Dilation and Drawing a boundary around tumour

I have attached the image of a slice in which tumour is visible. I want to dilate the image and extract the tumour. After extracting the tumour I have to draw boundary around the tumour using 8 point connected components. This is the code I have tried but I am not able to get the desired output. Please help me with this problem and if possible with the proper code. g1=double(g1); g2 = im2bw(g1); s=strel('square',2); xt=imdilate(g2,s); %%% dilating to get the edge region filled properly xd=double(xt); x1=edge(xd,'canny'); %%%% finding edge so as to get 1 single line for contour extraction. figure imshow(x1) sz=size(x1); x1=double(x1);

Answer 1

[Arun Mathamkode]

You have to normalize the image before passing it into the im2bw function. Please refer to the following answer

https://www.mathworks.com/matlabcentral/answers/379119-extraction-of-tumour-dilation-and-drawing-a-boundary-around-tumour