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Is there any method to calculate segmentation coefficent automatically according the same size of my boundary area.

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Ali Zulfikaroglu
Ali Zulfikaroglu on 6 Jan 2021
I have a breast mammogram image.
you can see on files , image 1 show boundary of tumour suspicious area(inside red circles)
I made segmentation with using im2bw function and with segmentation coefficient number 0.75
and I got second image.
But when I use 0.63 segmentation coefficient number, I got closer size of in my first image's bounding circles.
But I am trying this every step and every step to get closest size with my bounding size
I mean I am trying many coeefficient number to get closest size of segmentation tumour with the my first image's inside bounding circles size tumour.
How will I calculate coeefficient number automatically or easier way ?
img=imread('image.jpg');
A=im2bw(img,0.75);
figure,imshow(A);
B=im2bw(img,0.63);
figure,imshow(B);

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