finding the area of segmented region

hi there, i need your help regarding the area of segmented region. I have to find the area of pink coloured region(denoised image) correspond to this gray scale image. would you please help to find the solution?

[Nauratul Suqda]

gray scale image inside the file . thank you in advanced for your kindness.

Answer 1

[darova]

Try this

I0 = imread('image.png');
I1 = double(I0);
imshow(I0);
h = msgbox('pick a color');
uiwait(h)
p = round(ginput(1));                   % round to integer
RGB = double( I0(p(2),p(1),:) );        % extract color
    % find color
I2 = abs(I1(:,:,1)-RGB(1)) < 10 & ...
    abs(I1(:,:,2)-RGB(2)) < 10 & ...
    abs(I1(:,:,3)-RGB(3)) < 10;
imshowpair(I0,I2)

[Nauratul Suqda]

thank you somuch for the solution .. thankk youuu

[darova]

Answer 2

[Image Analyst]

I already solved this in your duplicate question: https://www.mathworks.com/matlabcentral/answers/555355-how-to-find-the-area-for-each-regions-with-different-pixels-intensity#comment_915727

[Nauratul Suqda]

thank you image analyst for the solution. i want to ask can i find the area between contour?i still new to matlab . i try to explore . hope you can explain to me more. btw here together i embedded contour image for this particular coloured-denoised image. still i want to find the area of pink coloured region

[Image Analyst]

Threshold at the two levels and AND them, then sum the pixels

% Get larger mask
mask1 = grayImage < threshold1;
% Get smaller mask within it.
mask2 = grayImage < threshold2;
% Find out what's in the larger mask but NOT in the smaller mask inside.
ringMask = mask1 & ~mask2;
area = sum(ringMask(:))

[Nauratul Suqda]

Sir i want to ask . What would be the value for threshold1 and threshold2?

[Image Analyst]

It's whatever value the contour is at. Exactly how did you call contour() to produce that function? You must have told it what contour levels to use, didn't you? Or did you just take whatever contour() chose by itself? Again, I don't see why my answer in yoru duplicate question can't give you the area. Why are you even calling contour at all?