i want to detecting bubble in the image and measuring the size

i used imbinarize,strel,wiener2,bwareafilt,medfilt2,filter2 and dipimage fuction

but i can't get a satisfied picture

and if i want to ftltering the range of dark (90~100) what fuction do i have to use?

Answer 1

[Wan Ji]

Use DCT transformation and with a critical bw value

I=double(imread ('image.bmp'));
I = -(I-min(I(:)))/(min(I(:))-max(I(:)));
%DCT transformation
[m,n]=size(I); 
Y=dct2(I); 
I=zeros(m,n);
I(1:floor(m/10),1:floor(n/10))=1; 
Ydct=Y.*I;
Y=(idct2(Ydct)); 
I = -(Y-min(Y(:)))/(min(Y(:))-max(Y(:)));
I (I>0.83) = 0;
I (I~=0) = 1;
imshow(I)

[chang hoon oh]

oh really appreciate it !!!!!! you are my hero~!