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how can i use clarity factor with gaussian kernel in image processing

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chang hoon oh
chang hoon oh 2021년 9월 16일
댓글: Image Analyst 2021년 9월 23일 14:46
i apply the gaussian gradient kernel to image for bubble detection
after that i trying to find the clarity of image and remove out of focused bubble. like this article
at the part 3.2.
but i can't find the code for clarity in matlab. so i use the binarize fuction and threshold but it didn't work perfectly so i want to find how i can use
clarity of the image
can anyone help me?
this is my cord
C3 = imcomplement(C1);
BWdfill = imfill(Bi,'holes');
% imshow(MU);
BWdfill=imcrop(BWdfill,[299 0 687 796]);
% imshow(BWdfill);
se = strel('disk',2);
ie = imerode(BWdfill,se);
ie = imerode(ie,se);
ie = imerode(ie,se);
% ie = imerode(ie,se);
% ie = imerode(ie,se);
id =imdilate(ie,se);
id =imdilate(id,se);
id =imdilate(id,se);
% id =imdilate(id,se);
% id =imdilate(id,se);
[centers,radii] = imfindcircles(id,[3 80],'ObjectPolarity','bright','Sensitivity',0.85);
viscircles(centers, radii,'Color','b');

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Image Analyst
Image Analyst 2021년 9월 18일 16:51
Looks like they define clarity as the max of the gradient in each floc blob:
"The maximum value of Ig associated with each floc i is a
quantitative measure of how close to the plane of focus a given
floc is, and this value is defined here as the ‘‘clarity value’’ a
a(i) = max(Ig(ROI(i))
A threshold......"
  댓글 수: 2
Image Analyst
Image Analyst 2021년 9월 23일 14:46
It's possible expecially if the bubble had a smooth exterior boundary and is smooth inside. I'd try adjusting parameters like the window side and threshold level.

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