MATLAB: How to create rounded edges of an irregular object? I want to smoothen the corners of this object.
image processingMATLABmatlab 2019a
Related Solutions
kumara, try this. Adapt parameters as needed to control the size and amount of the blur.
% Demo to blur edges of rectangles, but not the insides.
clc; % Clear the command window.
fprintf('Beginning to run %s.m ...\n', mfilename);close all; % Close all figures (except those of imtool.)
imtool close all; % Close all imtool figures.
clear; % Erase all existing variables.
workspace; % Make sure the workspace panel is showing
fontSize = 15;% Get image.
grayImage = abs(randn(224,224)+50);m =2*abs(randn(90-10+1,60-10+1)+22); %first rectangle
grayImage(10:90, 10:60) = m; m1 =3*abs(randn(110-95+1,60-10+1)+19); %second rectangle
grayImage(95:110, 10:60) = m1; [rows, columns, numberOfColorChannels] = size(grayImage)subplot(2, 2, 1);imagesc(grayImage)impixelinfo; % Let user see RGB values as they mouse around.
colorbaraxis('on', 'image');title('Original Image', 'FontSize', fontSize);% Maximize the window to make it easier to draw.
g = gcf;g.WindowState = 'maximized'fprintf('Done running %s.m ...\n', mfilename);% Get mask
mask = grayImage > 53 | grayImage < 47;mask = imfill(mask, 'holes'); % Fill holes.
mask = bwareafilt(mask, 2); % Take 2 largest blobs only.
mask = bwconvhull(mask, 'objects'); % Take convex hull.
subplot(2, 2, 2);% histogram(originalImage)
imshow(mask);axis('on', 'image');title('Mask Image', 'FontSize', fontSize);% Get larger and smaller masks by dilating and eroding.
r = 3; % Radius for blur
se = strel('disk', r, 0);bigMask = imdilate(mask, se);smallMask = imerode(mask, se);% xor to get outline.
borderMask = xor(bigMask, smallMask);subplot(2, 2, 3);imshow(borderMask);axis('on', 'image');title('Border Mask Image', 'FontSize', fontSize);% Blur the entire image
windowSize = 5;kernel = ones(windowSize) / windowSize^2;blurredImage = imfilter(grayImage, kernel);% Now replace the gray image inside the border mask with the blurred values.
grayImage(borderMask) = blurredImage(borderMask);subplot(2, 2, 4);imagesc(grayImage)impixelinfo; % Let user see RGB values as they mouse around.colorbaraxis('on', 'image');title('Final Blurred Image', 'FontSize', fontSize);
I = imread('11.JPG') ;I1 = rgb2gray(I) ;[y,x] = find(I1==255) ;%% Fit circle to the data (x,y)
n=length(x); xx=x.*x; yy=y.*y; xy=x.*y;A=[sum(x) sum(y) n;sum(xy) sum(yy) sum(y);sum(xx) sum(xy) sum(x)];B=[-sum(xx+yy) ; -sum(xx.*y+yy.*y) ; -sum(xx.*x+xy.*y)];a=A\B;% Center of cricle
xc = -.5*a(1);yc = -.5*a(2);R = sqrt((a(1)^2+a(2)^2)/4-a(3));% Plot
imshow(I)hold onplot(xc,yc,'*b')Instead of fitting a circle, you can straight away, use mean of x and y also.
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