Interpolation of angular data spline or linear?
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I have a binary image. in which i have different data points on different locations. I want to apply interpolation techniques between those points. can anyone help me how i can apply interpolation on angular data points . input image is attached.
![3.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/199996/image.jpeg)
The out put is something like the below image
![out.JPG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/199997/image.jpeg)
4 个评论
John D'Errico
2019-1-1
Then why not just clarify your last question? Your approach is to just keep asking the same question until you hope someone gives you an answer.
采纳的回答
Akira Agata
2019-1-2
One possible solution would be looks like this. In addition, if you feel @Image Analyst's answer for your previous question useful, I (...and Image Analyst-san) would be happy if you could accept it.
% Load the image
I = imread('3.jpg');
% Binarize and apply ultimate erosion
BW = imbinarize(rgb2gray(I));
BW = imclearborder(BW);
BW = bwulterode(BW);
% Find (x,y) coordinates
[row,col] = find(BW);
% Arrange the coordinates to circular order
theta = atan2(row-mean(row),col-mean(col));
data = table(row,col,theta);
data = sortrows(data,'theta');
data = [data;data(1,:)];
data.theta(end) = data.theta(end)+2*pi;
% Apply spline interpolation
n = 1:height(data);
pp = spline(n,[data.col';data.row']);
xy = ppval(pp,linspace(1,height(data)));
% Visualize the result
figure
imshow(I)
hold on
scatter(col,row,'rx')
plot(xy(1,:),xy(2,:),'r-')
![spline.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/200009/spline.png)
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