![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/188961/image.png)
Find coordinate of a point and place them in circular form
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Hi all
I have multiple binary images which consist of 271 columns and I want to get the coordinates of white pixels from each column and place them in circular(cylindrical) from . like red dot. read these dots and plot then in cylindrical coordinate
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/190812/image.jpeg)
Actually I want to read first column pixels from all the images and plot them into cylindrical from and then read the second column and make a new circle and so one for all the column of the images
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/190813/image.jpeg)
First one is input image and 2nd one is the output of 1st frame of cylindrical and soo on . any one help me with code
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Akira Agata
2018-5-29
As Walter-san mentioned, it sounds like iradon function. But seems not applicable this function directly. The following is my preliminary try and I believe possible solution would be like this.
Alina-san, let me clarify some points:
- Your data set contains 73 image files, so the result plots only 0~72 degrees. Is this OK for you?
- 1st and last column of each image is not a separated dots (separated logical "true"s) , but a line (continuous "true"s). These columns should be ignored, or should be plotted also?
fileList = struct2table(dir('./Images/*.tif'));
fileList = sortrows(fileList,'date');
h = 512; % Height of the image in pixel
BW = false(h);
for kk1 = 1:height(fileList)
I = imread(fullfile(fileList.folder{kk1},fileList.name{kk1}));
BWtmp = false(h);
BWtmp(:,h/2) = I(:,2);
BWtmp = imrotate(BWtmp,kk1-1);
center = size(BWtmp)/2;
BWtmp = imcrop(BWtmp,[center(1)-h/2+1,center(2)-h/2+1,h-1,h-1]);
BW = BW | BWtmp;
end
figure
imshow(BW)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/188845/image.png)
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