Find coordinate of a point and place them in circular form

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

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

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

[Akira Agata]

Before trying to code something, I would like to clearly understand your question. What you want to do is something like this??

[Alina tom]

Yes Sir , I want to extract first column from First image and place it in center . then extract first column from second image and place it with one degree increment and so on to make one frame . then do the same for second column from all the images and so on.

[Alina tom]

Sir may be i'm wrong but can we extract each column and convert it to cylindrical coordinates and place them in 3d space ?

[Alina tom]

Sorry if my questions are stupid

[Walter Roberson]

Sounds like something that iradon() might be useful for.

Answer 1

[Akira Agata]

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)

[Alina tom]

Sir

Thanks a lot for you time and help ..

Yes i have uploaded the 73 images due to size issue . actually i want to get this from 0 to 180 degree

You are right that 1st and last column contain line . i want to plot just fisrt and last dot from these lines. not the whole line .

Thank you again for your percious time