how to calculate the three sphere.

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mohd akmal masud on 23 Sep 2021

Commented: Image Analyst on 23 Sep 2021

接受的答案: Image Analyst

Hi all,

I have the image 20 images in subplot figure. then the image have three sphere.

Anyone can help me to calculate all the three sphere.

I used this command

T = regionprops('table', outt22,'Area','Centroid')

note: outt22 is the mask of my three volume. but it show only one area of the circle among the images.

                          T =
                         
                          1×2 table
                         
                          AreaCentroid
                         
                          ____________________
                         
                          25 149.08 114.68

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KSSV on 23 Sep 2021

You have to calculate that for each image and store into array. Calculating in the attched image is not feasible.

接受的答案

Image Analyst on 23 Sep 2021

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Direct link to this answer

//www.tatmou.com/matlabcentral/answers/1458934-how-to-calculate-the-three-sphere#answer_793629

You need to stack these images together into a 3-D volumetric image, and then use regionprops3() instead of regionprops().

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mohd akmal masud on 23 Sep 2021

I have try it. below is my command. but some error.

                                   
                                   filePattern = fullfile('C:\Users\Akmal\Desktop\I-131 256 28.02.2020\I-131 SPECT NEMA VALIDATION 01112019 256X256\testimages','*.png');
                                  
                                   fileList = dir(filePattern)
                                  
                                   numFiles = length(fileList);
                                  
                                   image3d = zeros(rows, columns, numFiles,“uint8”);
                                  
                                   fork = 1 : numFiles
                                  
                                   fullFileName = fullfile(fileList(k).folder, fileList(k).name)
                                  
                                   由高级= imread (fullFileName)
                                  
                                   image3d(:, :, k) = thisImage;
                                  
                                   end

ERROR

                                   
                                   fileList =
                                  
                                   41×1 structarray with fields:
                                  
                                   name
                                  
                                   folder
                                  
                                   date
                                  
                                   bytes
                                  
                                   isdir
                                  
                                   datenum
                                  
                                   Unrecognizedfunction or variable 'rows'.

what is the meaning of Unrecognized function or variable 'rows'.

Image Analyst on 23 Sep 2021

I thought that you knew in advance how many rows and columns your images have. If not, you can easily find out by just reading in one of them.

                                   yourImage = imread(yourFileNameOfOneImage);
                                  
                                   [rows, columns, numberOfColorChannels] = size(yourImage)

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how to calculate the three sphere.

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