Reading multiple files from a folder and applying regionProps and saving co-ordinates

Hi,

I want to create bounding boxes around objects in an image and then store the co-ordinates of all the bounding boxes in the images in a table.

For example, if I have 3 images with different amounts of bounding boxes in each image it should be stored as something like this:

image 1- [a1,b1,c1,d1; a2,b2,c2,d2; a3,b3,c3,d3; a4,b4,c4,d4]

image 2 - [a1,b1,c1,d1; a2,b2,c2,d2]

image 3 - [a1,b1,c1,d1; a2,b2,c2,d2; a3,b3,c3,d3 ]

etc.

The problem I am having now is that only the last images bounding box co-ordinates are being stored in the array "prop". I understand that i should have some function to write these co-ordinates to this array but I am unsure of how to do this.

They are also not being stored in the format as shown above.

My code is shown below.

Any assistance would be greatly appreciated.

Thanks!!

Regards,

Kanu

fileFolder = 'D:\Binary1';
dirOutput = dir(fullfile(fileFolder,'Pothole*.jpg'));
fileNames = {dirOutput.name};

for k=1:length(fileNames)
    
    H = fileNames{k};
    S = imread(fileNames{k});

    bn = imbinarize(S);

    imshow(bn)

    bn = bwareaopen(bn,100);
    imshow(bn);

    [L Ne]= bwlabel(bn);

    prop =regionprops(L);
    
   
    hold on

    for n = 1:length(prop)
        rectangle('Position',prop(n).BoundingBox,'EdgeColor','g','LineWidth',2);
    end
    hold off

    A = struct2cell(prop);
end

Answer 1

[KALYAN ACHARJYA]

prop=cell(1,length(fileNames));
for .....
        

prop{k}=regionprops(L);
....
end

And prop retuen the cell array having the properties of all images one by one

>> prop
prop =
  1×n cell array %here n is the length of fileNames

   [255×1 struct]    [255×1 struct]   [255×1 struct]     [255×1 struct]     [255×1 struct].............

Here you can acess the properties of any images by simple calling prop, Say

For 1st image prop{1}, 2nd image prop{2}...so on

[Kanushka Gajjar]

If I do this, i get the following error:

Dot indexing is not supported for variables of this type.

Error in RegPropsTwo (line 33)

rectangle('Position',prop(n).BoundingBox,'EdgeColor','g','LineWidth',2);