I have 8 balloons which scatter on a binary image with no specific pattern, I want to get the distance every pairwise of balloons, could you give me any suggestion or codes?how can I do that?

I have 8 balloons which scatter on a binary image with no specific pattern, I want to get the distance between every pairwise of balloons, could you give me any suggestion or codes?how cando i that?

Answer 1

[Image Analyst]

See my image segmentation tutorial to get the centroids. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 Then use the Pythagorean theorem to find distances between each pair of centroids. Post your image if you want better advice.

[Image Analyst]

Zohreh's "Answer" moved here:

I have segmented my image and Already I have 8 markers on it , How can i get the the 8 distance between centroid of these objects (I want just distance between pairwise of objects in horizontal and vertical direction,I do not want distance in diagonal direction )

hori

[Image Analyst]

Let me attach the BlobsDemo tutorial I referred you to. To find the centroid of any given blob, you can do

blobCentroid = blobMeasurements(k).Centroid;

So you just do a double loop:

for j = 1 : numberOfBlobs           % Loop through all blobs.
  for k = 1 : numberOfBlobs           % Loop through all blobs.
    blobCentroidj = blobMeasurements(j).Centroid;
    blobCentroidk = blobMeasurements(k).Centroid;
    horizontalDistances(j, k) = blobCentroidj(1) - blobCentroidk(1);
    verticalDistances(j, k) = blobCentroidj(2) - blobCentroidk(2);
  end
end

Then just plug in any j and k you want and get the horizontal or vertical distances.

[Zohreh Tavakkoli]

Thank you very much :)