MATLAB: How to find the density of an object in an image

image processingImage Processing ToolboxMATLABStatistics and Machine Learning Toolbox

I have an image of a cell. Inside it there are a lot of small organelles. I want to find out how close are they to each other, some kind of density measure but not exactly. I want to find the nearest neighbor to every organelle. I tried to use BWdist but it measure distance between pixels and in my image – not every organelle equals one pixel. do you have any ideas how to measure this? in the attached image – I want to look only at the small black dots and to find out how far are they from each other

thank you for your help!

Best Answer

Use regionprops to get centroid, then pdist2 to get nearest neighbor distances.

Related Solutions

MATLAB: Calculating the distances of the centers of objects to each other at image

If you have the Statistics and Machine Learning Toolbox, use pdist2

props = regionprops(binaryImage, 'Centroid');
centroids = [props.Centroid];
xCentroids = centroids(1:2:end);
yCentroids = centroids(2:2:end);
xy = [xCentroids, yCentroids];
distances = pdist2(xy, xy)

MATLAB: How to calculate distance between center of white pixels in an image

REad about imdistline; this will allow you to calculate the distance between the points interactively. For this you are supposed to have image toolbox.

[y,x] = find(I==1) ;  % give the pixel value

The above line, gives you the coordinates/ points of the required pixel. YOu have the points in hand, you can do the process needed.

Best Answer

Related Solutions

MATLAB: Calculating the distances of the centers of objects to each other at image

MATLAB: How to calculate distance between center of white pixels in an image

Related Question