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

In this iamge, I want to measure the distance between the center of area of white pixels marked below.

As these are not definite shapes, how do I find the center of these and then measure the distance in pixels between their centers.

Answer 1

[KSSV]

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.

[Ritwik Dhar]

Thanks!

imdistline was what I was looking for.

But could there be some way I could directly code the center pixel co-ordinates to the imdistline arguments so that I can use this with large number of images.

[KSSV]

You can get the center of image using mean.

Answer 2

[Teja Muppirala]

You can find the center (centroid) of each white region using REGIONPROPS, and then just calculate the distance between the centers that regionprops returns.

https://www.mathworks.com/help/images/ref/regionprops.html