image centroids on 2D plot

I have an image which has black spots in it, i have found the centroids of the spots. i want to display the image on a 2D plot so i can know the real coordinates of the centroids. how can i do this part?

[David Young]

Not sure what you mean by "real coordinates". If you have found the centroids, isn't that the same as knowing their coordinates?

A simple way to combine an image and some plotted data is to use imshow() to display the image, then do "hold on" and use functions such as plot() to superimpose additional information.

[Sana Tayyeb]

Thanks for your reply. By real coordinates I meant getting the values of the custom plot (that is the x and y-axis of plot).