how to overlay segmented area's in color over grayscale image?

Hi , I have a grayscale image for which I need to do some segmentation and find cells. after which I need to show the segmented cells on top of the original image . but I need the perimeter of the cells to be in color and indexed so I can see how many cells I found.

I have done the segmentation and found the perimeters of the cells but how do I show them on top of the original image?

I got confused with the alphadata property and all other options.. thank you

Answer 1

[Image Analyst]

It's described in Steve's blog: http://blogs.mathworks.com/steve/2009/02/18/image-overlay-using-transparency/

[Image Analyst]

If you just need the perimeters, use bwboundaries(), and then turn "hold on" and then use plot() to plot the outlines/boundaries/perimeters.

Answer 2

[Matt J]

Here's a FEX tool that works well for me,

http://www.mathworks.com/matlabcentral/fileexchange/42904-imoverlay