how to convert an image into binary image while selecting multiple regions?

Hi, I use free hand drawing to select the regions in the image.

I segmented this image and converted to bw

and the next one is the binary image(binaryImage) of the above segmented image

 hFH = imfreehand();

    % Create a binary image ("mask") from the ROI object.
    binaryImage = hFH.createMask();   
----(binaryImage)-

i did inside contouring and selected the inner region,

this is the binary image of the inner region that i got after contouring

---binaryImage1----

and in order to get the binary image for the segmented image with the inner region i did

segmentedImageMask=binaryImage-binaryImage1;

I performed contouring of multiple regions, which means selected regions one by one. This is the first region

and this is the second region

So, when i tried to get the binary mask of the multiple regions by using

segmentedImageMask=binaryImage-binaryImage2;

I could get only the last region that i selected but not multiple regions.

Can you assist me in getting all the selected regions in the segmented binary mask of the multiple regions.

thanks...

Answer 1

[Image Analyst]

I already answered in the duplicate question: http://www.mathworks.com/matlabcentral/answers/142820#answer_145879