Turn a portion of a .tif image white

I have to read in an image of an x-ray and turn a specific bone to white without affecting the other portions of my image. Currently I have a white rectangle covering the bone, but I am not sure how to make it cover only the bone specifically. Is there a way I can outline the bone and then fill it with white?

[Walter Roberson]

Please post a sample image so we can examine the difficulty. It can probably be done relatively reasonably but there can be complications.

When it is filled with white do you want the entire bone to go to the same color or do you want different brightnesses ?

[br456]

The sesamoid bone needs to be completely white. It is the bone under where the toes connect to the foot

[Image Analyst]

Yep, my demos can do that.

[br456]

I have been attempting to use the freehand mask code with my image, but the only section that works with it is the binary mask portion where the inside of the freehand space is white and the rest of the image is black. Do you have any ideas of why this is?

Answer 1

[Image Analyst]

See attached demos.