How to remove background color from an image

How to remove the background color from an RGB image? Need to remove the most prominent color in an image. How to use histogram for this technique?

Answer 1

[Mahdi]

I think this tutorial will help you. Look through the other examples to learn more.

Answer 2

[Image Analyst]

You should take a look at the Color Frequency Image, if you aren't sure which color is the most prevalent. http://www.mathworks.com/matlabcentral/fileexchange/28164-color-frequency-image

You can also take a look at my color segmentation tutorials: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862