How to detect white patches in the image?

I need to detect aceto-white region in cervicogram image to detect cervical cancer. Thresholding and k-means are not suitable. Is there any method to detect white patch? I am using MATLAB.

Answer 1

[Nikhil Vyas]

You may use regionprops for this. For information about usage of regionprops, refer the following link.

http://www.mathworks.com/help/images/ref/regionprops.html

[shashwathi shetty]

regionprops has so many option, which is suitable to extract only white patches? I have attached one sample image

Answer 2

[Image Analyst]

You'll need to use color segmentation. See my demos: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Or else use Color Thresholder on the Apps tab of the MATLAB tool ribbon.

[shashwathi shetty]

Dear Image Analyst, Could you please help with the code?

Thankyou

[Image Analyst]

Please at least Try the Color Thresholder. From that you can export code.

[shashwathi shetty]

Dear Image Analyst, I could segment white patches by considering blue component of RGB image. Result is Gray image. I want to overlap gray image on original colour image. I tried multiplicatio, imfuse and overlay function, but it changes the colour of original image. How to get back the original colour of extracted white patch? Thank you

[Image Analyst]

Please at least Try the Color Thresholder. From that you can export code.

Then you can use the mask to blacken outside the regions of interest.