How to detect white patches in the image?

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shashwathi shetty
shashwathi shetty 2016-4-20
评论： Image Analyst 2016-5-5
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.

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回答（2 个）

Nikhil Vyas
Nikhil Vyas 2016-4-27
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
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shashwathi shetty
shashwathi shetty 2016-5-3
regionprops has so many option, which is suitable to extract only white patches? I have attached one sample image

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Image Analyst
Image Analyst 2016-5-3
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.
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shashwathi shetty
shashwathi shetty 2016-5-5
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
Image Analyst 2016-5-5
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.

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