How to detect white patches in the image?

Question

shashwathi shetty 2016-4-20

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https://ww2.mathworks.cn/matlabcentral/answers/279993-how-to-detect-white-patches-in-the-image

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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Answer 1

Nikhil Vyas 2016-4-27

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https://ww2.mathworks.cn/matlabcentral/answers/279993-how-to-detect-white-patches-in-the-image#answer_219617

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 2016-5-3

p10.jpg

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

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Answer 2

Image Analyst 2016-5-3

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https://ww2.mathworks.cn/matlabcentral/answers/279993-how-to-detect-white-patches-in-the-image#answer_220616

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 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