How to convert False color Images to Black & White?

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Manoj Kumar 2014-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/132301-how-to-convert-false-color-images-to-black-white

评论： Image Analyst 2017-3-14

Hi, I have an Image and I wanted that to convert into BW. But when I use im2bw(), it is not showing the black & white image. I here by attach the image.

Thank you...

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Image Analyst 2014-6-3

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在 MATLAB Online 中打开

I can't see the image. If you use rgb2gray() you probably won't get anything that makes sense. You really need to have the color map that was used to pseudocolor the image. If you have that you can recover the original gray scale image using

grayImage = rgb2ind(rgbImage, colorMap);

Then you can threshold that grayscale image to get a binary image. By the way, your image link is broken.

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Image Analyst 2014-6-5

freehand_masking_demo.m

I'm not sure what you mean, but see my attached freehand masking demo and see if that does what you want.

Manoj Kumar 2014-6-6

It worked, thank you..

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pallavi awate 2017-3-14

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hello sir, i have to count the object from the image.but their is some problem.when two object is too closed then it shows this is one object.now how i can solve this.please help me.can u send me the code for this.please please please..