How to convert a grey-scale image into a reverse binary image

2019 12 13
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更新时间：2019 12 15
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cup.jpgI have images like the one shown above and I want to convert the image to a binary image where the black parts are white and the rest of the image is black. How would I approach solving this problem?

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Walter Roberson
Walter Roberson 2019-12-13

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Rbin = YourImage <= 42;

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Walter Roberson
Walter Roberson 2019-12-15
I assure you that it does work, with the exception of TIFF images that use IEEE floating point representation (these exist but are rare)

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Image Analyst
Image Analyst 2019-12-15

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Try this:
grayImage = 255 - grayImage; % Assuming your image is uint8. Use 65535 if it's uint16.

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