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how can i get grayscale color in my binary image?

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Farah Nadiah
Farah Nadiah on 14 May 2016
Answered: Image Analyst on 14 May 2016
i want the intensity color in my binary image because after i get that i want to use threshold adaptive method. because in threshold i want to differentiate the dark intensity and bright. within by use threshold i can get only the image i want...thank you.
Farah Nadiah
Farah Nadiah on 14 May 2016
this is my grayscale image
this is my binary image
i want in binary that have their grayscale intensity because i want to detect the small dot and to do threshold at the result image..thank you

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Answers (2)

Walter Roberson
Walter Roberson on 14 May 2016
If you have a binary image, BW, then the intensity image that corresponds is
IntensityImage = double(BW);
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Walter Roberson
Walter Roberson on 14 May 2016
A binary image by definition is exactly two intensities. A binary image cannot have grayscale intensity.
What you probably want is to use .* to multiply your binary image by your grayscale image. The result will be a grayscale image that is 0 everywhere the binary image was 0.

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Image Analyst
Image Analyst on 14 May 2016
You can mask your image to show only the pixels in the binary blob locations but with their original grayscale intensity like this:
outputImage = grayImage; % Initialize
% Now make black in binary image black in the gray scale image.
outputImage(~binaryImage) = 0; % Be sure to use the ~ tilde!
imshow(outputImage, []); % Or don't use [] if you don't want it to scale intensity.


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