Getting Error while using "im2gray" function. I'm using Matlab 2020.

2021 2 13
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Jan
Jan 2021-2-13
编辑：Jan 2021-2-13

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Which Matlab version are you using?
In the documentation: https://www.mathworks.com/help/matlab/ref/im2gray.html you find:
Introduced in R2020b
You find the applied algorithm in the documentation also:
gs = 0.2989 * I(:, :, 1) + 0.5870 * I(:, :, 2) + 0.1140 * I(:, :, 3)

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Md. Mahadi Hasan
Md. Mahadi Hasan 2021-2-13
I'm using MATLAB 2020a;
I may fixed it by using "rgb2gray' function instead of "im2gray" function.
I hope both functions are work for same output doesn't it?
Jan
Jan 2021-2-13
编辑：Jan 2021-2-13
Again the documentation tells you, that exactly the same algorithm is used in rgb2gray also.

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