Is there a function to extract the y-channel (=luminance) of an image in julia?

I am trying to extract the y channel of a rgb image and asking myself if there are some packages available for that?

What kind of brightness do you mean? There are different types…

The “standard” luminance is

Y = 0.2126R + 0.7152G + 0.0722B

Here is more information: Relative luminance - Wikipedia

To get started with reading the images, you can check

In Images.jl, there is imgg = Gray.(img) which does what you want.

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