A collection of 3D LUTs for colour-to-greyscale conversion in 64x64x64 HALD and x65 CUBE format.
https://github.com/janvancoppenolle/LUT/tree/main/BW%20Conversion
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| Input |
Brightness
\[{r+ g + b \over 3}\]
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| Result |
Luminance
\[0.2989 r + 0.587 g + 0.114 b\]
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| Result |
Euclidean
\[\sqrt{ r^2 + g^2 + b^2 \over 3}\]
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| Result |
sRGB Luma (Rec. 709)
\[0.2126r + 0.7152g + 0.0722b\]
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| Result |
Multiply
\[(r+1) (g+1) (b+1) - 1 \over 7\]
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| Result |
Screen
\[8 - (2-r) (2-g) (2-b) \over 7\]
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| Result |
Lightness
\[min(r,g,b) + max(r,g,b) \over 2\]
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| Result |
Middle
\[r+g+b-min(r,g,b)-max(r,g,b)\]
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| Result |
Minimum
\[min(r,g,b)\]
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| Result |
Maximum
\[max(r,g,b)\]
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| Result |
Orthochromatic (Cyan Filter)
\[g + b \over 2\]
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| Result |
Orthochromatic (Film Simulation)
\[max(g,{b \over 2})\]
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| Result |