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--- ascii_art [2023/03/25 14:30] – [Step 3. Convert the RGB tuples of your pixels into single brightness numbers] frchris
+++ ascii_art [2023/03/25 15:26] – [Step 3. Convert the RGB tuples of your pixels into single brightness numbers] frchris
@@ Line 205: / Line 205: @@
   - Average: average the R, G and B values - ''(R + G + B) / 3''
   - Lightness: average the maximum and minimum values out of R, G and B - ''max(R, G, B) + min(R, G, B) / 2''
-  - Luminosity: take a weighted average of the R, G and B values to account for human perception - ''0.21 R + 0.72 G + 0.07 B''
+  - Luminance: take a weighted average of the R, G and B values to account for human perception - ''0.2126 R + 0.7152 G + 0.0722 B''
+  - Luminosity: Take the sqrt root of the weighted squares - ''sqrt( 0.299 R^2 + 0.587 G^2 + 0.114 B^2)''
   - See [[https://stackoverflow.com/questions/596216/formula-to-determine-brightness-of-rgb-color|this stackoverflow thread]] for more detail