The following table illustrates the results of converting color images to greyscale using different formulas for the grey value. They have been created with ssocr.
| formula | color | grey |
|---|---|---|
| 0.2125*R + 0.7154*G + 0.0721*B | |
|
| 0.299*R + 0.587*G + 0.114*B | |
|
| (R+G+B)/3 | |
|
| min(R,G,B) | |
|
| max(R,G,B) | |
|
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