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 | 1 | initial version |
the Y stands for the grayscale pixel value, not for alpha (which is irrelevant for computer vision, and thus just gets discarded)
the formula is actually a weighted sum, gray = (0.299 * red) + (0.587 * green) + (0.114 * blue).
maybe it gets more obvious, if you just add up the factors: 0.299 + 0.587 + 0.114 = 1
| | 2 | No.2 Revision |
the Y stands for the grayscale pixel value, not for alpha (which is irrelevant for computer vision, and thus just gets discarded)
the formula is actually a weighted sum,
gray = (0.299 * red) + (0.587 * green) + (0.114 * blue).
maybe it gets more obvious, if you just add up the factors: factors:
0.299 + 0.587 + 0.114 = 1
