Anonymous user
Grayscale image: Difference between revisions
different structure for grayscale, bug fixes
(added J code) |
(different structure for grayscale, bug fixes) |
||
Line 378:
=={{header|J}}==
Grayscale image is stored as two-dimensional array of luminance values.
<lang j>
NB. converts the image to grayscale according to formula
NB. L = 0.2126*R + 0.7152*G + 0.0722*B
toGray=:
NB. converts grayscale image to the color image, with all channels equal
toColor=: 3 & $"0 0
</lang>
Examples:
<lang j>
viewImage toColor toGray myimg
</lang>
| |||