diff options
| author | Mattias Andrée <maandree@kth.se> | 2017-07-14 21:15:32 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2017-07-14 21:15:32 +0200 |
| commit | ff0286325a3dd1f4fe7e29e78341b9bd63e1725c (patch) | |
| tree | 784b7ac282353a4d2b26f898c24f2f8cf2379975 /man/blind-matrix-rotate.1 | |
| parent | Fix blind-invert-matrix and increase percision of blind-to-text (diff) | |
| download | blind-ff0286325a3dd1f4fe7e29e78341b9bd63e1725c.tar.gz blind-ff0286325a3dd1f4fe7e29e78341b9bd63e1725c.tar.bz2 blind-ff0286325a3dd1f4fe7e29e78341b9bd63e1725c.tar.xz | |
blind-matrix-{rotate,shear}: add -d
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'man/blind-matrix-rotate.1')
| -rw-r--r-- | man/blind-matrix-rotate.1 | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/man/blind-matrix-rotate.1 b/man/blind-matrix-rotate.1 index 31ec330..3c82a3b 100644 --- a/man/blind-matrix-rotate.1 +++ b/man/blind-matrix-rotate.1 @@ -3,7 +3,7 @@ blind-matrix-rotate - Create an affine 2D-transformation matrix for rotation .SH SYNOPSIS .B blind-matrix-rotate -[-c] +[-cd] .SH DESCRIPTION .B blind-matrix-rotate creates an affine 2D-transformation matrix for @@ -28,9 +28,21 @@ Create different matrices for each channel. Use values from each channel in stdin to create matrices whose values are stored in the same channels in stdout. +.TP +.B -d +Input angles in degrees rather than radians. .SH NOTES The image is rotated anti-clockwise if the Y-axis grows upwards rather than downwards. +.P +Due to truncation error, when rotating a multiple +of 90 degrees, it is preferable to use +.B -d +with lets +.B blind-matrix-rotate +eliminate the error. If this is not done, +.BR blind-invert-matrix (1) +may return odd results. .SH SEE ALSO .BR blind (7), .BR blind-from-text (1), |