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.TH BLIND-AFFINE-COLOUR 1 blind
.SH NAME
blind-affine-colour - Apply an affine transformation to the colours in a video
.SH SYNOPSIS
.B blind-affine-colour
[-alp]
.I matrix-stream
.SH DESCRIPTION
.B blind-affine-colour
reads a video from stdin and a matrix video from
.I matrix-stream
and multiplies colours from stdin with matrices from
.I matrix-stream
and prints the resulting video to stdout.
.P
Each frame in
.I matrix-stream
is a matrix and shall have the width and height 5.
Each pixel in a frame is a cell in the matrix,
the pixels luma is multiples by its alpha value
to determine the value of the matrix cell.
.SH OPTIONS
.TP
.B -a
The width and height of the matrix shall be 4
instead of 5 (reduced by 1) and the alpha values
of the pixels shall not be modified.
.TP
.B -l
The width and height of the matrix shall be 4
instead of 5 (reduced by 1) making the transformation
linear instead of affine.
.TP
.B -p
Each frame in
.I matrix-stream
shall contain one matrix per pixel in a frame in
stdin. The video in
.I matrix-stream
shall be 5, 4, or 3, depending on whether
.B -a
and
.B -l
are specified, times are wide and tall as the
video in stdin.
.SH NOTES
If both
.B -a
and
.B -l
are specified, the matrices shall have the
width and height 3 instead of 5.
.SH REQUIREMENTS
.B blind-affine-colour
requires enough free memory to load 5, 4, or 3,
depending on whether
.B -a
and
.B -l
are specified, full rows from
.I matrix-stream
into memory. A frame requires 32 bytes per pixel
it contains.
.SH SEE ALSO
.BR blind (7),
.BR blind-arithm (1),
.BR blind-invert-matrix (1),
.BR blind-multiply-matrice (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >
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