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blind-invert-luma.1 - blind - suckless command-line video editing utility
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blind-invert-luma.1 (1212B)
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1 .TH BLIND-INVERT-LUMA 1 blind
2 .SH NAME
3 blind-invert-luma - Invert the luminosity of a video
4 .SH SYNOPSIS
5 .B blind-invert-luma
6 [-iw]
7 .I mask-stream
8 .SH DESCRIPTION
9 .B blind-invert-luma
10 reads a video from stdin and a mask video from
11 .IR mask-stream .
12 The video is printed to stdout, with the luminosity
13 inverted where, in
14 .IR mask-stream ,
15 the product of the luminosity and the alpha value is
16 1, and unchanged where the product is 0. For other
17 products, the result is linearly interpolated or
18 linearly extrapolated.
19 .P
20 If stdin is longer than
21 .IR mask-stream ,
22 the remainder of stdin is printed without any changes.
23 If stdin is shorter than
24 .IR mask-stream ,
25 the remainder of
26 .I mask-stream
27 is ignored but may be partially read.
28 .SH OPTIONS
29 .TP
30 .B -i
31 Invert the luminosity in
32 .I mask-stream
33 before calculating the product of the luminosity and
34 the alpha value.
35 .TP
36 .B -w
37 Instead of using CIE Standard Illuminant D65 as the
38 whitepoint, use the X and Z from each pixel in
39 .I mask-stream
40 for the whitepoint.
41 .SH SEE ALSO
42 .BR blind (7),
43 .BR blind-single-colour (1),
44 .BR blind-arithm (1),
45 .BR blind-set-alpha (1),
46 .BR blind-set-luma (1),
47 .BR blind-set-saturation (1)
48 .SH AUTHORS
49 Mattias Andrée
50 .RI < [email protected] >
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