blind-invert-luma.1 - blind - suckless command-line video editing utility | |
git clone git://git.suckless.org/blind | |
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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] > |