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blind-find-rectangle.1 - blind - suckless command-line video editing utility
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blind-find-rectangle.1 (1668B)
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1 .TH BLIND-FIND-RECTANGLE 1 blind
2 .SH NAME
3 blind-find-rectangle - Locate a coloured rectangle
4 .SH SYNOPSIS
5 .B blind-find-rectangle
6 [-a
7 .IR min-area ]
8 [-h
9 .IR min-height ]
10 [-w
11 .IR min-width ]
12 .I X
13 .I Y
14 .I Z
15 .RI [ alpha ]
16 .SH DESCRIPTION
17 .B blind-find-rectangle
18 reads a video from stdin, and locates the largest
19 rectangle of a specified colour. If there are two
20 or more maximal rectangles, one is choosen arbitrarily.
21 The specified by the arguments
22 .IR X ,
23 .IR Y ,
24 and
25 .IR Z ,
26 and the selected
27 .I alpha
28 value. The colour is specified in CIE XYZ. If
29 .I X
30 and
31 .I Z
32 are not specified, the colour will be CIE Standard Illuminant
33 D65-grey with the luminosity
34 .IR Y .
35 If
36 .I alpha
37 is not specified, 1, which means fully opaque, will be used.
38 .SH STDOUT
39 The location and dimensions of the rectangle is printed stdout.
40 Exactly one line is printed per frame. Each line has the format
41 .nf
42
43 \fB"%zu %zu %zu %zu\\n"\fP, <\fIleft\fP>, <\fItop\fP>, <\fIwidth…
44
45 .fi
46 where
47 .I left
48 is position on the X-axis (measured from the left) on the
49 left-most pixels in the rectangle,
50 .I top
51 is position on the Y-axis (measured from the top) on the
52 top-most pixels in the rectangle,
53 .I width
54 is the width of the rectangle, and
55 .I height
56 is the width of the rectangle.
57 .SH NOTES
58 .B blind-find-rectangle
59 may be changed in the future to use some other colour model,
60 therefore, it is recommended to also use
61 .BR blind-colour-ciexyz (1)
62 if you are specifying the colour in CIE XYZ. If however
63 your values are colour space-agnostic, you should not.
64 .SH SEE ALSO
65 .BR blind (7),
66 .BR blind-colour-ciexyz (1),
67 .BR blind-colour-srgb (1)
68 .SH AUTHORS
69 Mattias Andrée
70 .RI < [email protected] >
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