pixfmt-packed-hsv.rst

  1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
  2.. c:namespace:: V4L
  3
  4.. _packed-hsv:
  5
  6******************
  7Packed HSV formats
  8******************
  9
 10Description
 11===========
 12
 13The *hue* (h) is measured in degrees, the equivalence between degrees and LSBs
 14depends on the hsv-encoding used, see :ref:`colorspaces`.
 15The *saturation* (s) and the *value* (v) are measured in percentage of the
 16cylinder: 0 being the smallest value and 255 the maximum.
 17
 18
 19The values are packed in 24 or 32 bit formats.
 20
 21
 22.. raw:: latex
 23
 24    \begingroup
 25    \tiny
 26    \setlength{\tabcolsep}{2pt}
 27
 28.. tabularcolumns:: |p{2.6cm}|p{0.8cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|
 29
 30.. _packed-hsv-formats:
 31
 32.. flat-table:: Packed HSV Image Formats
 33    :header-rows:  2
 34    :stub-columns: 0
 35
 36    * - Identifier
 37      - Code
 38      -
 39      - :cspan:`7` Byte 0 in memory
 40      - :cspan:`7` Byte 1
 41      - :cspan:`7` Byte 2
 42      - :cspan:`7` Byte 3
 43    * -
 44      -
 45      - Bit
 46      - 7
 47      - 6
 48      - 5
 49      - 4
 50      - 3
 51      - 2
 52      - 1
 53      - 0
 54
 55      - 7
 56      - 6
 57      - 5
 58      - 4
 59      - 3
 60      - 2
 61      - 1
 62      - 0
 63
 64      - 7
 65      - 6
 66      - 5
 67      - 4
 68      - 3
 69      - 2
 70      - 1
 71      - 0
 72
 73      - 7
 74      - 6
 75      - 5
 76      - 4
 77      - 3
 78      - 2
 79      - 1
 80      - 0
 81    * .. _V4L2-PIX-FMT-HSV32:
 82
 83      - ``V4L2_PIX_FMT_HSV32``
 84      - 'HSV4'
 85      -
 86      -
 87      -
 88      -
 89      -
 90      -
 91      -
 92      -
 93      -
 94
 95      - h\ :sub:`7`
 96      - h\ :sub:`6`
 97      - h\ :sub:`5`
 98      - h\ :sub:`4`
 99      - h\ :sub:`3`
100      - h\ :sub:`2`
101      - h\ :sub:`1`
102      - h\ :sub:`0`
103
104      - s\ :sub:`7`
105      - s\ :sub:`6`
106      - s\ :sub:`5`
107      - s\ :sub:`4`
108      - s\ :sub:`3`
109      - s\ :sub:`2`
110      - s\ :sub:`1`
111      - s\ :sub:`0`
112
113      - v\ :sub:`7`
114      - v\ :sub:`6`
115      - v\ :sub:`5`
116      - v\ :sub:`4`
117      - v\ :sub:`3`
118      - v\ :sub:`2`
119      - v\ :sub:`1`
120      - v\ :sub:`0`
121    * .. _V4L2-PIX-FMT-HSV24:
122
123      - ``V4L2_PIX_FMT_HSV24``
124      - 'HSV3'
125      -
126      - h\ :sub:`7`
127      - h\ :sub:`6`
128      - h\ :sub:`5`
129      - h\ :sub:`4`
130      - h\ :sub:`3`
131      - h\ :sub:`2`
132      - h\ :sub:`1`
133      - h\ :sub:`0`
134
135      - s\ :sub:`7`
136      - s\ :sub:`6`
137      - s\ :sub:`5`
138      - s\ :sub:`4`
139      - s\ :sub:`3`
140      - s\ :sub:`2`
141      - s\ :sub:`1`
142      - s\ :sub:`0`
143
144      - v\ :sub:`7`
145      - v\ :sub:`6`
146      - v\ :sub:`5`
147      - v\ :sub:`4`
148      - v\ :sub:`3`
149      - v\ :sub:`2`
150      - v\ :sub:`1`
151      - v\ :sub:`0`
152      -
153
154.. raw:: latex
155
156    \endgroup
157
158Bit 7 is the most significant bit.