generic-library/opencv
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fixed cvtColor alpha channel docs

Browse Source
This commit is contained in:
Daniil Osokin 2014-01-13 14:20:42 +04:00
parent 890f1baff0
commit 8ce691e679
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
modules/imgproc/doc/miscellaneous_transformations.rst
View File

@ -113,6 +113,8 @@ But in case of a non-linear transformation, an input RGB image should be normali
If you use ``cvtColor`` with 8-bit images, the conversion will have some information lost. For many applications, this will not be noticeable but it is recommended to use 32-bit images in applications that need the full range of colors or that convert an image before an operation and then convert back.
If conversion adds the alpha channel, its value will set to the maximum of corresponding channel range: 255 for ``CV_8U``, 65535 for ``CV_16U``, 1 for ``CV_32F``.
The function can do the following transformations:
*
@ -127,7 +129,7 @@ The function can do the following transformations:
.. math::
\text{Gray to RGB[A]:} \quad R \leftarrow Y, G \leftarrow Y, B \leftarrow Y, A \leftarrow 0
\text{Gray to RGB[A]:} \quad R \leftarrow Y, G \leftarrow Y, B \leftarrow Y, A \leftarrow \max (ChannelRange)
The conversion from a RGB image to gray is done with: