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Merge pull request #2143 from Daniil-Osokin:fix_docs_cvt_color_alpha_channel

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Andrey Pavlenko 2014-01-17 10:43:39 +04:00 committed by OpenCV Buildbot
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modules/imgproc/doc/miscellaneous_transformations.rst
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@ -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: