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Merge pull request #13241 from pasbi:master

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Alexander Alekhin 2018-11-22 17:18:23 +03:00 committed by GitHub
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7
modules/imgcodecs/include/opencv2/imgcodecs.hpp
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@ -145,6 +145,7 @@ Currently, the following file formats are supported:
- Portable Network Graphics - \*.png (see the *Note* section)
- WebP - \*.webp (see the *Note* section)
- Portable image format - \*.pbm, \*.pgm, \*.ppm \*.pxm, \*.pnm (always supported)
- PFM files - \*.pfm (see the *Note* section)
- Sun rasters - \*.sr, \*.ras (always supported)
- TIFF files - \*.tiff, \*.tif (see the *Note* section)
- OpenEXR Image files - \*.exr (see the *Note* section)
@ -171,6 +172,7 @@ Currently, the following file formats are supported:
[Vector](http://www.gdal.org/ogr_formats.html).
- If EXIF information are embedded in the image file, the EXIF orientation will be taken into account
and thus the image will be rotated accordingly except if the flag @ref IMREAD_IGNORE_ORIENTATION is passed.
- Use the IMREAD_UNCHANGED flag to keep the floating point values from PFM image.
@param filename Name of file to be loaded.
@param flags Flag that can take values of cv::ImreadModes
@ -195,8 +197,9 @@ single-channel or 3-channel (with 'BGR' channel order) images
can be saved using this function, with these exceptions:
- 16-bit unsigned (CV_16U) images can be saved in the case of PNG, JPEG 2000, and TIFF formats
- 32-bit float (CV_32F) images can be saved in TIFF, OpenEXR, and Radiance HDR formats; 3-channel
(CV_32FC3) TIFF images will be saved using the LogLuv high dynamic range encoding (4 bytes per pixel)
- 32-bit float (CV_32F) images can be saved in PFM, TIFF, OpenEXR, and Radiance HDR formats;
3-channel (CV_32FC3) TIFF images will be saved using the LogLuv high dynamic range encoding
(4 bytes per pixel)
- PNG images with an alpha channel can be saved using this function. To do this, create
8-bit (or 16-bit) 4-channel image BGRA, where the alpha channel goes last. Fully transparent pixels
should have alpha set to 0, fully opaque pixels should have alpha set to 255/65535 (see the code sample below).