def imread(filename, flags=None): # real signature unknown; restored from __doc__"""imread(filename[, flags]) -> retval. @brief Loads an image from a file. 從文件加載圖像。. . @anchor imread. . The function imread loads an image from the specified file and returns it. If the image cannot be. read (because of missing file, improper permissions, unsupported or invalid format), the function. returns an empty matrix ( Mat::data==NULL ).該函數imread從指定的文件加載圖像并返回它。 如果無法讀取圖像（由于缺少文件，權限不正確，格式不受支持或格式無效），該函數將返回一個空矩陣（Mat :: data == NULL）。. . Currently, the following file formats are supported: 當前，支持以下文件格式：. . - Windows bitmaps - \*.bmp, \*.dib (always supported). - JPEG files - \*.jpeg, \*.jpg, \*.jpe (see the *Note* section). - JPEG 2000 files - \*.jp2 (see the *Note* section). - 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). - Radiance HDR - \*.hdr, \*.pic (always supported). - Raster and Vector geospatial data supported by GDAL (see the *Note* section). . @note. - The function determines the type of an image by the content, not by the file extension.該功能通過內容而不是文件擴展名確定圖像的類型. - In the case of color images, the decoded images will have the channels stored in **B G R** order.對于彩色圖像，解碼后的圖像將具有以** B G R **順序存儲的通道。. - When using IMREAD_GRAYSCALE, the codec's internal grayscale conversion will be used, if available.. Results may differ to the output of cvtColor()使用IMREAD_GRAYSCALE時，將使用編解碼器的內部灰度轉換（如果有）。 結果可能與cvtColor（）的輸出不同. - On Microsoft Windows\* OS and MacOSX\*, the codecs shipped with an OpenCV image (libjpeg,. libpng, libtiff, and libjasper) are used by default. So, OpenCV can always read JPEGs, PNGs,. and TIFFs. On MacOSX, there is also an option to use native MacOSX image readers. But beware. that currently these native image loaders give images with different pixel values because of. the color management embedded into MacOSX.在Microsoft Windows \ * OS和MacOSX \ *上，默認使用OpenCV映像附帶的編解碼器（libjpeg，libpng，libtiff和libjasper）。 因此，OpenCV始終可以讀取JPEG，PNG和TIFF。 在MacOSX上，還可以選擇使用本機MacOSX圖像讀取器。 但是請注意，由于MacOSX中嵌入了色彩管理，當前這些本機圖像加載器會為圖像提供不同的像素值。. - On Linux\*, BSD flavors and other Unix-like open-source operating systems, OpenCV looks for. codecs supplied with an OS image. Install the relevant packages (do not forget the development. files, for example, "libjpeg-dev", in Debian\* and Ubuntu\*) to get the codec support or turn. on the OPENCV_BUILD_3RDPARTY_LIBS flag in CMake.在Linux \ *，BSD版本和其他類似Unix的開源操作系統上，OpenCV會尋找OS映像隨附的編解碼器。 安裝相關的軟件包（不要忘記在Debian \ *和Ubuntu \ *中忘記開發文件，例如“ libjpeg-dev”）以獲得編碼解碼器支持或在CMake中打開OPENCV_BUILD_3RDPARTY_LIBS標志。. - In the case you set *WITH_GDAL* flag to true in CMake and @ref IMREAD_LOAD_GDAL to load the image,. then the [GDAL](http://www.gdal.org) driver will be used in order to decode the image, supporting. the following formats: [Raster](http://www.gdal.org/formats_list.html),. [Vector](http://www.gdal.org/ogr_formats.html).如果您在CMake中將* WITH_GDAL *標志設置為true并使用@ref IMREAD_LOAD_GDAL加載圖像，則將使用[GDAL]（http://www.gdal.org）驅動程序對圖像進行解碼，以支持 以下格式：[Raster]（http://www.gdal.org/formats_list.html)、[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.如果將EXIF信息嵌入到圖像文件中，則將考慮EXIF方向，因此，除非傳遞了@ref IMREAD_IGNORE_ORIENTATION標志，否則圖像將相應旋轉。. - Use the IMREAD_UNCHANGED flag to keep the floating point values from PFM image.使用IMREAD_UNCHANGED標志保留PFM圖像中的浮點值。. - By default number of pixels must be less than 2^30. Limit can be set using system. variable OPENCV_IO_MAX_IMAGE_PIXELS默認情況下，像素數必須小于2 ^ 30。 可以使用系統變量OPENCV_IO_MAX_IMAGE_PIXELS設置限制. . @param filename Name of file to be loaded. 要加載的文件名。. @param flags Flag that can take values of cv::ImreadModes 可以采用cv :: ImreadModes值的標志"""pass

flags，cv::ImreadModes請見：
python opencv imread(filename, flags=None) 讀取圖像 flags cv::ImreadModes 參數上哪看去？

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