![]() On MacOSX, there is also an option to use native MacOSX image readers. So, OpenCV can always read JPEGs, PNGs, and TIFFs. On Microsoft Windows* OS and MacOSX*, the codecs shipped with an OpenCV image (libjpeg, libpng, libtiff, and libjasper) are used by default.Results may differ to the output of cvtColor() When using IMREAD_GRAYSCALE, the codec's internal grayscale conversion will be used, if available.In the case of color images, the decoded images will have the channels stored in B G R order.The function determines the type of an image by the content, not by the file extension.Raster and Vector geospatial data supported by GDAL (see the Note section).Radiance HDR - *.hdr, *.pic (always supported).OpenEXR Image files - *.exr (see the Note section).TIFF files - *.tiff, *.tif (see the Note section).Sun rasters - *.sr, *.ras (always supported).Portable image format - *.pbm, *.pgm, *.ppm *.pxm, *.pnm (always supported).Portable Network Graphics - *.png (see the Note section). ![]() JPEG 2000 files - *.jp2 (see the Note section).JPEG files - *.jpeg, *.jpg, *.jpe (see the Note section).Windows bitmaps - *.bmp, *.dib (always supported).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 ).Ĭurrently, the following file formats are supported: The function imread loads an image from the specified file and returns it. More.Ĭv::imwritemulti (const String &filename, InputArrayOfArrays img, const std::vector ¶ms=std::vector())ĭetailed Description Function Documentation ◆ imdecode() More.Ĭv::imwrite (const String &filename, InputArray img, const std::vector ¶ms=std::vector()) More.Ĭv::imread (const String &filename, int flags= IMREAD_COLOR)Ĭv::imreadmulti (const String &filename, std::vector &mats, int flags= IMREAD_ANYCOLOR) More.Ĭv::imdecode ( InputArray buf, int flags, Mat *dst)Ĭv::imencode (const String &ext, InputArray img, std::vector &buf, const std::vector ¶ms=std::vector())Įncodes an image into a memory buffer. Flags used for image file reading and writingĬv::imdecode ( InputArray buf, int flags)
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