imgcodecs.hpp 文件参考

#include "opencv2/core.hpp"

imgcodecs.hpp 的包含依赖关系图

此图显示直接或间接包含此文件的文件

类
类	cv::ImageCollection
	按需读取多页图像。 更多...
结构	cv::ImageCollection::iterator

命名空间
命名空间	cv
	磁盘上与文件关联的文件存储的“黑盒”表示。

枚举
枚举	cv::ImreadModes {   cv::IMREAD_UNCHANGED = -1 ,   cv::IMREAD_GRAYSCALE = 0 ,   cv::IMREAD_COLOR = 1 ,   cv::IMREAD_ANYDEPTH = 2 ,   cv::IMREAD_ANYCOLOR = 4 ,   cv::IMREAD_LOAD_GDAL = 8 ,   cv::IMREAD_REDUCED_GRAYSCALE_2 = 16 ,   cv::IMREAD_REDUCED_COLOR_2 = 17 ,   cv::IMREAD_REDUCED_GRAYSCALE_4 = 32 ,   cv::IMREAD_REDUCED_COLOR_4 = 33 ,   cv::IMREAD_REDUCED_GRAYSCALE_8 = 64 ,   cv::IMREAD_REDUCED_COLOR_8 = 65 ,   cv::IMREAD_IGNORE_ORIENTATION = 128 }
	Imread 标志。 更多...
枚举	cv::ImwriteEXRCompressionFlags {   cv::IMWRITE_EXR_COMPRESSION_NO = 0 ,   cv::IMWRITE_EXR_COMPRESSION_RLE = 1 ,   cv::IMWRITE_EXR_COMPRESSION_ZIPS = 2 ,   cv::IMWRITE_EXR_COMPRESSION_ZIP = 3 ,   cv::IMWRITE_EXR_COMPRESSION_PIZ = 4 ,   cv::IMWRITE_EXR_COMPRESSION_PXR24 = 5 ,   cv::IMWRITE_EXR_COMPRESSION_B44 = 6 ,   cv::IMWRITE_EXR_COMPRESSION_B44A = 7 ,   cv::IMWRITE_EXR_COMPRESSION_DWAA = 8 ,   cv::IMWRITE_EXR_COMPRESSION_DWAB = 9 }
枚举	cv::ImwriteEXRTypeFlags {   cv::IMWRITE_EXR_TYPE_HALF = 1 ,   cv::IMWRITE_EXR_TYPE_FLOAT = 2 }
枚举	cv::ImwriteFlags {   cv::IMWRITE_JPEG_QUALITY = 1 ,   cv::IMWRITE_JPEG_PROGRESSIVE = 2 ,   cv::IMWRITE_JPEG_OPTIMIZE = 3 ,   cv::IMWRITE_JPEG_RST_INTERVAL = 4 ,   cv::IMWRITE_JPEG_LUMA_QUALITY = 5 ,   cv::IMWRITE_JPEG_CHROMA_QUALITY = 6 ,   cv::IMWRITE_JPEG_SAMPLING_FACTOR = 7 ,   cv::IMWRITE_PNG_COMPRESSION = 16 ,   cv::IMWRITE_PNG_STRATEGY = 17 ,   cv::IMWRITE_PNG_BILEVEL = 18 ,   cv::IMWRITE_PXM_BINARY = 32 ,   cv::IMWRITE_EXR_TYPE = (3 << 4) + 0 ,   cv::IMWRITE_EXR_COMPRESSION = (3 << 4) + 1 ,   cv::IMWRITE_EXR_DWA_COMPRESSION_LEVEL = (3 << 4) + 2 ,   cv::IMWRITE_WEBP_QUALITY = 64 ,   cv::IMWRITE_HDR_COMPRESSION = (5 << 4) + 0 ,   cv::IMWRITE_PAM_TUPLETYPE = 128 ,   cv::IMWRITE_TIFF_RESUNIT = 256 ,   cv::IMWRITE_TIFF_XDPI = 257 ,   cv::IMWRITE_TIFF_YDPI = 258 ,   cv::IMWRITE_TIFF_COMPRESSION = 259 ,   cv::IMWRITE_TIFF_ROWSPERSTRIP = 278 ,   cv::IMWRITE_TIFF_PREDICTOR = 317 ,   cv::IMWRITE_JPEG2000_COMPRESSION_X1000 = 272 ,   cv::IMWRITE_AVIF_QUALITY = 512 ,   cv::IMWRITE_AVIF_DEPTH = 513 ,   cv::IMWRITE_AVIF_SPEED = 514 }
	Imwrite 标志。 更多...
枚举	cv::ImwriteHDRCompressionFlags {   cv::IMWRITE_HDR_COMPRESSION_NONE = 0 ,   cv::IMWRITE_HDR_COMPRESSION_RLE = 1 }
	Imwrite HDR 特定值，用于 IMWRITE_HDR_COMPRESSION 参数键。 更多...
枚举	cv::ImwriteJPEGSamplingFactorParams {   cv::IMWRITE_JPEG_SAMPLING_FACTOR_411 = 0x411111 ,   cv::IMWRITE_JPEG_SAMPLING_FACTOR_420 = 0x221111 ,   cv::IMWRITE_JPEG_SAMPLING_FACTOR_422 = 0x211111 ,   cv::IMWRITE_JPEG_SAMPLING_FACTOR_440 = 0x121111 ,   cv::IMWRITE_JPEG_SAMPLING_FACTOR_444 = 0x111111 }
枚举	cv::ImwritePAMFlags {   cv::IMWRITE_PAM_FORMAT_NULL = 0 ,   cv::IMWRITE_PAM_FORMAT_BLACKANDWHITE = 1 ,   cv::IMWRITE_PAM_FORMAT_GRAYSCALE = 2 ,   cv::IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA = 3 ,   cv::IMWRITE_PAM_FORMAT_RGB = 4 ,   cv::IMWRITE_PAM_FORMAT_RGB_ALPHA = 5 }
	Imwrite PAM 特定的 tupletype 标志，用于定义 PAM 文件的“TUPLETYPE”字段。 更多...
枚举	cv::ImwritePNGFlags {   cv::IMWRITE_PNG_STRATEGY_DEFAULT = 0 ,   cv::IMWRITE_PNG_STRATEGY_FILTERED = 1 ,   cv::IMWRITE_PNG_STRATEGY_HUFFMAN_ONLY = 2 ,   cv::IMWRITE_PNG_STRATEGY_RLE = 3 ,   cv::IMWRITE_PNG_STRATEGY_FIXED = 4 }
	Imwrite PNG 特定的标志，用于调整压缩算法。 更多...
枚举	cv::ImwriteTiffCompressionFlags {   cv::IMWRITE_TIFF_COMPRESSION_NONE = 1 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITTRLE = 2 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITTFAX3 = 3 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITT_T4 = 3 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITTFAX4 = 4 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITT_T6 = 4 ,   cv::IMWRITE_TIFF_COMPRESSION_LZW = 5 ,   cv::IMWRITE_TIFF_COMPRESSION_OJPEG = 6 ,   cv::IMWRITE_TIFF_COMPRESSION_JPEG = 7 ,   cv::IMWRITE_TIFF_COMPRESSION_T85 = 9 ,   cv::IMWRITE_TIFF_COMPRESSION_T43 = 10 ,   cv::IMWRITE_TIFF_COMPRESSION_NEXT = 32766 ,   cv::IMWRITE_TIFF_COMPRESSION_CCITTRLEW = 32771 ,   cv::IMWRITE_TIFF_COMPRESSION_PACKBITS = 32773 ,   cv::IMWRITE_TIFF_COMPRESSION_THUNDERSCAN = 32809 ,   cv::IMWRITE_TIFF_COMPRESSION_IT8CTPAD = 32895 ,   cv::IMWRITE_TIFF_COMPRESSION_IT8LW = 32896 ,   cv::IMWRITE_TIFF_COMPRESSION_IT8MP = 32897 ,   cv::IMWRITE_TIFF_COMPRESSION_IT8BL = 32898 ,   cv::IMWRITE_TIFF_COMPRESSION_PIXARFILM = 32908 ,   cv::IMWRITE_TIFF_COMPRESSION_PIXARLOG = 32909 ,   cv::IMWRITE_TIFF_COMPRESSION_DEFLATE = 32946 ,   cv::IMWRITE_TIFF_COMPRESSION_ADOBE_DEFLATE = 8 ,   cv::IMWRITE_TIFF_COMPRESSION_DCS = 32947 ,   cv::IMWRITE_TIFF_COMPRESSION_JBIG = 34661 ,   cv::IMWRITE_TIFF_COMPRESSION_SGILOG = 34676 ,   cv::IMWRITE_TIFF_COMPRESSION_SGILOG24 = 34677 ,   cv::IMWRITE_TIFF_COMPRESSION_JP2000 = 34712 ,   cv::IMWRITE_TIFF_COMPRESSION_LERC = 34887 ,   cv::IMWRITE_TIFF_COMPRESSION_LZMA = 34925 ,   cv::IMWRITE_TIFF_COMPRESSION_ZSTD = 50000 ,   cv::IMWRITE_TIFF_COMPRESSION_WEBP = 50001 ,   cv::IMWRITE_TIFF_COMPRESSION_JXL = 50002 }
枚举	cv::ImwriteTiffPredictorFlags {   cv::IMWRITE_TIFF_PREDICTOR_NONE = 1 ,   cv::IMWRITE_TIFF_PREDICTOR_HORIZONTAL = 2 ,   cv::IMWRITE_TIFF_PREDICTOR_FLOATINGPOINT = 3 }

函数
CV_EXPORTS_W bool	cv::haveImageReader (const String &filename)
	如果指定的图像可以由 OpenCV 解码，则返回 true。
CV_EXPORTS_W bool	cv::haveImageWriter (const String &filename)
	如果具有指定文件名的图像可以由 OpenCV 编码，则返回 true。
CV_EXPORTS_W size_t	cv::imcount (const String &filename, int flags=IMREAD_ANYCOLOR)
	返回给定文件中的图像数量。
CV_EXPORTS_W Mat	cv::imdecode (InputArray buf, int flags)
	从内存中的缓冲区读取图像。
CV_EXPORTS Mat	cv::imdecode (InputArray buf, int flags, Mat *dst)
CV_EXPORTS_W bool	cv::imdecodemulti (InputArray buf, int flags, CV_OUT std::vector< Mat > &mats, const cv::Range &range=Range::all())
	从内存中的缓冲区读取多页图像。
CV_EXPORTS_W bool	cv::imencode (const String &ext, InputArray img, CV_OUT std::vector< uchar > &buf, const std::vector< int > &params=std::vector< int >())
	将图像编码到内存缓冲区。
CV_EXPORTS_W Mat	cv::imread (const String &filename, int flags=IMREAD_COLOR)
	从文件加载图像。
CV_EXPORTS_W void	cv::imread (const String &filename, OutputArray dst, int flags=IMREAD_COLOR)
	从文件加载图像。
CV_EXPORTS_W bool	cv::imreadmulti (const String &filename, CV_OUT std::vector< Mat > &mats, int flags=IMREAD_ANYCOLOR)
	从文件加载多页图像。
CV_EXPORTS_W bool	cv::imreadmulti (const String &filename, CV_OUT std::vector< Mat > &mats, int start, int count, int flags=IMREAD_ANYCOLOR)
	从文件加载多页图像的图像集。
CV_EXPORTS_W bool	cv::imwrite (const String &filename, InputArray img, const std::vector< int > &params=std::vector< int >())
	将图像保存到指定文件。
static CV_WRAP bool	cv::imwritemulti (const String &filename, InputArrayOfArrays img, const std::vector< int > &params=std::vector< int >())
	用于绑定的多图像重载