OpenCV.ImgCodecs

Documentation

data ImreadMode

Constructors

ImreadUnchanged

ImreadGrayscale

ImreadColor

ImreadAnyDepth

ImreadAnyColor

ImreadLoadGdal

Instances

Show ImreadMode

Methods

showsPrec :: Int -> ImreadMode -> ShowS

show :: ImreadMode -> String

showList :: [ImreadMode] -> ShowS

imdecode :: ImreadMode -> ByteString -> Mat (S '[D, D]) D D

Reads an image from a buffer in memory.

The function reads an image from the specified buffer in the memory. If the buffer is too short or contains invalid data, the empty matrix/image is returned.

OpenCV Sphinx doc

imdecodeM :: PrimMonad m => ImreadMode -> ByteString -> m (Mut (Mat (S '[D, D]) D D) (PrimState m))

data OutputFormat

Constructors

OutputBmp

OutputExr

OutputHdr Bool

Compression (run length encoding)

OutputJpeg JpegParams

OutputJpeg2000

OutputPng PngParams

OutputPxm Bool

Binary

OutputSunras

OutputTiff

OutputWebP Int

Quality [1..100], > 100 == lossless

Instances

Show OutputFormat

Methods

showsPrec :: Int -> OutputFormat -> ShowS

show :: OutputFormat -> String

showList :: [OutputFormat] -> ShowS

data JpegParams

Constructors

JpegParams

Fields

• jpegParamQuality :: Int

  \[0..100\]

• jpegParamProgressive :: Bool
• jpegParamOptimize :: Bool
• jpegParamRestartInterval :: Word16
• jpegParamLumaQuality :: Int
• jpegParamChromaQuality :: Int

Instances

Show JpegParams

Methods

showsPrec :: Int -> JpegParams -> ShowS

show :: JpegParams -> String

showList :: [JpegParams] -> ShowS

defaultJpegParams :: JpegParams

data PngStrategy

Constructors

PngStrategyDefault

PngStrategyFiltered

PngStrategyHuffmanOnly

PngStrategyRLE

PngStrategyFixed

Instances

Show PngStrategy

Methods

showsPrec :: Int -> PngStrategy -> ShowS

show :: PngStrategy -> String

showList :: [PngStrategy] -> ShowS

data PngParams

Constructors

PngParams

Fields

• pngParamCompression :: Int
• pngParamStrategy :: PngStrategy
• pngParamBinaryLevel :: Bool

Instances

Show PngParams

Methods

showsPrec :: Int -> PngParams -> ShowS

show :: PngParams -> String

showList :: [PngParams] -> ShowS

defaultPngParams :: PngParams

imencode :: OutputFormat -> Mat shape channels depth -> CvExcept ByteString

Encodes an image into a memory buffer.

WARNING: This function is not thread safe!

OpenCV Sphinx doc

imencodeM :: PrimMonad m => OutputFormat -> Mut (Mat shape channels depth) (PrimState m) -> CvExceptT m ByteString

Encodes an image into a memory buffer.

See imencode