CV-0.3.5.4: OpenCV based machine vision library

Safe HaskellSafe-Infered

CV.Image

Contents

Synopsis

Basic types

newtype Image channels depth Source

The type for Images

Constructors

S BareImage 

Instances

empty :: CreateImage (Image a b) => (Int, Int) -> Image a bSource

Allocate a new empty image

emptyCopy :: CreateImage (Image a b) => Image a b -> Image a bSource

 Allocate a new image that of the same size and type as the exemplar image given.

cloneImage :: Image a b -> IO (Image a b)Source

Create a copy of an image

withClone :: Image channels depth -> (Image channels depth -> IO ()) -> IO (Image channels depth)Source

withCloneValue :: Image channels depth -> (Image channels depth -> IO a) -> IO aSource

class CreateImage a whereSource

 Class for images that exist.

Methods

create :: (Int, Int) -> IO aSource

Create an image from size

Instances

Colour spaces

type family ChannelOf a :: *Source

Type family for expressing which channels a colorspace contains. This needs to be fixed wrt. the BGR color space.

data GrayScale Source

Single channel grayscale image

Instances

data DFT Source

Instances

data RGB Source

Instances

data RGBA Source

Instances

data RGB_Channel Source

Constructors

Red 
Green 
Blue 

Instances

data LAB Source

Instances

data LAB_Channel Source

Constructors

LAB_L 
LAB_A 
LAB_B 

Instances

type D32 = FloatSource

type D64 = DoubleSource

type D8 = Word8Source

data Tag tp Source

lab :: Tag LABSource

rgba :: Tag RGBASource

rgb :: Tag RGBSource

compose :: Composes a => Source a -> aSource

composeMultichannelImage :: CreateImage (Image tp a) => Maybe (Image GrayScale a) -> Maybe (Image GrayScale a) -> Maybe (Image GrayScale a) -> Maybe (Image GrayScale a) -> Tag tp -> Image tp aSource

IO operations

class Loadable a whereSource

Typeclass for CV items that can be read from file. Mainly images at this point.

Methods

readFromFile :: FilePath -> IO aSource

Instances

saveImage :: Save (Image c d) => FilePath -> Image c d -> IO ()Source

loadColorImage :: FilePath -> IO (Maybe (Image BGR D32))Source

loadImage :: FilePath -> IO (Maybe (Image GrayScale D32))Source

Pixel level access

class GetPixel a whereSource

Associated Types

type P a :: *Source

Methods

getPixel :: (Int, Int) -> a -> P aSource

Instances

class SetPixel a whereSource

Associated Types

type SP a :: *Source

Methods

setPixel :: (Int, Int) -> SP a -> a -> IO ()Source

Instances

getAllPixels :: (GetPixel a, Sized a, ~ * (Size a) (Int, Int)) => a -> [P a]Source

getAllPixelsRowMajor :: (GetPixel a, Sized a, ~ * (Size a) (Int, Int)) => a -> [P a]Source

mapImageInplace :: (P (Image GrayScale D32) -> P (Image GrayScale D32)) -> Image GrayScale D32 -> IO ()Source

Perform (a destructive) inplace map of the image. This should be wrapped inside withClone or an image operation

Image information

data ImageDepth Source

Instances

class Sized a whereSource

Typeclass for elements with a size, such as images and matrices.

Associated Types

type Size a :: *Source

Methods

getSize :: a -> Size aSource

Instances

getArea :: (Sized a, Num b, Size a ~ (b, b)) => a -> bSource

getChannel :: Enum a => a -> Image (ChannelOf a) d -> Image GrayScale dSource

getImageChannels :: Image c d -> IO CIntSource

getImageDepth :: Image c d -> IO ImageDepthSource

getImageInfo :: Image c d -> IO ((Int, Int), ImageDepth, CInt)Source

ROI's, COI's and subregions

setCOI :: Integral a => a -> Image c d -> IO ()Source

setROI :: (Integral t3, Integral t2, Integral t1, Integral t) => (t, t1) -> (t2, t3) -> Image c d -> IO ()Source

resetROI :: Image c d -> IO ()Source

getRegion :: (Int, Int) -> (Int, Int) -> Image c d -> Image c dSource

withIOROI :: (Integral t, Integral t1, Integral t2, Integral t3) => (t, t1) -> (t2, t3) -> Image c d -> IO b -> IO bSource

withROI :: (Int, Int) -> (Int, Int) -> Image c d -> (Image c d -> a) -> aSource

Blitting

blendBlit :: Image c d -> Image c1 d1 -> Image c3 d3 -> Image c2 d2 -> (CInt, CInt) -> IO ()Source

Blit image2 onto image1. This uses an alpha channel bitmap for determining the regions where the image should be blended with the base image.

blit :: Image GrayScale D32 -> Image GrayScale D32 -> (Int, Int) -> IO ()Source

blitM :: (Integral a3, Integral a2, Integral a1, Integral a) => (a, a1) -> [((a2, a3), Image GrayScale D32)] -> Image GrayScale D32Source

subPixelBlit :: Image c d -> Image c d -> (CDouble, CDouble) -> IO ()Source

safeBlit :: Image GrayScale D32 -> Image GrayScale D32 -> (Int, Int) -> Image GrayScale D32Source

montage :: CreateImage (Image GrayScale D32) => (Int, Int) -> Int -> [Image GrayScale D32] -> Image GrayScale D32Source

Create a montage form given images (u,v) determines the layout and space the spacing between images. Images are assumed to be the same size (determined by the first image)

tileImages :: Image c d -> Image c1 d1 -> (CInt, CInt) -> Image channels depthSource

Tile images by overlapping them on a black canvas.

Conversions

rgbToGray :: Image RGB D32 -> Image GrayScale D32Source

grayToRGB :: Image GrayScale D32 -> Image RGB D32Source

rgbToLab :: Image RGB D32 -> Image LAB D32Source

bgrToRgb :: Image BGR D8 -> Image RGB D8Source

rgbToBgr :: Image RGB D8 -> Image BGR D8Source

unsafeImageTo32F :: Image c d -> Image c D32Source

unsafeImageTo8Bit :: Image cspace a -> Image cspace D8Source

Low level access operations

newtype BareImage Source

Constructors

BareImage (ForeignPtr BareImage) 

Instances

creatingImage :: IO (Ptr BareImage) -> IO (Image channels depth)Source

unImage :: Image t t1 -> ForeignPtr BareImageSource

unS :: Image t t1 -> BareImageSource

 Remove typing info from an image

withGenBareImage :: BareImage -> (Ptr b -> IO b1) -> IO b1Source

withBareImage :: BareImage -> (Ptr BareImage -> IO b) -> IO bSource

creatingBareImage :: IO (Ptr BareImage) -> IO BareImageSource

withGenImage :: Image c d -> (Ptr b -> IO a) -> IO aSource

withImage :: Image c d -> (Ptr BareImage -> IO a) -> IO aSource

imageFPTR :: Image c d -> ForeignPtr BareImageSource

ensure32F :: Ptr BareImage -> IO (Ptr BareImage)Source

Extended error handling

setCatch :: IO CIntSource

data CvException Source

Instances