| Safe Haskell | Safe-Infered |
|---|
CV.Drawing
Contents
Description
Module for exposing opencv drawing functions. These are meant for quick and dirty marking and not for anything presentable. For any real drawing you should figure out how to use cairo or related package, such as diagrams. They are way better.
Consult the CV.ImageOp module for functions to apply the operations in this module to images.
- data ShapeStyle
- class Drawable a b where
- type Color a b :: *
- putTextOp :: Color a b -> Float -> String -> (Int, Int) -> ImageOperation a b
- lineOp :: Color a b -> Int -> (Int, Int) -> (Int, Int) -> ImageOperation a b
- circleOp :: Color a b -> (Int, Int) -> Int -> ShapeStyle -> ImageOperation a b
- rectOp :: (BoundingBox bb, Integral (ELBB bb)) => Color a b -> Int -> bb -> ImageOperation a b
- fillPolyOp :: Color a b -> [(Int, Int)] -> ImageOperation a b
- ellipseBoxOp :: Color a b -> C'CvBox2D -> Int -> Int -> ImageOperation a b
- drawLinesOp :: Drawable c d => Color c d -> Int -> [((Int, Int), (Int, Int))] -> ImageOperation c d
- drawBox2Dop :: Drawable c d => Color c d -> C'CvBox2D -> ImageOperation c d
- fillOp :: (Int, Int) -> D32 -> D32 -> D32 -> Bool -> ImageOperation GrayScale D32
- floodfill :: (Int, Int) -> D32 -> D32 -> D32 -> Bool -> Image GrayScale D32 -> Image GrayScale D32
- circle :: Drawable c d => (Int, Int) -> Int -> Color c d -> ShapeStyle -> Image c d -> Image c d
- drawLines :: Drawable c d => Image c d -> Color c d -> Int -> [((Int, Int), (Int, Int))] -> IO (Image c d)
- rectangle :: (BoundingBox bb, Integral (ELBB bb), Drawable c d) => Color c d -> Int -> bb -> Image c d -> IO (Image c d)
- fillPoly :: Drawable c d => Color c d -> [(Int, Int)] -> Image c d -> IO (Image c d)
Drawable class
class Drawable a b where
Typeclass for images that support elementary drawing operations.
Associated Types
type Color a b :: *
Type of the pixel, i.e. Float for a grayscale image and 3-tuple for RGB image.
Methods
putTextOp :: Color a b -> Float -> String -> (Int, Int) -> ImageOperation a b
Put text of certain color to given coordinates. Good size seems to be around 0.5-1.5.
lineOp :: Color a b -> Int -> (Int, Int) -> (Int, Int) -> ImageOperation a b
Draw a line between two points.
circleOp :: Color a b -> (Int, Int) -> Int -> ShapeStyle -> ImageOperation a b
Draw a Circle
rectOp :: (BoundingBox bb, Integral (ELBB bb)) => Color a b -> Int -> bb -> ImageOperation a b
Draw a Rectangle by supplying two corners
fillPolyOp :: Color a b -> [(Int, Int)] -> ImageOperation a b
Draw a filled polygon
ellipseBoxOp :: Color a b -> C'CvBox2D -> Int -> Int -> ImageOperation a b
Extra drawing operations
drawLinesOp :: Drawable c d => Color c d -> Int -> [((Int, Int), (Int, Int))] -> ImageOperation c d
Draw a polyline
drawBox2Dop :: Drawable c d => Color c d -> C'CvBox2D -> ImageOperation c d
Draw C'CvBox2D
Floodfill operations
fillOp :: (Int, Int) -> D32 -> D32 -> D32 -> Bool -> ImageOperation GrayScale D32
Flood fill a region of the image
floodfill :: (Int, Int) -> D32 -> D32 -> D32 -> Bool -> Image GrayScale D32 -> Image GrayScale D32
Apply fillOp to an image
Shorthand for drawing single shapes
circle :: Drawable c d => (Int, Int) -> Int -> Color c d -> ShapeStyle -> Image c d -> Image c d
Apply circleOp to an image
drawLines :: Drawable c d => Image c d -> Color c d -> Int -> [((Int, Int), (Int, Int))] -> IO (Image c d)
Apply drawLinesOp to an image