Vision.Image.Interpolate

Provides a way to estimate the value of a pixel at rational coordinates using a linear interpolation.

Documentation

class Interpolable p where

Provides a way to apply the interpolation to every component of a pixel.

Methods

interpol :: (PixelChannel p -> PixelChannel p -> PixelChannel p) -> p -> p -> p

Given a function which interpolates two points over a single channel, returns a function which interpolates two points over every channel of two pixels.

Instances

Interpolable Bool

Interpolable Double

Interpolable Float

Interpolable Int

Interpolable Int16

Interpolable Int32

Interpolable Word

Interpolable Word8

Interpolable Word16

Interpolable Word32

Interpolable GreyPixel

Interpolable HSVPixel

Interpolable RGBAPixel

Interpolable RGBPixel

bilinearInterpol :: (Image i, Interpolable (ImagePixel i), Integral (ImageChannel i)) => i -> RPoint -> ImagePixel i

Uses a bilinear interpolation to find the value of the pixel at the rational coordinates.

Estimates the value of a rational point p using a, b, c and d :

      x1       x2

y1    a ------ b
      -        -
      -  p     -
      -        -
y2    c ------ d