CV.Filters

This module is a collection of various image filters

Documentation

gaussian, blurNS, blur :: (Int, Int) -> Image GrayScale D32 -> Image GrayScale D32

Create a new image by applying gaussian, or uniform smoothing.

gaussianOp, blurOp :: (Int, Int) -> ImageOperation GrayScale D32

Image operation which applies gaussian or unifarm smoothing with a given window size to the image.

bilateral :: (Int, Int) -> (Int, Int) -> Image a D8 -> Image a D8

Apply bilateral filtering

class HasMedianFiltering a where

Methods

median :: (Int, Int) -> a -> a

Instances

HasMedianFiltering (Image RGB D8)

HasMedianFiltering (Image GrayScale D8)

susan :: (Int, Int) -> Double -> Double -> Image GrayScale D32 -> Image GrayScale D32

SUSAN adaptive smoothing filter, see http://users.fmrib.ox.ac.uk/~steve/susan/susan/susan.html

getCentralMoment :: CInt -> (CInt, CInt) -> Image c d -> Image channels depth

getAbsCentralMoment :: CInt -> (CInt, CInt) -> Image c d -> Image channels depth

getMoment :: CInt -> (CInt, CInt) -> Image c d -> Image channels depth

secondMomentBinarize :: CDouble -> Image c d -> Image c d

secondMomentBinarizeOp :: CDouble -> ImageOperation c d

secondMomentAdaptiveBinarize :: CInt -> CInt -> CDouble -> Image c d -> Image c d

secondMomentAdaptiveBinarizeOp :: CInt -> CInt -> CDouble -> ImageOperation c d

selectiveAvg :: (Int, Int) -> Double -> Image GrayScale D32 -> Image GrayScale D32

A selective average filter is an edge preserving noise reduction filter. It is a standard gaussian filter which ignores pixel values that are more than a given threshold away from the filtered pixel value.

convolve2D :: (Point2D anchor, ELP anchor ~ Int) => Matrix D32 -> anchor -> Image GrayScale D32 -> Image GrayScale D32

convolve2DI :: (CInt, CInt) -> Image c1 d1 -> Image c d -> Image channels depth

haar :: IntegralImage -> (Int, Int, Int, Int) -> Image GrayScale D32

Filter the image with box shaped averaging mask.

haarAt :: IntegralImage -> (Int, Int, Int, Int) -> Double

Get an average of a given region.

data IntegralImage

 A type for storing integral images. Integral image stores for every pixel the sum of pixels above and left of it. Such images are used for significantly accelerating the calculation of area averages.

Instances

GetPixel IntegralImage

Sized IntegralImage

integralImage :: Image GrayScale D32 -> IntegralImage

 Calculate the integral image from the given image.

verticalAverage :: Image GrayScale D32 -> Image GrayScale D32

Replace pixel values by the average of the row.