blur

package

v0.0.0-...-6cd0f2a Latest Latest Go to latest Published: May 1, 2015 License: MIT Imports: 5 Imported by: 1

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Repository

github.com/hawx/img

Links

Open Source Insights

Documentation ¶

Overview ¶

Package blur provides functions for blurring images.

Index ¶

func Box(in image.Image, radius int, style Style) image.Image
func Convolve(in image.Image, weights Kernel, style Style) image.Image
func Convolve2(in image.Image, a, b Kernel, style Style) image.Image
func Gaussian(in image.Image, radius int, sigma float64, style Style) image.Image
type Kernel
type Style

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func Box ¶

func Box(in image.Image, radius int, style Style) image.Image

Box performs a box blur on the Image given.

func Convolve ¶

func Convolve(in image.Image, weights Kernel, style Style) image.Image

func Convolve2 ¶

func Convolve2(in image.Image, a, b Kernel, style Style) image.Image

Perform a convolution with two Kernels in succession.

func Gaussian ¶

func Gaussian(in image.Image, radius int, sigma float64, style Style) image.Image

Gaussian performs a gaussian blur on the Image given.

Types ¶

type Kernel ¶

type Kernel [][]float64

A Kernel is a 2-dimensional array of ratios. A 1-dimensional, horizontal or vertical, kernel can easily be defined by a 2-dimensional array in the obvious manner. The weights are taken as row by column, so kernel[0] references the first row and kernel[i][0] (for all i) is the first column.

func NewHorizontalKernel ¶

func NewHorizontalKernel(width int, f func(x int) float64) Kernel

func NewKernel ¶

func NewKernel(height, width int, f func(x, y int) float64) Kernel

NewKernel creates a new Kernel of the dimensions given, it is populated by the given function which itself is passed the signed x and y offsets from the mid point.

func NewVerticalKernel ¶

func NewVerticalKernel(height int, f func(y int) float64) Kernel

func (Kernel) Height ¶

func (k Kernel) Height() int

Height returns the height of the Kernel.

func (Kernel) Mid ¶

func (k Kernel) Mid() image.Point

Mid returns the centre Point of the Kernel.

func (Kernel) Normalised ¶

func (k Kernel) Normalised() Kernel

Normalised returns a copy of the Kernel where the sum of all entries is 1.

func (Kernel) Width ¶

func (k Kernel) Width() int

Width returns the width of the Kernel.

type Style ¶

type Style float64

const (
	// Ignore edges, may leave them semi-transparent
	IGNORE Style = iota
	// Clamp edges, may leave them looking unblurred
	CLAMP
	// Wrap edges, may change colour of edges
	WRAP
)

Source Files ¶

View all Source files

blur.go

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