channel

Documentation

Overview

Package channel provides functions to alter the values of separate color channels in an image.

Index

• Variables
• func Adjust(img image.Image, adj utils.Adjuster, chs ...Channel) image.Image
• func AdjustC(adj utils.Adjuster, chs ...Channel) utils.Composable
• type Channel

Variables

var (
	Red        = redCh{}
	Green      = greenCh{}
	Blue       = blueCh{}
	Alpha      = alphaCh{}
	Hue        = hueCh{}
	Saturation = saturationCh{}
	Lightness  = lightnessCh{}
	Intensity  = intensityCh{}

	// Alias
	Brightness = Intensity
)

Functions

func Adjust

func Adjust(img image.Image, adj utils.Adjuster, chs ...Channel) image.Image

Adjust applies the given Adjuster to the Image on only the Channels specified.

func AdjustC

func AdjustC(adj utils.Adjuster, chs ...Channel) utils.Composable

AdjustC returns a Composable function that applies the given Adjuster to the Channels.

Types

type Channel

type Channel interface {
	Get(color.Color) float64
	Set(color.Color, float64) color.Color
}

A Channel provides Get and Set methods, for accessing and modifying the value of a Color in the corresponding color channel. Get and Set both work on values in the range [0,1]; that is, the value of the channel will be scaled to be in that range.