channel

Documentation

Overview

Package channel provides image channel separation and manipulation functions.

Index

• Constants
• func Extract(img image.Image, c Channel) *image.Gray
• func ExtractMultiple(img image.Image, channels ...Channel) *image.RGBA
• type Channel

Constants

const (
	Red = iota
	Green
	Blue
	Alpha
)

Channel identifiers

Functions

func Extract

func Extract(img image.Image, c Channel) *image.Gray

Extract returns a grayscale image containing the values of the selected channel.

Usage example:

result := channel.Extract(img, channel.Alpha)

func ExtractMultiple

func ExtractMultiple(img image.Image, channels ...Channel) *image.RGBA

ExtractMultiple returns a RGBA image containing the values of the selected channels.

Usage example:

result := channel.ExtractMultiple(img, channel.Blue, channel.Alpha)

Types

type Channel

type Channel int

Channel identifier for RGBA images