grayscale

Documentation

Overview

Package grayscale provides function to grayscale an image.

Index

• type Image
  • func FromReader(r io.Reader) (*Image, error)
  • func (g *Image) At(x, y int) color.Color
  • func (g *Image) ColorModel() color.Model
  • func (g *Image) ToJPEG() (*bytes.Buffer, error)

Types

type Image

type Image struct {
	image.Image
}

Image represents a grayscaled image.

func FromReader

func FromReader(r io.Reader) (*Image, error)

FromReader grayscales an image from original raw data (r).

Note that you need to blank import image type packages in order to be able to decode them in this function, for example:

import (
  _ "image/gif"
  _ "image/jpeg"
  _ "image/png"
)

func (*Image) At

func (g *Image) At(x, y int) color.Color

At overrides the original At with color.Gray16Model conversion applied.

func (*Image) ColorModel

func (g *Image) ColorModel() color.Model

ColorModel overrides the original ColorModel with color.Gray16Model.

func (*Image) ToJPEG

func (g *Image) ToJPEG() (*bytes.Buffer, error)

ToJPEG encodes the image to JPEG with default quality.