halftone

type ConvertFunc ¶

type ConvertFunc func(color.Color) color.Gray

type Ditherer ¶

type Ditherer interface {
	Run(gray *image.Gray) *image.Gray
}

A Ditherer convert a grayscale image with intensities going from 0 (black) to 255 (white) into a black and white image.

type FloydSteinbergDitherer ¶

type FloydSteinbergDitherer struct{}

func (dith FloydSteinbergDitherer) Run(gray *image.Gray) *image.Gray

type Format ¶

type Format int

const (
	JPEG Format = iota
	PNG
	GIF
	TIFF
	BMP
)

func (f Format) String() string

type GridDitherer ¶

type GridDitherer struct {
	// contains filtered or unexported fields
}

GridDitherer implements Bosch and Herman's grid-based method.

func NewGridDitherer(cellSize int, a, b float64, rand *rand.Rand) GridDitherer

func (dith GridDitherer) Run(gray *image.Gray) *image.Gray

type ImageConverter ¶

type ImageConverter struct {
}

func NewImageConverter() *ImageConverter

func (ic *ImageConverter) ConvertToGray(m image.Image) *image.Gray

type ImageWorker ¶

type ImageWorker struct {
}

func NewImageWorker() *ImageWorker

func (w *ImageWorker) GetImageDemensions(image image.Image) (int, int)

func (w *ImageWorker) LoadImage(path string) (image.Image, error)

func (w *ImageWorker) SaveImage(path string, i image.Image)

type ThresholdDitherer ¶

type ThresholdDitherer struct {
	// contains filtered or unexported fields
}

ThresholdDitherer converts each pixel in a grayscale image to black or white depending on the intensity of the pixel.

func NewThresholdDitherer(th uint8) ThresholdDitherer

func (dith ThresholdDitherer) Run(gray *image.Gray) *image.Gray