Golang : Grayscale Image




Another feature that I like about this Disintegration Imaging package is the ability to generate grayscaled image. The codes below will demonstrate how to quickly turn an image into grayscale version.

 package main

 import (
 "fmt"
 "github.com/disintegration/imaging"
 "os"
 "runtime"
 )

 func main() {

 // maximize CPU usage for maximum performance
 runtime.GOMAXPROCS(runtime.NumCPU())

 // load original image
 img, err := imaging.Open("./big.jpg")

 if err != nil {
 fmt.Println(err)
 os.Exit(1)
 }

 // grayscale the image
 grayimg := imaging.Grayscale(img)

 // save grayscaled image
 err = imaging.Save(grayimg, "./grayscaled.png")

 if err != nil {
 fmt.Println(err)
 os.Exit(1)
 }

 // everything ok
 fmt.Println("Done")
 }

big.jpg big.jpg

grayscaled.png grayscaled.png

References :

https://www.socketloop.com/tutorials/golang-resize-image

https://github.com/disintegration/imaging

  See also : Golang : Generate thumbnails from images





By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


Advertisement