Golang : Crop image
This is a continuation from the previous tutorial on how to resize image in Golang. For this tutorial, we will learn how easy it is to crop image with the excellent https://github.com/disintegration/imaging package.
This code below will create two images. One which is cropped from center point and another cropped according to the defined rectangular region.
package main
import (
"fmt"
"github.com/disintegration/imaging"
"os"
"runtime"
"image"
)
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)
}
// crop from center
centercropimg := imaging.CropCenter(img, 300, 300)
// save cropped image
err = imaging.Save(centercropimg, "./centercrop.jpg")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// crop out a rectangular region
rectcropimg := imaging.Crop(img, image.Rect(0, 0, 500, 500))
// save cropped image
err = imaging.Save(rectcropimg, "./rectcrop.jpg")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// everything ok
fmt.Println("Done")
}
Big.jpg(original)
Centercrop.jpg
Rectcrop.jpg
For more information and other functions to manipulate images, please see http://godoc.org/github.com/disintegration/imaging
See also : Golang : Resize Image
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
Tutorials
+18.2k Golang : Example for DSA(Digital Signature Algorithm) package functions
+4.2k Python : Convert(cast) string to bytes example
+9.9k Golang : Create S3 bucket with official aws-sdk-go package
+5.2k Golang : How to solve "too many .rsrc sections" error?
+5.6k Golang : When to use make or new?
+17.3k Golang : Check whether a network interface is up on your machine
+21.6k Golang : Calculate time different
+9.5k Golang : Create matrix with Gonum Matrix package example
+13.9k Golang : Find location by IP address and display with Google Map
+12.6k Golang : Gin framework accept query string by post request example
+12.5k Golang : How to check if a file is hidden?
+21.7k Golang : Randomly pick an item from a slice/array example