Golang React JS Technology Blog

How to create thumbnail of an image?

In dstImage the size 80 X 80 passed to create thumbnail of 80px 80px. Google graphics package used to generate thumbnail of image.

Example

package main

import (    
    "os"    
    "image"
    "image/jpeg"
    "code.google.com/p/graphics-go/graphics"
)

func main() {
    imagePath, _ := os.Open("jellyfish.jpg")
    defer imagePath.Close()
    srcImage, _, _ := image.Decode(imagePath)

	// Dimension of new thumbnail 80 X 80	
	dstImage := image.NewRGBA(image.Rect(0, 0, 80, 80))
	// Thumbnail function of Graphics
	graphics.Thumbnail(dstImage, srcImage)
	
	newImage, _ := os.Create("thumbnail.jpg")
    defer newImage.Close()
    jpeg.Encode(newImage, dstImage, &jpeg.Options{jpeg.DefaultQuality})	
}
Most Helpful This Week
How to check if a string contains certain characters in Golang? Split a string at uppercase letters using regular expression in Golang Convert Int data type to Int16 Int32 Int64 Regular expression for matching HH:MM time format in Golang How to Unmarshal nested JSON structure? Replace first occurrence of string using Regexp Anonymous Functions in Golang Converting Int data type to Float in Go Closures Functions in Golang Golang import package inside package