go语言对图像的缩放

package main
import (
"github.com/nfnt/resize"
	"image/png"
	"log"
"os"
)

func main() {
    
    
	// open "test.jpg"
	file, err := os.Open("C:\\Users\\wg\\go\\src\\学习go语言\\预处理\\家人们.png")
	if err != nil {
    
    
		log.Fatal(err)
	}

	// decode jpeg into image.Image
	img, err := png.Decode(file)//jpg和png的格式不一样
	if err != nil {
    
    
		log.Fatal(err)
	}
	file.Close()

	// resize to width 1000 using Lanczos resampling
	// and preserve aspect ratio
	m := resize.Resize(44, 23, img, resize.Lanczos3)//这里参数自己设定

	out, err := os.Create("test_resized.png")
	if err != nil {
    
    
		log.Fatal(err)
	}
	defer out.Close()

	// write new image to file
	png.Encode(out, m)//jpeg里面三个参数
}

第一步要 go get github.com/nfnt/resize