In this tutorial, we will learn how to find the size of an image in Go. We will cover the basic concept of image processing and use the 'image' and 'os' packages to get the dimensions of an image.
Image processing involves performing operations on images to extract useful information or to modify the image in some way. Finding the size of an image is a common task in image processing.
The syntax to find the size of an image in Go using the 'image' and 'os' packages is:
import (
"fmt"
"image"
_ "image/jpeg"
_ "image/png"
"os"
)
func getImageSize(filePath string) (int, int, error) {
file, err := os.Open(filePath)
if err != nil {
return 0, 0, err
}
defer file.Close()
img, _, err := image.DecodeConfig(file)
if err != nil {
return 0, 0, err
}
return img.Width, img.Height, nil
}
We can create a function to find the size of an image by opening the image file and getting its dimensions using the 'image' and 'os' packages.
For example,
fmt
, image
, os
packages and the image formats you need to support (e.g., _ "image/jpeg"
, _ "image/png"
).getImageSize
that takes one parameter filePath
of type string
and returns the width, height, and an error.os.Open
to open the image file. If an error occurs, return 0, 0, and the error.defer
to close the file after the function completes.image.DecodeConfig
to decode the image configuration and get the width and height. If an error occurs, return 0, 0, and the error.getImageSize
function with a sample image file path and print the result.package main
import (
"fmt"
"image"
_ "image/jpeg"
_ "image/png"
"os"
)
func getImageSize(filePath string) (int, int, error) {
file, err := os.Open(filePath)
if err != nil {
return 0, 0, err
}
defer file.Close()
img, _, err := image.DecodeConfig(file)
if err != nil {
return 0, 0, err
}
return img.Width, img.Height, nil
}
func main() {
// Sample image file path
imagePath := "sample_image.jpg"
// Get the size of the image
width, height, err := getImageSize(imagePath)
if err != nil {
fmt.Println("Error:", err)
return
}
// Print the result
fmt.Printf("Size of the image is: %dx%d\n", width, height)
}
Size of the image is: 1024x768