Golang's method of achieving image quality compression

With the rapid development of the Internet, pictures have become one of the important media for people to communicate and transmit information online. However, high-resolution images not only take up a lot of storage space, but also increase the loading time during network transmission, which has a certain impact on the user experience. Therefore, in practical applications, image compression is a very meaningful task. This article will introduce how to use Golang to compress image quality.

First, we need to import Golang’s graphics processing library github.com/disintegration/imaging. This library provides a series of functions for processing images, including image quality compression.

The following is a simple sample code that shows how to use Golang to perform quality compression on images:

package main

import (
    "github.com/disintegration/imaging"
    "image/jpeg"
    "os"
)

func main() {
    // 打開原圖片文件
    file, err := os.Open("input.jpg")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    // 將文件內容解碼成圖像對象
    img, err := jpeg.Decode(file)
    if err != nil {
        panic(err)
    }

    // 壓縮圖片質量并保存
    err = imaging.Save(qualityCompression(img, 80), "output.jpg")
    if err != nil {
        panic(err)
    }
}

// 圖片質量壓縮函數
func qualityCompression(img image.Image, quality int) *image.NRGBA {
    // 調整圖片質量
    return imaging.Encode(img, imaging.JPEGQuality(quality))
}

In the above code, we first introduce the necessary libraries. Then, open the original image file through the os.Open function, and then use the jpeg.Decode function to decode the file content into an image object. Next, we call the qualityCompression function to perform quality compression on the original image object. In the qualityCompression function, we first use the imaging.Encode function to encode the original image object into JPEG format, and set the compression quality size through the imaging.JPEGQuality function, and finally save the compressed image object.

In terms of compression quality settings, we can adjust the compression quality by setting the quality parameter. Generally speaking, the value range of quality is 1 to 100. The larger the value, the better the compression quality, but the file size will also become larger.

It should be noted that the above sample code only shows the quality compression method for JPEG format images. If you need to compress images in other formats, you can use a similar method. You only need to make corresponding changes to the file opening, decoding, saving and other operations.

To summarize, this article introduces how to use Golang to compress image quality and provides a simple sample code. By performing quality compression on images, you can reduce the image file size while ensuring the display effect of the image. I hope this article can help you deal with image compression problems in practical applications.

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