Golang image manipulation: how to mirror and flip images

Golang image operation: how to mirror and flip images

Introduction

In image processing, sometimes it is necessary to mirror and flip images operate. Golang provides many powerful image processing libraries, one of which is github.com/disintegration/imaging, which can help us implement mirroring and flipping operations on images. In this article, I will introduce to you how to use this library to mirror and flip images in Golang.

Installation

First, we need to install the github.com/disintegration/imaging library. It can be installed with the following command:

go get -u github.com/disintegration/imaging

After the installation is complete, we can import this library in our code and start using it.

import (
    "github.com/disintegration/imaging"
)

Mirror operation

First, let’s take a look at how to perform image mirroring operations in Golang. Here, we need to use the imaging.FlipH or imaging.FlipV function to complete. Among them, imaging.FlipH is used for horizontal mirroring, and imaging.FlipV is used for vertical mirroring.

The following is a sample code that demonstrates how to use imaging.FlipH to mirror images horizontally:

package main

import (
    "log"
    "os"

    "github.com/disintegration/imaging"
)

func main() {
    // 打开图片文件
    src, err := imaging.Open("input.jpg")
    if err != nil {
        log.Fatalf("打开图片文件失败：%v", err)
    }

    // 进行水平镜像操作
    flipped := imaging.FlipH(src)

    // 保存镜像后的图片
    err = imaging.Save(flipped, "output.jpg")
    if err != nil {
        log.Fatalf("保存图片文件失败：%v", err)
    }
}

You can name the image you want to mirror. For input.jpg, the above code will mirror it horizontally and save the result as output.jpg.

Flip operation

Next, let’s take a look at how to perform the flip operation of images in Golang. Similar to the mirror operation, we can also use the imaging.FlipH or imaging.FlipV function to complete the flip operation.

The following is a sample code that demonstrates how to use imaging.FlipV to flip the image vertically:

package main

import (
    "log"
    "os"

    "github.com/disintegration/imaging"
)

func main() {
    // 打开图片文件
    src, err := imaging.Open("input.jpg")
    if err != nil {
        log.Fatalf("打开图片文件失败：%v", err)
    }

    // 进行垂直翻转操作
    flipped := imaging.FlipV(src)

    // 保存翻转后的图片
    err = imaging.Save(flipped, "output.jpg")
    if err != nil {
        log.Fatalf("保存图片文件失败：%v", err)
    }
}

Similarly, you can flip the image you want to flip The image is named input.jpg. The above code will flip it vertically and save the result as output.jpg.

Summary

In this article, we introduced how to use the github.com/disintegration/imaging library to implement image mirroring and flipping operations in Golang. With the above code example, we can easily mirror the image horizontally and flip it vertically. I hope this article will be helpful to your image processing work!

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