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 isgithub.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 thegithub.com/disintegration/imaginglibrary. 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 theimaging.FlipHorimaging.FlipVfunction to complete. Among them,imaging.FlipHis used for horizontal mirroring, andimaging.FlipVis used for vertical mirroring.

The following is a sample code that demonstrates how to useimaging.FlipHto 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. Forinput.jpg, the above code will mirror it horizontally and save the result asoutput.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 theimaging.FlipHorimaging.FlipVfunction to complete the flip operation.

The following is a sample code that demonstrates how to useimaging.FlipVto 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 namedinput.jpg. The above code will flip it vertically and save the result asoutput.jpg.

Summary

In this article, we introduced how to use thegithub.com/disintegration/imaginglibrary 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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