UE配置opencv插件

环境：Windows10+UE4.24.2+opencv3.4.9+vs2019

网上的教程版本比较旧，试了一遍，编译报错。

步骤1：创建OpenCV新插件。

打开UE->编辑->插件->新插件,选择第三方库，插件名称OpenCV，点击创建插件，会在项目的目录下创建一个Plugins/OpenCV文件。OpenCV目录下的文件如下图所示。

步骤2：文件拷贝。

在官网下载opencv并解压。

将opencv_world349.lib、opencv_world340d.lib、opencv_ffmpeg349_64.dll、opencv_world349.dll拷贝至.\Plugins\OpenCV\Binaries\ThirdParty\OpenCVLibrary\Win64\  目录下。

将opencv_world349.lib、opencv_world340d.lib、opencv_ffmpeg349_64.dll、opencv_world349.dll、opencv_world349.pdb、opencv_world349d.pdb拷贝至.\Plugins\OpenCV\Binaries\Win64目录下。

将解压后的include文件夹拷贝至.\Plugins\OpenCV\Binaries\ThirdParty目录下和.\Plugins\OpenCV\Source\ThirdParty\OpenCV目录下。

将解压后.\opencv\build\x64\vc15\lib和.\opencv\build\x64\vc15\bin里的文件（根据自己使用的cv14还是cv15找对应目录）拷到.\Plugins\OpenCV\Source\ThirdParty\OpenCV\OpenCVLibrary\x64\Release。

步骤3：更改OpenCV.Build.cs文件。

该文件位于.\Plugins\OpenCV\Source\OpenCV下。更改后如下：

// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

using UnrealBuildTool;
using System.IO;

public class OpenCV : ModuleRules
{
	private string ThirdPartyPath 
	{ 
		get 
		{ 
			return Path.GetFullPath(Path.Combine(ModuleDirectory, "../ThirdParty")); 
		} 
	}

	public OpenCV(ReadOnlyTargetRules Target) : base(Target)
	{
		PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;
		
		PublicIncludePaths.AddRange(
			new string[] {
				// ... add public include paths required here ...
			}
			);
				
		
		PrivateIncludePaths.AddRange(
			new string[] {
				// ... add other private include paths required here ...
			}
			);
			
		
		PublicDependencyModuleNames.AddRange(
			new string[]
			{
				"Core",
				"OpenCVLibrary",
				"Projects",
				"CoreUObject",
				"Engine",
				"InputCore",
				"OpenCV"
				// ... add other public dependencies that you statically link with here ...
			}
			);
			
		
		PrivateDependencyModuleNames.AddRange(
			new string[]
			{
				"CoreUObject",
				"Engine",
				"Slate",
				"SlateCore"
				// ... add private dependencies that you statically link with here ...	
			}
			);
		
		
		DynamicallyLoadedModuleNames.AddRange(
			new string[]
			{
				// ... add any modules that your module loads dynamically here ...
			}
			);
		string OpenCVPath = Path.Combine(ThirdPartyPath, "OpenCV");
		if (Target.Platform == UnrealTargetPlatform.Win64)//64位平台 
        {
			string OpenCVIncludePath = Path.Combine(OpenCVPath, "Include");
			string OpenCVLibPath = Path.Combine(OpenCVPath, "OpenCVLibrary", "x64", "Release");
			PublicIncludePaths.Add(OpenCVIncludePath);
			PublicLibraryPaths.Add(OpenCVLibPath);
			//Add Static Libraries
			PublicAdditionalLibraries.Add("opencv_world349.lib");
			PublicAdditionalLibraries.Add("opencv_world349d.lib");
			
			//Add Dynamic Libraries
			PublicDelayLoadDLLs.Add("opencv_world349.dll");
			PublicDelayLoadDLLs.Add("opencv_ffmpeg349_64.dll");
		}
		else if (Target.Platform == UnrealTargetPlatform.Win32)  //32位平台
        {
			//32位的OpenCV库,仿照上面Win64的自己填写 
		}
		else if (Target.Platform == UnrealTargetPlatform.Mac)
        {
			//Mac
        }
	}
}

步骤4：更改包含目录。

选择项目->属性->C++目录->包含目录，添加include目录。

步骤5：编译。

在UE里编译看是否会报错。编译的时间可能会比较长，耐心等待。

 

以上就是配置全过程。下一篇将介绍如何在UE中基于C++调用opencv库，实现图像视频的处理。

参考：

https://www.jianshu.com/p/953fe8beee1f

资源：

只包含opencv的build文件，不包含source，请谨慎下载。(如资源不能下载，请联系我，将更新链接）也可到官网自行下载。