在上安装OpenCV

Question

我正试图在我的Mac上安装OpenCV，使用本教程：https://medium.com/macoclock/setting-up-mac-for-opencv-java-development-with-intellij-idea-fd2153eb634f

当我这么做时：

brew安装opencv

我收到：

==> Searching for similarly named formulae... 
These similarly named formulae were found: 
opencv                     opencv@2               opencv@3 
To install one of them, run (for example):   
brew install opencv 
Error: No available formula or cask with the name "opencv".
==> Searching taps on GitHub... 
Error: No formulae found in taps.

它显示"opencv“公式，那么它为什么不安装它呢？怎么修？

我还做了以下工作：

> xcode-select --install
xcode-select: error: command line tools are already installed, use "Software Update" to install updates

和

> brew install ant
Warning: ant 1.10.9 is already installed and up-to-date
To reinstall 1.10.9, run `brew reinstall ant`

当尝试

brew安装-从源代码构建opencv

然后接收相同的错误。

也曾尝试过：

> brew uninstall opencv
Error: No available formula or cask with the name "opencv".

Answer 1

显然，通过自制的方式安装OpenCV比通过brew install opencv安装更多。

您需要确保安装了XCode命令行工具以及ANT。那你就得跑

brew install --build-from-source opencv

有关细节和细节，请查看文档。

这也可能是一个自制的问题-所以更新brew并运行医生。

Answer 2

我找到了让OpenCV通过Maven的更简单的方法。

添加到pom.xml中：

<dependencies>
    <!-- https://mvnrepository.com/artifact/org.openpnp/opencv -->
    <dependency>
        <groupId>org.openpnp</groupId>
        <artifactId>opencv</artifactId>
        <version>4.3.0-3</version>
    </dependency>
</dependencies>

添加依赖项后，需要加载库以供使用。通常，您会使用以下一行：

System.loadLibrary(Core.NATIVE_LIBRARY_NAME); 

但是，它将不能使用此方法。您需要将其更改为以下一行之一：

nu.pattern.OpenCV.loadShared();
nu.pattern.OpenCV.loadLocally(); // Use in case loadShared() doesn't work

因此，最终的测试结果是：

import org.opencv.core.Core;

public class HelloCV {
    static {
        nu.pattern.OpenCV.loadShared();
        // nu.pattern.OpenCV.loadLocally(); // Use in case loadShared() doesn't work
    }

    public static void main(String[] args) {
        System.out.println(Core.VERSION);
        System.out.println(Core.VERSION_MAJOR);
        System.out.println(Core.VERSION_MINOR);
        System.out.println(Core.VERSION_REVISION);
        System.out.println(Core.NATIVE_LIBRARY_NAME);
        System.out.println(Core.getBuildInformation());
    }
}