如何将OpenCV与离子3集成?

实际上,您可以引入一种opencv.js框架。我做这件事的方式是把一些参考资料 https://docs.opencv.org/3.4.1/opencv.js ,然后将其托管在某个地方(以防opencv将其移动到您身上)。然后在离子工程中加入这个脚本。不过,你要小心。这是一个大文件,因此可能需要更长的时间来加载应用程序。我使用过的一些选项:

本地资产

<script src="assets/js/opencv.js" async></script>

动态加载文件(下面的示例)

async ionViewDidLoad() {

    let loadingScreen = this.loadingCtrl.create({ content: "Loading Scripts. Please Wait..." });

    //Show loading screen & load scripts
    try {
      await loadingScreen.present();
      await this.loadScript();
    }
    catch (error) {
      this.errorMessage = "We had some trouble loading scripts...";
    }
    finally {
      loadingScreen && loadingScreen.dismiss();
    }
}


public loadScript(): Promise<any> {
    return new Promise((resolve, reject) => {
      var isFound = false;
      var scripts = document.getElementsByTagName("script")
      for (var i = 0; i < scripts.length; ++i) {
        if (scripts[i].getAttribute('src') != null && 
scripts[i].getAttribute('src').includes("opencv")) {
          isFound = true;
          return resolve();
        }
      }

      if (!isFound) {
        var dynamicScripts = ["https://docs.opencv.org/3.4.1/opencv.js"];

        for (var i = 0; i < dynamicScripts.length; i++) {
          let scriptNode = document.createElement('script');
          scriptNode.src = dynamicScripts[i];
          scriptNode.type = 'text/javascript';
          scriptNode.async = false;
          scriptNode.charset = 'utf-8';
          document.getElementsByTagName('head')[0].appendChild(scriptNode);

          scriptNode.onload = resolve;
        }
      }
    });
}