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Hello OpenCV.js         Chess.js     OpenCV.js is loading...                                     imageSrc                                     canvasOutput                       Please explain in details the meaning and function of each coding HTML as above example?

Hello OpenCV.js         Chess.js     OpenCV.js is loading...                                     imageSrc                                     canvasOutput                       Please explain in details the meaning and function of each coding HTML as above example?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Hello OpenCV.js</title>
  </head>
  <body>
    <h2>Chess.js</h2>
    <p id="status">OpenCV.js is loading...</p>
    <div>
      <div class="inputoutput">
        <img id="imageSrc" alt="No Image" , width="200" />
        <div class="caption">
          imageSrc <input type="file" id="fileInput" name="file" />
        </div>
      </div>
      <div class="inputoutput">
        <canvas id="canvasOutput"></canvas>
        <div class="caption">canvasOutput</div>
      </div>
    </div>
    <script type="text/javascript">
      let imgElement = document.getElementById("imageSrc");
      let inputElement = document.getElementById("fileInput");
      inputElement.addEventListener(
        "change",
        (e) => {
          imgElement.src = URL.createObjectURL(e.target.files[0]);
        },
        false
      );

      imgElement.onload = function () {
        let mat = cv.imread(imgElement);
        cv.imshow("canvasOutput", mat);
        mat.delete();
      };
      var Module = {
        // https://emscripten.org/docs/api_reference/module.html#Module.onRuntimeInitialized
        onRuntimeInitialized() {
          document.getElementById("status").innerHTML = "OpenCV.js is ready.";
        },
      };
    </script>
    <script async src="opencv.js" type="text/javascript"></script>
  </body>
</html>
 
Please explain in details the meaning and function of each coding HTML as above example?
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