brfv4_javascript_examples/minimalImage.html at master · webadmin2021/brfv4_javascript_examples · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>

  <meta charset="utf-8">
  <title>Beyond Reality Face - BRFv4 - HTML5/Javascript - minimal image example</title>

  <style>
    html, body { width: 100%; height: 100%; background-color: #ffffff; margin: 0; padding: 0; overflow: hidden; }
  </style>
</head>

<body>

<img    id="_image" src="assets/brfv4_women_young.jpg" style="display: none;"/>
<canvas id="_imageData"></canvas>

<script src="js/utils/BRFv4Stats.js"></script>
<script src="js/BRFv4DemoMinimalImage.js"></script>

<script>

  // BRFv4DemoMinimal.js defines:
  // var handleTrackingResults = function(brfv4, faces, imageDataCtx)
  // var onInitBRFv4 = function(brfv4)
  // Here we overwrite them. The initialization code for BRFv4 should always be similar,
  // that's why we put it into its own file.

  var _brfManager         = null;
  var _resolution         = null;

  onInitBRFv4 = function(
    brfManager,     // api
    resolution
  ) {

    console.log("onInitBRFv4", brfManager);

    _brfManager = brfManager;
    _resolution = resolution;

    brfManager.setNumFacesToTrack(8); // up to eight faces

    // Relax starting conditions to eventually find more faces.

    var maxFaceSize = resolution.height;

    if(resolution.width < resolution.height) {
      maxFaceSize = resolution.width;
    }

    brfManager.setFaceDetectionParams(    maxFaceSize * 0.10, maxFaceSize * 0.50, 12, 8);
    brfManager.setFaceTrackingStartParams(maxFaceSize * 0.05, maxFaceSize * 1.00, 32, 35, 32);
    brfManager.setFaceTrackingResetParams(maxFaceSize * 0.00, maxFaceSize * 1.00, 40, 55, 32);
  };

  handleTrackingResults = function(
    brfv4,          // namespace
    faces,          // tracked faces
    imageDataCtx    // canvas context to draw into
  ) {

    // var allRects    = _brfManager.getAllDetectedFaces();
    var mergedRects = _brfManager.getMergedDetectedFaces();

    // for(var i = 0; i < allRects.length; i++) {
    //
    //   var rect = allRects[i];
    //
    //   console.log(rect);
    //
    //   imageDataCtx.strokeStyle = "#00a0ff";
    //   imageDataCtx.rect(rect.x,rect.y,rect.width,rect.height);
    //   imageDataCtx.stroke();
    // }

    for(var i = 0; i < mergedRects.length; i++) {

      var rect = mergedRects[i];

      imageDataCtx.strokeStyle = "#ffd200";
      imageDataCtx.rect(rect.x,rect.y,rect.width,rect.height);
      imageDataCtx.stroke();
    }

    for(var i = 0; i < faces.length; i++) {

      var face = faces[i];

      if(face.state === brfv4.BRFState.FACE_TRACKING_START ||
        face.state === brfv4.BRFState.FACE_TRACKING) {

        imageDataCtx.strokeStyle = "#00a0ff";

        for(var k = 0; k < face.vertices.length; k += 2) {
          imageDataCtx.beginPath();
          imageDataCtx.arc(face.vertices[k], face.vertices[k + 1], 2, 0, 2 * Math.PI);
          imageDataCtx.stroke();
        }
      }
    }
  };

  onResize = function () {

    // fill whole browser

    var imageData = document.getElementById("_imageData");

    var ww = window.innerWidth;
    var wh = window.innerHeight;

    var s = wh / imageData.height;

    if(imageData.width * s < ww) {
      s = ww / imageData.width;
    }

    var iw = imageData.width * s;
    var ih = imageData.height * s;
    var ix = (ww - iw) * 0.5;
    var iy = (wh - ih) * 0.5;

    imageData.style.transformOrigin = "0% 0%";
    imageData.style.transform = "matrix("+s+", 0, 0, "+s+", "+ix+", "+iy+")";
  };

</script>

</body>

</html>