code: function(rect) {
              var imageRadius = 0,
                  imagePoint = {
                  x: rect.x,
                  y: rect.y
              };
  
              if (rect.width / this._image.w > 0.45) {
                  // Feature point (face) takes up a large portion of the image
                  rect.height *= 1.2;
  
                  imagePoint.x += rect.width / 2;
                  imagePoint.y += rect.height / 2;
  
                  if (rect.height > rect.width) {
                      imageRadius = rect.height / 2;
                  }
                  else {
                      imageRadius = rect.width / 2;
                  }
              }
              else {
                  // Feature point (face) takes up less of the image
                  rect.height *= 1.4;
  
                  imagePoint.x += rect.width / 2;
                  imagePoint.y += rect.height / 4;
  
                  if (rect.height > rect.width) {
                      imageRadius = rect.height / 2;
                  }
                  else {
                      imageRadius = rect.width / 2;
                  }
              }
  
              this._image.addFocusPoint(imagePoint, imageRadius);
          }
docs: Add a feature point with radius.
  
  Heads are important and therefore we naïvely assume features to be faces. Heads
  are larger so we need to increase rect height about 40% and then move the y point
  so that the forehead can be covered by the full focus point.
  
  Then again. If the face covers more than a certain percent of the image (closeup)
  we do not want to enlarge the feature point radius that much.
  @param rect