faces = {
const {width, height} = mural;
const canvas = await faceapi.createCanvasFromMedia(mural);
const ctx = canvas.getContext('2d');
const results = await faceapi
.detectAllFaces(canvas, faceOptions);
faceapi.matchDimensions(canvas, mural);
ctx.drawImage(mural, 0, 0, canvas.width, canvas.height);
faceapi.draw.drawDetections(canvas, faceapi.resizeResults(results, mural));
mutable faceRects = results;
yield canvas;
}