the predictions are an empty array even if my hand is visible in the camera

[khldon123]

this is my code:
`
Navigator.getUserMedia =
Navigator.getUserMedia ||
Navigator.webkitUserMedia ||
Navigator.mozUserMedia ||
Navigator.msUserMedia;
const modelParams = {
flipHorizontal: true, // flip e.g for video
imageScaleFactor: 0.7, // reduce input image size for gains in speed.
maxNumBoxes: 20, // maximum number of boxes to detect
iouThreshold: 0.5, // ioU threshold for non-max suppression
scoreThreshold: 0.79, // confidence threshold for predictions.
};

const video = document.querySelector("#video");
const audio = document.querySelector("#audio");
const canvas = document.querySelector("canvas");
const context = canvas.getContext("2d");
let model;
handTrack.startVidseo(video)
.then((status) => {
if (status) {
navigator.getUserMedia(
{ video: {} },
(stream) => {
video.srcObject = stream;
setInterval(doTheDetection, 1000);
},
(err) => console.log(err)
);
}
});
function doTheDetection() {

model.detect(video)
.then(pred => {
    console.log(pred);
});

}
handTrack.load(modelParams).then((lmodel) => {
model = lmodel;
`});````

this is the result: