how to use QrScanner.scanImage() method in web worker.

[samhuang1111]

I want to scale the image and then scan qr code. because my qr code distance my camera is some far.

I need to scan the whole size image.

QrScanner.scanImage() handler too much time. cause main thread blocking

but web worekr not use "window" object.

i try use

const qrScanner = new QrScanner(
    videoElem,
    result => console.log('decoded qr code:', result),
    { /* your options or returnDetailedScanResult: true if you're not specifying any other options */ },
);

but this not suppot scale input frame image size