23 lines
712 B
JavaScript
23 lines
712 B
JavaScript
/* detect.js — tuned ArUco 4x4 detection.
|
|
* Phantom-ID fix: reject any marker decoded with hamming distance > 0 (maxHamming: 0).
|
|
*/
|
|
export function createDetector() {
|
|
return new AR.Detector({ dictionaryName: 'ARUCO_4X4_1000', maxHammingDistance: 0 });
|
|
}
|
|
|
|
export function detectMarkers(detector, imageData, knownIds) {
|
|
const markers = detector.detect(imageData);
|
|
// keep only markers that exist in the scene, with sane geometry
|
|
return markers.filter(m => knownIds.has(m.id) && quadArea(m.corners) > 100);
|
|
}
|
|
|
|
export function quadArea(c) {
|
|
// shoelace
|
|
let a = 0;
|
|
for (let i = 0; i < 4; i++) {
|
|
const p = c[i], q = c[(i + 1) % 4];
|
|
a += p.x * q.y - q.x * p.y;
|
|
}
|
|
return Math.abs(a) / 2;
|
|
}
|