face-api.js/build/es6/mtcnn/pyramidDown.js

JavaScript API for face detection and face recognition in the browser with tensorflow.js

import { CELL_SIZE } from './config';
export function pyramidDown(minFaceSize, scaleFactor, dims) {
    var height = dims[0], width = dims[1];
    var m = CELL_SIZE / minFaceSize;
    var scales = [];
    var minLayer = Math.min(height, width) * m;
    var exp = 0;
    while (minLayer >= 12) {
        scales.push(m * Math.pow(scaleFactor, exp));
        minLayer = minLayer * scaleFactor;
        exp += 1;
    }
    return scales;
}
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