face-api.js/build/es6/dom/imageTensorToCanvas.js

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

import { __awaiter, __generator } from "tslib";
import * as tf from '@tensorflow/tfjs-core';
import { env } from '../env';
import { isTensor4D } from '../utils';
export function imageTensorToCanvas(imgTensor, canvas) {
    return __awaiter(this, void 0, void 0, function () {
        var targetCanvas, _a, height, width, numChannels, imgTensor3D;
        return __generator(this, function (_b) {
            switch (_b.label) {
                case 0:
                    targetCanvas = canvas || env.getEnv().createCanvasElement();
                    _a = imgTensor.shape.slice(isTensor4D(imgTensor) ? 1 : 0), height = _a[0], width = _a[1], numChannels = _a[2];
                    imgTensor3D = tf.tidy(function () { return imgTensor.as3D(height, width, numChannels).toInt(); });
                    return [4 /*yield*/, tf.browser.toPixels(imgTensor3D, targetCanvas)];
                case 1:
                    _b.sent();
                    imgTensor3D.dispose();
                    return [2 /*return*/, targetCanvas];
            }
        });
    });
}
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