tfjs-model-blazeface/esm/box.js

tfjs model blazeface for local environment

/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import * as tf from '@tensorflow/tfjs-core';
export const disposeBox = (box) => {
    box.startEndTensor.dispose();
    box.startPoint.dispose();
    box.endPoint.dispose();
};
export const createBox = (startEndTensor) => ({
    startEndTensor,
    startPoint: tf.slice(startEndTensor, [0, 0], [-1, 2]),
    endPoint: tf.slice(startEndTensor, [0, 2], [-1, 2])
});
export const scaleBox = (box, factors) => {
    const starts = tf.mul(box.startPoint, factors);
    const ends = tf.mul(box.endPoint, factors);
    const newCoordinates = tf.concat2d([starts, ends], 1);
    return createBox(newCoordinates);
};