@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
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JavaScript
/**
* @license
* Copyright 2017 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
*
* http://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 '../index';
import { ALL_ENVS, describeWithFlags } from '../jasmine_util';
import { expectArraysClose } from '../test_util';
describeWithFlags('batchNorm4D', ALL_ENVS, () => {
it('simple batchnorm4D, no offset or scale, 2x1x1x2', async () => {
const xT = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const varianceEpsilon = .001;
const result = tf.batchNorm4d(xT, meanT, varianceT, undefined, undefined, varianceEpsilon);
const x = await xT.array();
const mean = await meanT.array();
const variance = await varianceT.array();
expectArraysClose(await result.data(), [
(x[0][0][0][0] - mean[0]) * 1 / Math.sqrt(variance[0] + varianceEpsilon),
(x[0][0][0][1] - mean[1]) * 1 / Math.sqrt(variance[1] + varianceEpsilon),
(x[1][0][0][0] - mean[0]) * 1 / Math.sqrt(variance[0] + varianceEpsilon),
(x[1][0][0][1] - mean[1]) * 1 / Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('simple batchnorm4D, no offset, 2x1x1x2', async () => {
const xT = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm4d(xT, meanT, varianceT, undefined, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const scale = await scaleT.buffer();
expectArraysClose(await result.data(), [
(x.get(0, 0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(0, 0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon),
(x.get(1, 0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(1, 0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm4D, no scale, 2x1x1x2', async () => {
const xT = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm4d(xT, meanT, varianceT, offsetT, undefined, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const offset = await offsetT.buffer();
expectArraysClose(await result.data(), [
offset.get(0) +
(x.get(0, 0, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(0, 0, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon),
offset.get(0) +
(x.get(1, 0, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(1, 0, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm4D, 2x1x1x2', async () => {
const xT = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([3, 4]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm4d(xT, meanT, varianceT, offsetT, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const scale = await scaleT.buffer();
const offset = await offsetT.buffer();
expectArraysClose(await result.data(), [
offset.get(0) +
(x.get(0, 0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(0, 0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon),
offset.get(0) +
(x.get(1, 0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(1, 0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('accepts a tensor-like object', async () => {
const x = [[[[2, 4]]], [[[9, 23]]]]; // 2x1x1x2
const mean = [1, 2];
const variance = [2, 3];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const result = tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon);
expectArraysClose(await result.data(), [
offset[0] +
(x[0][0][0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[0][0][0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon),
offset[0] +
(x[1][0][0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[1][0][0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('simple batchnorm4D gradients, 2x1x1x2', async () => {
const x = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const offset = tf.tensor1d([3, 4]);
const scale = tf.tensor1d([2, 5]);
const varianceEpsilon = .001;
const dy = tf.tensor4d([-1, -1, -1, -1], [2, 1, 1, 2]);
const gradX = tf.grad((x) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(x, dy);
expectArraysClose(await gradX.data(), [-1.414, -2.887, -1.414, -2.887]);
expect(gradX.shape).toEqual([2, 1, 1, 2]);
const gradMean = tf.grad((mean) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(mean, dy);
expectArraysClose(await gradMean.data(), [2.828, 5.773]);
expect(gradMean.shape).toEqual([2]);
const gradVariance = tf.grad((variance) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(variance, dy);
expectArraysClose(await gradVariance.data(), [3.180, 11.060]);
expect(gradVariance.shape).toEqual([2]);
const gradOffset = tf.grad((offset) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(offset, dy);
expectArraysClose(await gradOffset.data(), await dy.sum([0, 1, 2]).data());
expect(gradOffset.shape).toEqual([2]);
const gradScale = tf.grad((scale) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(scale, dy);
expectArraysClose(await gradScale.data(), [-6.362, -13.277]);
expect(gradScale.shape).toEqual([2]);
});
it('batchnorm4D gradients, same shapes in x, mean and variance', async () => {
const x = tf.tensor4d([10, 20, 30, 40], [2, 1, 1, 2]);
const mean = tf.tensor4d([0, 5, 10, 15], [2, 1, 1, 2]);
const variance = tf.tensor4d([2, 4, 6, 8], [2, 1, 1, 2]);
const scale = tf.tensor4d([2, 5, 2, 5], [2, 1, 1, 2]);
const offset = tf.tensor4d([0, 0, 0, 0], [2, 1, 1, 2]);
const varianceEpsilon = .001;
const dy = tf.tensor4d([-1, -1, -1, -1], [2, 1, 1, 2]);
const gradX = tf.grad((x) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(x, dy);
expectArraysClose(await gradX.data(), [-1.414, -2.500, -0.816, -1.768]);
expect(gradX.shape).toEqual([2, 1, 1, 2]);
const gradMean = tf.grad((mean) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(mean, dy);
expectArraysClose(await gradMean.data(), [1.414, 2.500, 0.816, 1.768]);
expect(gradMean.shape).toEqual([2, 1, 1, 2]);
const gradVariance = tf.grad((variance) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(variance, dy);
expectArraysClose(await gradVariance.data(), [3.533, 4.686, 1.360, 2.762]);
expect(gradVariance.shape).toEqual([2, 1, 1, 2]);
const gradOffset = tf.grad((offset) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(offset, dy);
expectArraysClose(await gradOffset.data(), await dy.data());
expect(gradOffset.shape).toEqual([2, 1, 1, 2]);
const gradScale = tf.grad((scale) => tf.batchNorm4d(x, mean, variance, offset, scale, varianceEpsilon))(scale, dy);
expectArraysClose(await gradScale.data(), [-7.069, -7.499, -8.164, -8.838]);
expect(gradScale.shape).toEqual([2, 1, 1, 2]);
});
});
describeWithFlags('batchNorm3D', ALL_ENVS, () => {
it('simple batchnorm3D, no offset or scale, 2x1x2', async () => {
const xT = tf.tensor3d([2, 4, 9, 23], [2, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(xT, meanT, varianceT, undefined, undefined, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
expectArraysClose(await result.data(), [
(x.get(0, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(0, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon),
(x.get(1, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(1, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm3D, no offset, 2x1x2', async () => {
const xT = tf.tensor3d([2, 4, 9, 23], [2, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(xT, meanT, varianceT, undefined, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const scale = await scaleT.buffer();
expectArraysClose(await result.data(), [
(x.get(0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon),
(x.get(1, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(1, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm3D, no scale, 2x1x2', async () => {
const xT = tf.tensor3d([2, 4, 9, 23], [2, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(xT, meanT, varianceT, offsetT, undefined, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const offset = await offsetT.buffer();
expectArraysClose(await result.data(), [
offset.get(0) +
(x.get(0, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(0, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon),
offset.get(0) +
(x.get(1, 0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(1, 0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm3D, 2x1x2', async () => {
const xT = tf.tensor3d([2, 4, 9, 23], [2, 1, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([3, 4]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(xT, meanT, varianceT, offsetT, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const offset = await offsetT.buffer();
const scale = await scaleT.buffer();
expectArraysClose(await result.data(), [
offset.get(0) +
(x.get(0, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(0, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon),
offset.get(0) +
(x.get(1, 0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
offset.get(1) +
(x.get(1, 0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('accepts a tensor-like object', async () => {
const x = [[[2, 4]], [[9, 23]]]; // 2x1x2
const mean = [1, 2];
const variance = [2, 3];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const result = tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon);
expectArraysClose(await result.data(), [
offset[0] +
(x[0][0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[0][0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon),
offset[0] +
(x[1][0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[1][0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('batchnorm3D, x,mean,var,offset,scale are all 3D', async () => {
const shape = [2, 1, 2];
const xT = tf.tensor3d([2, 4, 9, 23], shape);
const meanT = tf.tensor3d([1, 2, 3, 4], shape);
const varianceT = tf.tensor3d([2, 3, 4, 5], shape);
const offsetT = tf.tensor3d([3, 4, 5, 6], shape);
const scaleT = tf.tensor3d([4, 5, 6, 7], shape);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(xT, meanT, varianceT, offsetT, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const offset = await offsetT.buffer();
const scale = await scaleT.buffer();
expectArraysClose(await result.data(), [
offset.get(0, 0, 0) +
(x.get(0, 0, 0) - mean.get(0, 0, 0)) * scale.get(0, 0, 0) /
Math.sqrt(variance.get(0, 0, 0) + varianceEpsilon),
offset.get(0, 0, 1) +
(x.get(0, 0, 1) - mean.get(0, 0, 1)) * scale.get(0, 0, 1) /
Math.sqrt(variance.get(0, 0, 1) + varianceEpsilon),
offset.get(1, 0, 0) +
(x.get(1, 0, 0) - mean.get(1, 0, 0)) * scale.get(1, 0, 0) /
Math.sqrt(variance.get(1, 0, 0) + varianceEpsilon),
offset.get(1, 0, 1) +
(x.get(1, 0, 1) - mean.get(1, 0, 1)) * scale.get(1, 0, 1) /
Math.sqrt(variance.get(1, 0, 1) + varianceEpsilon)
]);
});
it('simple batchnorm3D gradients, 2x1x2', async () => {
const x = tf.tensor3d([2, 4, 9, 23], [2, 1, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const offset = tf.tensor1d([3, 4]);
const scale = tf.tensor1d([2, 5]);
const varianceEpsilon = .001;
const dy = tf.tensor3d([1, 1, 1, 1], [2, 1, 2]);
const gradX = tf.grad((x) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(x, dy);
expectArraysClose(await gradX.data(), [1.414, 2.887, 1.414, 2.887]);
expect(gradX.shape).toEqual([2, 1, 2]);
const gradMean = tf.grad((mean) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(mean, dy);
expectArraysClose(await gradMean.data(), [-2.828, -5.773]);
expect(gradMean.shape).toEqual([2]);
const gradVariance = tf.grad((variance) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(variance, dy);
expectArraysClose(await gradVariance.data(), [-3.180, -11.060]);
expect(gradVariance.shape).toEqual([2]);
const gradOffset = tf.grad((offset) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(offset, dy);
expectArraysClose(await gradOffset.data(), [2, 2]);
expect(gradOffset.shape).toEqual([2]);
const gradScale = tf.grad((scale) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(scale, dy);
expectArraysClose(await gradScale.data(), [6.362, 13.277]);
expect(gradScale.shape).toEqual([2]);
});
it('batchnorm3D gradients, same shapes in x, mean and variance', async () => {
const x = tf.tensor3d([10, 20, 30, 40], [2, 1, 2]);
const mean = tf.tensor3d([0, 5, 10, 15], [2, 1, 2]);
const variance = tf.tensor3d([2, 4, 6, 8], [2, 1, 2]);
const scale = tf.tensor3d([2, 5, 2, 5], [2, 1, 2]);
const offset = tf.tensor3d([0, 0, 0, 0], [2, 1, 2]);
const varianceEpsilon = .001;
const dy = tf.tensor3d([1, 1, 1, 1], [2, 1, 2]);
const gradX = tf.grad((x) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(x, dy);
expectArraysClose(await gradX.data(), [1.414, 2.500, 0.816, 1.768]);
expect(gradX.shape).toEqual([2, 1, 2]);
const gradMean = tf.grad((mean) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(mean, dy);
expectArraysClose(await gradMean.data(), [-1.414, -2.500, -0.816, -1.768]);
expect(gradMean.shape).toEqual([2, 1, 2]);
const gradVariance = tf.grad((variance) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(variance, dy);
expectArraysClose(await gradVariance.data(), [-3.533, -4.686, -1.360, -2.762]);
expect(gradVariance.shape).toEqual([2, 1, 2]);
const gradOffset = tf.grad((offset) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(offset, dy);
expectArraysClose(await gradOffset.data(), [1, 1, 1, 1]);
expect(gradOffset.shape).toEqual([2, 1, 2]);
const gradScale = tf.grad((scale) => tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon))(scale, dy);
expectArraysClose(await gradScale.data(), [7.069, 7.499, 8.164, 8.838]);
expect(gradScale.shape).toEqual([2, 1, 2]);
});
it('batchnorm matches tensorflow, 2x3x3', async () => {
const x = tf.tensor3d([
0.49955603, 0.04158615, -1.09440524, 2.03854165, -0.61578344,
2.87533573, 1.18105987, 0.807462, 1.87888837, 2.26563962, -0.37040935,
1.35848753, -0.75347094, 0.15683117, 0.91925946, 0.34121279,
0.92717143, 1.89683965
], [2, 3, 3]);
const mean = tf.tensor1d([0.39745062, -0.48062894, 0.4847822]);
const variance = tf.tensor1d([0.32375343, 0.67117643, 1.08334653]);
const offset = tf.tensor1d([0.69398749, -1.29056387, 0.9429723]);
const scale = tf.tensor1d([-0.5607271, 0.9878457, 0.25181573]);
const varianceEpsilon = .001;
const result = tf.batchNorm3d(x, mean, variance, offset, scale, varianceEpsilon);
expectArraysClose(await result.data(), [
0.59352049, -0.66135202, 0.5610874, -0.92077015, -1.45341019, 1.52106473,
-0.07704776, 0.26144429, 1.28010017, -1.14422404, -1.15776136, 1.15425493,
1.82644104, -0.52249442, 1.04803919, 0.74932291, 0.40568101, 1.2844412
]);
});
});
describeWithFlags('batchNorm2D', ALL_ENVS, () => {
it('simple batchnorm2D, no offset or scale, 2x2', async () => {
const xT = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const varianceEpsilon = .001;
const result = tf.batchNorm2d(xT, meanT, varianceT, undefined, undefined, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
expectArraysClose(await result.data(), [
(x.get(0, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(0, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon),
(x.get(1, 0) - mean.get(0)) * 1 /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(1, 1) - mean.get(1)) * 1 /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm2D, no offset, 2x2', async () => {
const xT = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm2d(xT, meanT, varianceT, undefined, scaleT, varianceEpsilon);
const x = await xT.buffer();
const mean = await meanT.buffer();
const variance = await varianceT.buffer();
const scale = await scaleT.buffer();
expectArraysClose(await result.data(), [
(x.get(0, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(0, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon),
(x.get(1, 0) - mean.get(0)) * scale.get(0) /
Math.sqrt(variance.get(0) + varianceEpsilon),
(x.get(1, 1) - mean.get(1)) * scale.get(1) /
Math.sqrt(variance.get(1) + varianceEpsilon)
]);
});
it('simple batchnorm2D, no scale, 2x2', async () => {
const xT = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm2d(xT, meanT, varianceT, offsetT, undefined, varianceEpsilon);
const offset = await offsetT.array();
const mean = await meanT.array();
const variance = await varianceT.array();
const x = await xT.array();
expectArraysClose(await result.data(), [
offset[0] +
(x[0][0] - mean[0]) * 1 / Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[0][1] - mean[1]) * 1 / Math.sqrt(variance[1] + varianceEpsilon),
offset[0] +
(x[1][0] - mean[0]) * 1 / Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[1][1] - mean[1]) * 1 / Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('simple batchnorm2D, 2x2', async () => {
const xT = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const meanT = tf.tensor1d([1, 2]);
const varianceT = tf.tensor1d([2, 3]);
const offsetT = tf.tensor1d([3, 4]);
const scaleT = tf.tensor1d([4, 5]);
const varianceEpsilon = .001;
const result = tf.batchNorm2d(xT, meanT, varianceT, offsetT, scaleT, varianceEpsilon);
const offset = await offsetT.array();
const mean = await meanT.array();
const variance = await varianceT.array();
const scale = await scaleT.array();
const x = await xT.array();
expectArraysClose(await result.data(), [
offset[0] +
(x[0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon),
offset[0] +
(x[1][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[1][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('simple batchnorm2D gradients, 2x2', async () => {
const x = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const offset = tf.tensor1d([3, 4]);
const scale = tf.tensor1d([2, 5]);
const varianceEpsilon = .001;
const dy = tf.tensor2d([1, 1, 1, 1], [2, 2]);
const [gradX, gradMean, gradVariance, gradOffset, gradScale] = tf.grads((x, mean, variance, offset, scale) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))([x, mean, variance, offset, scale], dy);
expectArraysClose(await gradX.data(), [1.414, 2.887, 1.414, 2.887]);
expect(gradX.shape).toEqual([2, 2]);
expectArraysClose(await gradMean.data(), [-2.828, -5.773]);
expect(gradMean.shape).toEqual([2]);
expectArraysClose(await gradVariance.data(), [-3.180, -11.060]);
expect(gradVariance.shape).toEqual([2]);
expectArraysClose(await gradOffset.data(), [2, 2]);
expect(gradOffset.shape).toEqual([2]);
expectArraysClose(await gradScale.data(), [6.362, 13.277]);
expect(gradScale.shape).toEqual([2]);
});
it('gradient with clones batchnorm2D', async () => {
const x = tf.tensor2d([2, 4, 9, 23], [2, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const offset = tf.tensor1d([3, 4]);
const scale = tf.tensor1d([2, 5]);
const varianceEpsilon = .001;
const dy = tf.tensor2d([1, 1, 1, 1], [2, 2]);
const [gradX, gradMean, gradVariance, gradOffset, gradScale] = tf.grads((x, mean, variance, offset, scale) => tf.batchNorm2d(x.clone(), mean.clone(), variance.clone(), offset.clone(), scale.clone(), varianceEpsilon)
.clone())([x, mean, variance, offset, scale], dy);
expectArraysClose(await gradX.data(), [1.414, 2.887, 1.414, 2.887]);
expect(gradX.shape).toEqual([2, 2]);
expectArraysClose(await gradMean.data(), [-2.828, -5.773]);
expect(gradMean.shape).toEqual([2]);
expectArraysClose(await gradVariance.data(), [-3.180, -11.060]);
expect(gradVariance.shape).toEqual([2]);
expectArraysClose(await gradOffset.data(), [2, 2]);
expect(gradOffset.shape).toEqual([2]);
expectArraysClose(await gradScale.data(), [6.362, 13.277]);
expect(gradScale.shape).toEqual([2]);
});
it('batchnorm2D gradients, same shapes in x, mean and variance', async () => {
const x = tf.tensor2d([10, 20, 30, 40], [2, 2]);
const mean = tf.tensor2d([0, 5, 10, 15], [2, 2]);
const variance = tf.tensor2d([2, 4, 6, 8], [2, 2]);
const scale = tf.tensor2d([2, 5, 2, 5], [2, 2]);
const offset = tf.tensor2d([0, 0, 0, 0], [2, 2]);
const varianceEpsilon = .001;
const dy = tf.tensor2d([1, 1, 1, 1], [2, 2]);
const gradX = tf.grad((x) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))(x, dy);
expectArraysClose(await gradX.data(), [1.414, 2.500, 0.816, 1.768]);
expect(gradX.shape).toEqual([2, 2]);
const gradMean = tf.grad((mean) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))(mean, dy);
expectArraysClose(await gradMean.data(), [-1.414, -2.500, -0.816, -1.768]);
expect(gradMean.shape).toEqual([2, 2]);
const gradVariance = tf.grad((variance) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))(variance, dy);
expectArraysClose(await gradVariance.data(), [-3.533, -4.686, -1.360, -2.762]);
expect(gradVariance.shape).toEqual([2, 2]);
const gradOffset = tf.grad((offset) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))(offset, dy);
expectArraysClose(await gradOffset.data(), [1, 1, 1, 1]);
expect(gradOffset.shape).toEqual([2, 2]);
const gradScale = tf.grad((scale) => tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon))(scale, dy);
expectArraysClose(await gradScale.data(), [7.069, 7.499, 8.164, 8.838]);
expect(gradScale.shape).toEqual([2, 2]);
});
it('gradient with clones', () => {
const x = tf.zeros([2, 2]);
const mean = tf.zeros([2, 2]);
const variance = tf.zeros([2, 2]);
const scale = tf.zeros([2, 2]);
const offset = tf.zeros([2, 2]);
const varianceEpsilon = .001;
const gradF = tf.grads((x, mean, variance, offset, scale) => tf.batchNorm2d(x.clone(), mean.clone(), variance.clone(), offset.clone(), scale.clone(), varianceEpsilon)
.clone());
const [gradX, gradMean, gradVariance, gradOffset, gradScale] = gradF([x, mean, variance, offset, scale]);
expect(gradX.shape).toEqual(x.shape);
expect(gradMean.shape).toEqual(mean.shape);
expect(gradVariance.shape).toEqual(variance.shape);
expect(gradOffset.shape).toEqual(offset.shape);
expect(gradScale.shape).toEqual(scale.shape);
});
it('batchnorm2D matches tensorflow, 3x3', async () => {
const x = tf.tensor2d([
0.3136892, 0.92389025, 0.594782, 0.05021042, 0.67545404, 0.93910035,
0.13277993, 0.96474269, 0.88608916
], [3, 3]);
const mean = tf.tensor1d([0.19526312, 0.74857256, 0.45166398]);
const variance = tf.tensor1d([0.22963001, 0.61521992, 0.46623685]);
const offset = tf.tensor1d([0.43098484, 0.77712237, 0.47916298]);
const scale = tf.tensor1d([0.62186907, 0.85673736, 0.19201061]);
const varianceEpsilon = .001;
const result = tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon);
expectArraysClose(await result.data(), [
0.58433646, 0.96846228, 0.51936529, 0.24315402, 0.69732157, 0.61608542,
0.35007446, 1.01304821, 0.60119441
]);
});
it('throws when passed x as a non-tensor', () => {
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
expect(() => tf.batchNorm({}, mean, variance))
.toThrowError(/Argument 'x' passed to 'batchNorm' must be a Tensor/);
});
it('throws when passed mean as a non-tensor', () => {
const x = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const variance = tf.tensor1d([2, 3]);
expect(() => tf.batchNorm(x, {}, variance))
.toThrowError(/Argument 'mean' passed to 'batchNorm' must be a Tensor/);
});
it('throws when passed variance as a non-tensor', () => {
const x = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const mean = tf.tensor1d([1, 2]);
const e = /Argument 'variance' passed to 'batchNorm' must be a Tensor/;
expect(() => tf.batchNorm(x, mean, {})).toThrowError(e);
});
it('throws when passed scale as a non-tensor', () => {
const x = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const epsilon = .001;
expect(() => tf.batchNorm(x, mean, variance, epsilon, {}))
.toThrowError(/Argument 'scale' passed to 'batchNorm' must be a Tensor/);
});
it('throws when passed offset as a non-tensor', () => {
const x = tf.tensor4d([2, 4, 9, 23], [2, 1, 1, 2]);
const mean = tf.tensor1d([1, 2]);
const variance = tf.tensor1d([2, 3]);
const epsilon = .001;
const scale = tf.tensor1d([0.62186907, 0.85673736, 0.19201061]);
const e = /Argument 'offset' passed to 'batchNorm' must be a Tensor/;
expect(() => tf.batchNorm(x, mean, variance, {}, scale, epsilon))
.toThrowError(e);
});
it('accepts a tensor-like object', async () => {
const x = [[2, 4], [9, 23]];
const mean = [1, 2];
const variance = [2, 3];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const result = tf.batchNorm2d(x, mean, variance, offset, scale, varianceEpsilon);
expectArraysClose(await result.data(), [
offset[0] +
(x[0][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[0][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon),
offset[0] +
(x[1][0] - mean[0]) * scale[0] /
Math.sqrt(variance[0] + varianceEpsilon),
offset[1] +
(x[1][1] - mean[1]) * scale[1] /
Math.sqrt(variance[1] + varianceEpsilon)
]);
});
it('throws error when x is a string tensor', () => {
const mean = [1, 2];
const variance = [2, 3];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const f = () => tf.batchNorm2d([['a', 'b'], ['c', 'd']], mean, variance, offset, scale, varianceEpsilon);
expect(f).toThrowError(/Argument 'x' passed to 'batchNorm' must be numeric/);
});
it('throws error when mean is a string tensor', () => {
const x = [[2, 4], [9, 23]];
const variance = [2, 3];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const f = () => tf.batchNorm2d(x, ['a', 'b'], variance, offset, scale, varianceEpsilon);
expect(f).toThrowError(/Argument 'mean' passed to 'batchNorm' must be numeric/);
});
it('throws error when variance is a string tensor', () => {
const x = [[2, 4], [9, 23]];
const mean = [1, 2];
const offset = [3, 4];
const scale = [4, 5];
const varianceEpsilon = .001;
const f = () => tf.batchNorm2d(x, mean, ['a', 'b'], offset, scale, varianceEpsilon);
expect(f).toThrowError(/'variance' passed to 'batchNorm' must be numeric/);
});
it('throws error when scale is a string tensor', () => {
const x = [[2, 4], [9, 23]];
const mean = [1, 2];
const variance = [2, 3];
const offset = [3, 4];
const varianceEpsilon = .001;
const f = () => tf.batchNorm2d(x, mean, variance, offset, ['a', 'b'], varianceEpsilon);
expect(f).toThrowError(/'scale' passed to 'batchNorm' must be numeric/);
});
it('throws error when offset is a string tensor', () => {
const x = [[2, 4], [9, 23]];
const mean = [1, 2];
const variance = [2, 3];
const scale = [4, 5];
const varianceEpsilon = .001;
const f = () => tf.batchNorm2d(x, mean, variance, ['a', 'b'], scale, varianceEpsilon);
expect(f).toThrowError(/'offset' passed to 'batchNorm' must be numeric/);
});
});
//# sourceMappingURL=batchnorm_test.js.map