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eigen/unsupported/test/cxx11_tensor_image_patch.cpp

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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
#include <Eigen/CXX11/Tensor>
using Eigen::Tensor;
void test_simple_patch()
{
Tensor<float, 4> tensor(2,3,5,7);
tensor.setRandom();
Tensor<float, 4, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(3));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(3), tensor_row_major.dimension(0));
// Single pixel patch: ColMajor
Tensor<float, 5> single_pixel_patch;
single_pixel_patch = tensor.extract_image_patches(1, 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(0), 2);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(1), 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(2), 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(3), 3*5);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(4), 7);
// Single pixel patch: RowMajor
Tensor<float, 5, RowMajor> single_pixel_patch_row_major;
single_pixel_patch_row_major = tensor_row_major.extract_image_patches(1, 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(0), 7);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(1), 3*5);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(2), 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(3), 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(4), 2);
for (int i = 0; i < tensor.size(); ++i) {
// ColMajor
if (tensor.data()[i] != single_pixel_patch.data()[i]) {
std::cout << "Mismatch detected at index " << i << " : "
<< tensor.data()[i] << " vs " << single_pixel_patch.data()[i]
<< std::endl;
}
VERIFY_IS_EQUAL(single_pixel_patch.data()[i], tensor.data()[i]);
// RowMajor
if (tensor_row_major.data()[i] != single_pixel_patch_row_major.data()[i]) {
std::cout << "Mismatch detected at index " << i << " : "
<< tensor.data()[i] << " vs "
<< single_pixel_patch_row_major.data()[i] << std::endl;
}
VERIFY_IS_EQUAL(single_pixel_patch_row_major.data()[i],
tensor_row_major.data()[i]);
VERIFY_IS_EQUAL(tensor.data()[i], tensor_row_major.data()[i]);
VERIFY_IS_EQUAL(single_pixel_patch.data()[i],
single_pixel_patch_row_major.data()[i]);
}
// Entire image patch: ColMajor
Tensor<float, 5> entire_image_patch;
entire_image_patch = tensor.extract_image_patches(3, 5);
VERIFY_IS_EQUAL(entire_image_patch.dimension(0), 2);
VERIFY_IS_EQUAL(entire_image_patch.dimension(1), 3);
VERIFY_IS_EQUAL(entire_image_patch.dimension(2), 5);
VERIFY_IS_EQUAL(entire_image_patch.dimension(3), 3*5);
VERIFY_IS_EQUAL(entire_image_patch.dimension(4), 7);
// Entire image patch: RowMajor
Tensor<float, 5, RowMajor> entire_image_patch_row_major;
entire_image_patch_row_major = tensor_row_major.extract_image_patches(3, 5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(0), 7);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(1), 3*5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(2), 5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(3), 3);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(4), 2);
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 5; ++j) {
int patchId = i+3*j;
for (int r = 0; r < 3; ++r) {
for (int c = 0; c < 5; ++c) {
for (int d = 0; d < 2; ++d) {
for (int b = 0; b < 7; ++b) {
float expected = 0.0f;
float expected_row_major = 0.0f;
if (r-1+i >= 0 && c-2+j >= 0 && r-1+i < 3 && c-2+j < 5) {
expected = tensor(d, r-1+i, c-2+j, b);
expected_row_major = tensor_row_major(b, c-2+j, r-1+i, d);
}
// ColMajor
if (entire_image_patch(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(entire_image_patch(d, r, c, patchId, b), expected);
// RowMajor
if (entire_image_patch_row_major(b, patchId, c, r, d) !=
expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j
<< " r=" << r << " c=" << c << " d=" << d << " b=" << b
<< std::endl;
}
VERIFY_IS_EQUAL(entire_image_patch_row_major(b, patchId, c, r, d),
expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
// 2D patch: ColMajor
Tensor<float, 5> twod_patch;
twod_patch = tensor.extract_image_patches(2, 2);
VERIFY_IS_EQUAL(twod_patch.dimension(0), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(1), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(2), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(3), 3*5);
VERIFY_IS_EQUAL(twod_patch.dimension(4), 7);
// 2D patch: RowMajor
Tensor<float, 5, RowMajor> twod_patch_row_major;
twod_patch_row_major = tensor_row_major.extract_image_patches(2, 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(0), 7);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(1), 3*5);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(2), 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(3), 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(4), 2);
// Based on the calculation described in TensorTraits.h, padding happens to be 0.
int row_padding = 0;
int col_padding = 0;
int stride = 1;
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 5; ++j) {
int patchId = i+3*j;
for (int r = 0; r < 2; ++r) {
for (int c = 0; c < 2; ++c) {
for (int d = 0; d < 2; ++d) {
for (int b = 0; b < 7; ++b) {
float expected = 0.0f;
float expected_row_major = 0.0f;
int row_offset = r*stride + i - row_padding;
int col_offset = c*stride + j - col_padding;
// ColMajor
if (row_offset >= 0 && col_offset >= 0 && row_offset < tensor.dimension(1) && col_offset < tensor.dimension(2)) {
expected = tensor(d, row_offset, col_offset, b);
}
if (twod_patch(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(twod_patch(d, r, c, patchId, b), expected);
// RowMajor
if (row_offset >= 0 && col_offset >= 0 && row_offset < tensor_row_major.dimension(2) && col_offset < tensor_row_major.dimension(1)) {
expected_row_major = tensor_row_major(b, col_offset, row_offset, d);
}
if (twod_patch_row_major(b, patchId, c, r, d) != expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(twod_patch_row_major(b, patchId, c, r, d), expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
}
// Verifies VALID padding (no padding) with incrementing values.
void test_patch_padding_valid()
{
int input_depth = 3;
int input_rows = 3;
int input_cols = 3;
int input_batches = 1;
int ksize = 2; // Corresponds to the Rows and Cols for tensor.extract_image_patches<>.
int stride = 2; // Only same stride is supported.
Tensor<float, 4> tensor(input_depth, input_rows, input_cols, input_batches);
// Initializes tensor with incrementing numbers.
for (int i = 0; i < tensor.size(); ++i) {
tensor.data()[i] = i + 1;
}
// ColMajor
Tensor<float, 5> result = tensor.extract_image_patches(ksize, ksize, stride, stride, 1, 1, PADDING_VALID);
VERIFY_IS_EQUAL(result.dimension(0), input_depth); // depth
VERIFY_IS_EQUAL(result.dimension(1), ksize); // kernel rows
VERIFY_IS_EQUAL(result.dimension(2), ksize); // kernel cols
VERIFY_IS_EQUAL(result.dimension(3), 1); // number of patches
VERIFY_IS_EQUAL(result.dimension(4), input_batches); // number of batches
// RowMajor
Tensor<float, 4, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(3));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(3), tensor_row_major.dimension(0));
Tensor<float, 5, RowMajor> result_row_major = tensor_row_major.extract_image_patches(ksize, ksize, stride, stride, 1, 1, PADDING_VALID);
VERIFY_IS_EQUAL(result.dimension(0), result_row_major.dimension(4));
VERIFY_IS_EQUAL(result.dimension(1), result_row_major.dimension(3));
VERIFY_IS_EQUAL(result.dimension(2), result_row_major.dimension(2));
VERIFY_IS_EQUAL(result.dimension(3), result_row_major.dimension(1));
VERIFY_IS_EQUAL(result.dimension(4), result_row_major.dimension(0));
// No padding is carried out.
int row_padding = 0;
int col_padding = 0;
for (int i = 0; (i+stride+ksize-1) < input_rows; i += stride) { // input rows
for (int j = 0; (j+stride+ksize-1) < input_cols; j += stride) { // input cols
int patchId = i+input_rows*j;
for (int r = 0; r < ksize; ++r) { // patch rows
for (int c = 0; c < ksize; ++c) { // patch cols
for (int d = 0; d < input_depth; ++d) { // depth
for (int b = 0; b < input_batches; ++b) { // batch
float expected = 0.0f;
float expected_row_major = 0.0f;
int row_offset = r + i - row_padding;
int col_offset = c + j - col_padding;
if (row_offset >= 0 && col_offset >= 0 && row_offset < input_rows && col_offset < input_cols) {
expected = tensor(d, row_offset, col_offset, b);
expected_row_major = tensor_row_major(b, col_offset, row_offset, d);
}
// ColMajor
if (result(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result(d, r, c, patchId, b), expected);
// RowMajor
if (result_row_major(b, patchId, c, r, d) != expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result_row_major(b, patchId, c, r, d), expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
}
// Verifies VALID padding (no padding) with the same value.
void test_patch_padding_valid_same_value()
{
int input_depth = 1;
int input_rows = 5;
int input_cols = 5;
int input_batches = 2;
int ksize = 3; // Corresponds to the Rows and Cols for tensor.extract_image_patches<>.
int stride = 2; // Only same stride is supported.
// ColMajor
Tensor<float, 4> tensor(input_depth, input_rows, input_cols, input_batches);
tensor = tensor.constant(11.0f);
Tensor<float, 5> result = tensor.extract_image_patches(ksize, ksize, stride, stride, 1, 1, PADDING_VALID);
VERIFY_IS_EQUAL(result.dimension(0), input_depth); // depth
VERIFY_IS_EQUAL(result.dimension(1), ksize); // kernel rows
VERIFY_IS_EQUAL(result.dimension(2), ksize); // kernel cols
VERIFY_IS_EQUAL(result.dimension(3), 4); // number of patches
VERIFY_IS_EQUAL(result.dimension(4), input_batches); // number of batches
// RowMajor
Tensor<float, 4, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(3));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(3), tensor_row_major.dimension(0));
Tensor<float, 5, RowMajor> result_row_major = tensor_row_major.extract_image_patches(ksize, ksize, stride, stride, 1, 1, PADDING_VALID);
VERIFY_IS_EQUAL(result.dimension(0), result_row_major.dimension(4));
VERIFY_IS_EQUAL(result.dimension(1), result_row_major.dimension(3));
VERIFY_IS_EQUAL(result.dimension(2), result_row_major.dimension(2));
VERIFY_IS_EQUAL(result.dimension(3), result_row_major.dimension(1));
VERIFY_IS_EQUAL(result.dimension(4), result_row_major.dimension(0));
// No padding is carried out.
int row_padding = 0;
int col_padding = 0;
for (int i = 0; (i+stride+ksize-1) <= input_rows; i += stride) { // input rows
for (int j = 0; (j+stride+ksize-1) <= input_cols; j += stride) { // input cols
int patchId = i+input_rows*j;
for (int r = 0; r < ksize; ++r) { // patch rows
for (int c = 0; c < ksize; ++c) { // patch cols
for (int d = 0; d < input_depth; ++d) { // depth
for (int b = 0; b < input_batches; ++b) { // batch
float expected = 0.0f;
float expected_row_major = 0.0f;
int row_offset = r + i - row_padding;
int col_offset = c + j - col_padding;
if (row_offset >= 0 && col_offset >= 0 && row_offset < input_rows && col_offset < input_cols) {
expected = tensor(d, row_offset, col_offset, b);
expected_row_major = tensor_row_major(b, col_offset, row_offset, d);
}
// ColMajor
if (result(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result(d, r, c, patchId, b), expected);
// RowMajor
if (result_row_major(b, patchId, c, r, d) != expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result_row_major(b, patchId, c, r, d), expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
}
// Verifies SAME padding.
void test_patch_padding_same()
{
int input_depth = 3;
int input_rows = 4;
int input_cols = 2;
int input_batches = 1;
int ksize = 2; // Corresponds to the Rows and Cols for tensor.extract_image_patches<>.
int stride = 2; // Only same stride is supported.
// ColMajor
Tensor<float, 4> tensor(input_depth, input_rows, input_cols, input_batches);
// Initializes tensor with incrementing numbers.
for (int i = 0; i < tensor.size(); ++i) {
tensor.data()[i] = i + 1;
}
Tensor<float, 5> result = tensor.extract_image_patches(ksize, ksize, stride, stride, PADDING_SAME);
VERIFY_IS_EQUAL(result.dimension(0), input_depth); // depth
VERIFY_IS_EQUAL(result.dimension(1), ksize); // kernel rows
VERIFY_IS_EQUAL(result.dimension(2), ksize); // kernel cols
VERIFY_IS_EQUAL(result.dimension(3), 2); // number of patches
VERIFY_IS_EQUAL(result.dimension(4), input_batches); // number of batches
// RowMajor
Tensor<float, 4, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(3));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(3), tensor_row_major.dimension(0));
Tensor<float, 5, RowMajor> result_row_major = tensor_row_major.extract_image_patches(ksize, ksize, stride, stride, PADDING_SAME);
VERIFY_IS_EQUAL(result.dimension(0), result_row_major.dimension(4));
VERIFY_IS_EQUAL(result.dimension(1), result_row_major.dimension(3));
VERIFY_IS_EQUAL(result.dimension(2), result_row_major.dimension(2));
VERIFY_IS_EQUAL(result.dimension(3), result_row_major.dimension(1));
VERIFY_IS_EQUAL(result.dimension(4), result_row_major.dimension(0));
// Based on the calculation described in TensorTraits.h, padding happens to be
// 0.
int row_padding = 0;
int col_padding = 0;
for (int i = 0; (i+stride+ksize-1) <= input_rows; i += stride) { // input rows
for (int j = 0; (j+stride+ksize-1) <= input_cols; j += stride) { // input cols
int patchId = i+input_rows*j;
for (int r = 0; r < ksize; ++r) { // patch rows
for (int c = 0; c < ksize; ++c) { // patch cols
for (int d = 0; d < input_depth; ++d) { // depth
for (int b = 0; b < input_batches; ++b) { // batch
float expected = 0.0f;
float expected_row_major = 0.0f;
int row_offset = r*stride + i - row_padding;
int col_offset = c*stride + j - col_padding;
if (row_offset >= 0 && col_offset >= 0 && row_offset < input_rows && col_offset < input_cols) {
expected = tensor(d, row_offset, col_offset, b);
expected_row_major = tensor_row_major(b, col_offset, row_offset, d);
}
// ColMajor
if (result(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result(d, r, c, patchId, b), expected);
// RowMajor
if (result_row_major(b, patchId, c, r, d) != expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(result_row_major(b, patchId, c, r, d), expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
}
// Verifies that SAME padding, when computed as negative values, will be clipped
// to zero.
void test_patch_padding_same_negative_padding_clip_to_zero() {
int input_depth = 1;
int input_rows = 15;
int input_cols = 1;
int input_batches = 1;
int ksize = 1; // Corresponds to the Rows and Cols for
// tensor.extract_image_patches<>.
int row_stride = 5;
int col_stride = 1;
// ColMajor
Tensor<float, 4> tensor(input_depth, input_rows, input_cols, input_batches);
// Initializes tensor with incrementing numbers.
for (int i = 0; i < tensor.size(); ++i) {
tensor.data()[i] = i + 1;
}
Tensor<float, 5> result = tensor.extract_image_patches(
ksize, ksize, row_stride, col_stride, 1, 1, PADDING_SAME);
// row padding will be computed as -2 originally and then be clipped to 0.
VERIFY_IS_EQUAL(result.coeff(0), 1.0f);
VERIFY_IS_EQUAL(result.coeff(1), 6.0f);
VERIFY_IS_EQUAL(result.coeff(2), 11.0f);
VERIFY_IS_EQUAL(result.dimension(0), input_depth); // depth
VERIFY_IS_EQUAL(result.dimension(1), ksize); // kernel rows
VERIFY_IS_EQUAL(result.dimension(2), ksize); // kernel cols
VERIFY_IS_EQUAL(result.dimension(3), 3); // number of patches
VERIFY_IS_EQUAL(result.dimension(4), input_batches); // number of batches
// RowMajor
Tensor<float, 4, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(3));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(3), tensor_row_major.dimension(0));
Tensor<float, 5, RowMajor> result_row_major =
tensor_row_major.extract_image_patches(ksize, ksize, row_stride,
col_stride, 1, 1, PADDING_SAME);
VERIFY_IS_EQUAL(result_row_major.coeff(0), 1.0f);
VERIFY_IS_EQUAL(result_row_major.coeff(1), 6.0f);
VERIFY_IS_EQUAL(result_row_major.coeff(2), 11.0f);
VERIFY_IS_EQUAL(result.dimension(0), result_row_major.dimension(4));
VERIFY_IS_EQUAL(result.dimension(1), result_row_major.dimension(3));
VERIFY_IS_EQUAL(result.dimension(2), result_row_major.dimension(2));
VERIFY_IS_EQUAL(result.dimension(3), result_row_major.dimension(1));
VERIFY_IS_EQUAL(result.dimension(4), result_row_major.dimension(0));
}
void test_patch_no_extra_dim()
{
Tensor<float, 3> tensor(2,3,5);
tensor.setRandom();
Tensor<float, 3, RowMajor> tensor_row_major = tensor.swap_layout();
VERIFY_IS_EQUAL(tensor.dimension(0), tensor_row_major.dimension(2));
VERIFY_IS_EQUAL(tensor.dimension(1), tensor_row_major.dimension(1));
VERIFY_IS_EQUAL(tensor.dimension(2), tensor_row_major.dimension(0));
// Single pixel patch: ColMajor
Tensor<float, 4> single_pixel_patch;
single_pixel_patch = tensor.extract_image_patches(1, 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(0), 2);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(1), 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(2), 1);
VERIFY_IS_EQUAL(single_pixel_patch.dimension(3), 3*5);
// Single pixel patch: RowMajor
Tensor<float, 4, RowMajor> single_pixel_patch_row_major;
single_pixel_patch_row_major = tensor_row_major.extract_image_patches(1, 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(0), 3*5);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(1), 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(2), 1);
VERIFY_IS_EQUAL(single_pixel_patch_row_major.dimension(3), 2);
for (int i = 0; i < tensor.size(); ++i) {
// ColMajor
if (tensor.data()[i] != single_pixel_patch.data()[i]) {
std::cout << "Mismatch detected at index " << i << " : " << tensor.data()[i] << " vs " << single_pixel_patch.data()[i] << std::endl;
}
VERIFY_IS_EQUAL(single_pixel_patch.data()[i], tensor.data()[i]);
// RowMajor
if (tensor_row_major.data()[i] != single_pixel_patch_row_major.data()[i]) {
std::cout << "Mismatch detected at index " << i << " : "
<< tensor.data()[i] << " vs "
<< single_pixel_patch_row_major.data()[i] << std::endl;
}
VERIFY_IS_EQUAL(single_pixel_patch_row_major.data()[i],
tensor_row_major.data()[i]);
VERIFY_IS_EQUAL(tensor.data()[i], tensor_row_major.data()[i]);
VERIFY_IS_EQUAL(single_pixel_patch.data()[i],
single_pixel_patch_row_major.data()[i]);
}
// Entire image patch: ColMajor
Tensor<float, 4> entire_image_patch;
entire_image_patch = tensor.extract_image_patches(3, 5);
VERIFY_IS_EQUAL(entire_image_patch.dimension(0), 2);
VERIFY_IS_EQUAL(entire_image_patch.dimension(1), 3);
VERIFY_IS_EQUAL(entire_image_patch.dimension(2), 5);
VERIFY_IS_EQUAL(entire_image_patch.dimension(3), 3*5);
// Entire image patch: RowMajor
Tensor<float, 4, RowMajor> entire_image_patch_row_major;
entire_image_patch_row_major = tensor_row_major.extract_image_patches(3, 5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(0), 3*5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(1), 5);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(2), 3);
VERIFY_IS_EQUAL(entire_image_patch_row_major.dimension(3), 2);
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 5; ++j) {
int patchId = i+3*j;
for (int r = 0; r < 3; ++r) {
for (int c = 0; c < 5; ++c) {
for (int d = 0; d < 2; ++d) {
float expected = 0.0f;
float expected_row_major = 0.0f;
if (r-1+i >= 0 && c-2+j >= 0 && r-1+i < 3 && c-2+j < 5) {
expected = tensor(d, r-1+i, c-2+j);
expected_row_major = tensor_row_major(c-2+j, r-1+i, d);
}
// ColMajor
if (entire_image_patch(d, r, c, patchId) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << std::endl;
}
VERIFY_IS_EQUAL(entire_image_patch(d, r, c, patchId), expected);
// RowMajor
if (entire_image_patch_row_major(patchId, c, r, d) !=
expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << std::endl;
}
VERIFY_IS_EQUAL(entire_image_patch_row_major(patchId, c, r, d),
expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
// 2D patch: ColMajor
Tensor<float, 4> twod_patch;
twod_patch = tensor.extract_image_patches(2, 2);
VERIFY_IS_EQUAL(twod_patch.dimension(0), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(1), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(2), 2);
VERIFY_IS_EQUAL(twod_patch.dimension(3), 3*5);
// 2D patch: RowMajor
Tensor<float, 4, RowMajor> twod_patch_row_major;
twod_patch_row_major = tensor_row_major.extract_image_patches(2, 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(0), 3*5);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(1), 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(2), 2);
VERIFY_IS_EQUAL(twod_patch_row_major.dimension(3), 2);
// Based on the calculation described in TensorTraits.h, padding happens to be 0.
int row_padding = 0;
int col_padding = 0;
int stride = 1;
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 5; ++j) {
int patchId = i+3*j;
for (int r = 0; r < 2; ++r) {
for (int c = 0; c < 2; ++c) {
for (int d = 0; d < 2; ++d) {
float expected = 0.0f;
float expected_row_major = 0.0f;
int row_offset = r*stride + i - row_padding;
int col_offset = c*stride + j - col_padding;
// ColMajor
if (row_offset >= 0 && col_offset >= 0 && row_offset < tensor.dimension(1) && col_offset < tensor.dimension(2)) {
expected = tensor(d, row_offset, col_offset);
}
if (twod_patch(d, r, c, patchId) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << std::endl;
}
VERIFY_IS_EQUAL(twod_patch(d, r, c, patchId), expected);
// RowMajor
if (row_offset >= 0 && col_offset >= 0 && row_offset < tensor_row_major.dimension(1) && col_offset < tensor_row_major.dimension(0)) {
expected_row_major = tensor_row_major(col_offset, row_offset, d);
}
if (twod_patch_row_major(patchId, c, r, d) != expected_row_major) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << std::endl;
}
VERIFY_IS_EQUAL(twod_patch_row_major(patchId, c, r, d), expected_row_major);
// Check that ColMajor and RowMajor agree.
VERIFY_IS_EQUAL(expected, expected_row_major);
}
}
}
}
}
}
void test_imagenet_patches()
{
// Test the code on typical configurations used by the 'imagenet' benchmarks at
// https://github.com/soumith/convnet-benchmarks
// ColMajor
Tensor<float, 4> l_in(3, 128, 128, 16);
l_in.setRandom();
Tensor<float, 5> l_out = l_in.extract_image_patches(11, 11);
VERIFY_IS_EQUAL(l_out.dimension(0), 3);
VERIFY_IS_EQUAL(l_out.dimension(1), 11);
VERIFY_IS_EQUAL(l_out.dimension(2), 11);
VERIFY_IS_EQUAL(l_out.dimension(3), 128*128);
VERIFY_IS_EQUAL(l_out.dimension(4), 16);
// RowMajor
Tensor<float, 5, RowMajor> l_out_row_major = l_in.swap_layout().extract_image_patches(11, 11);
VERIFY_IS_EQUAL(l_out_row_major.dimension(0), 16);
VERIFY_IS_EQUAL(l_out_row_major.dimension(1), 128*128);
VERIFY_IS_EQUAL(l_out_row_major.dimension(2), 11);
VERIFY_IS_EQUAL(l_out_row_major.dimension(3), 11);
VERIFY_IS_EQUAL(l_out_row_major.dimension(4), 3);
for (int b = 0; b < 16; ++b) {
for (int i = 0; i < 128; ++i) {
for (int j = 0; j < 128; ++j) {
int patchId = i+128*j;
for (int c = 0; c < 11; ++c) {
for (int r = 0; r < 11; ++r) {
for (int d = 0; d < 3; ++d) {
float expected = 0.0f;
if (r-5+i >= 0 && c-5+j >= 0 && r-5+i < 128 && c-5+j < 128) {
expected = l_in(d, r-5+i, c-5+j, b);
}
// ColMajor
if (l_out(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out(d, r, c, patchId, b), expected);
// RowMajor
if (l_out_row_major(b, patchId, c, r, d) !=
expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j
<< " r=" << r << " c=" << c << " d=" << d << " b=" << b
<< std::endl;
}
VERIFY_IS_EQUAL(l_out_row_major(b, patchId, c, r, d),
expected);
}
}
}
}
}
}
// ColMajor
l_in.resize(16, 64, 64, 32);
l_in.setRandom();
l_out = l_in.extract_image_patches(9, 9);
VERIFY_IS_EQUAL(l_out.dimension(0), 16);
VERIFY_IS_EQUAL(l_out.dimension(1), 9);
VERIFY_IS_EQUAL(l_out.dimension(2), 9);
VERIFY_IS_EQUAL(l_out.dimension(3), 64*64);
VERIFY_IS_EQUAL(l_out.dimension(4), 32);
// RowMajor
l_out_row_major = l_in.swap_layout().extract_image_patches(9, 9);
VERIFY_IS_EQUAL(l_out_row_major.dimension(0), 32);
VERIFY_IS_EQUAL(l_out_row_major.dimension(1), 64*64);
VERIFY_IS_EQUAL(l_out_row_major.dimension(2), 9);
VERIFY_IS_EQUAL(l_out_row_major.dimension(3), 9);
VERIFY_IS_EQUAL(l_out_row_major.dimension(4), 16);
for (int b = 0; b < 32; ++b) {
for (int i = 0; i < 64; ++i) {
for (int j = 0; j < 64; ++j) {
int patchId = i+64*j;
for (int c = 0; c < 9; ++c) {
for (int r = 0; r < 9; ++r) {
for (int d = 0; d < 16; ++d) {
float expected = 0.0f;
if (r-4+i >= 0 && c-4+j >= 0 && r-4+i < 64 && c-4+j < 64) {
expected = l_in(d, r-4+i, c-4+j, b);
}
// ColMajor
if (l_out(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out(d, r, c, patchId, b), expected);
// RowMajor
if (l_out_row_major(b, patchId, c, r, d) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out_row_major(b, patchId, c, r, d), expected);
}
}
}
}
}
}
// ColMajor
l_in.resize(32, 16, 16, 32);
l_in.setRandom();
l_out = l_in.extract_image_patches(7, 7);
VERIFY_IS_EQUAL(l_out.dimension(0), 32);
VERIFY_IS_EQUAL(l_out.dimension(1), 7);
VERIFY_IS_EQUAL(l_out.dimension(2), 7);
VERIFY_IS_EQUAL(l_out.dimension(3), 16*16);
VERIFY_IS_EQUAL(l_out.dimension(4), 32);
// RowMajor
l_out_row_major = l_in.swap_layout().extract_image_patches(7, 7);
VERIFY_IS_EQUAL(l_out_row_major.dimension(0), 32);
VERIFY_IS_EQUAL(l_out_row_major.dimension(1), 16*16);
VERIFY_IS_EQUAL(l_out_row_major.dimension(2), 7);
VERIFY_IS_EQUAL(l_out_row_major.dimension(3), 7);
VERIFY_IS_EQUAL(l_out_row_major.dimension(4), 32);
for (int b = 0; b < 32; ++b) {
for (int i = 0; i < 16; ++i) {
for (int j = 0; j < 16; ++j) {
int patchId = i+16*j;
for (int c = 0; c < 7; ++c) {
for (int r = 0; r < 7; ++r) {
for (int d = 0; d < 32; ++d) {
float expected = 0.0f;
if (r-3+i >= 0 && c-3+j >= 0 && r-3+i < 16 && c-3+j < 16) {
expected = l_in(d, r-3+i, c-3+j, b);
}
// ColMajor
if (l_out(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out(d, r, c, patchId, b), expected);
// RowMajor
if (l_out_row_major(b, patchId, c, r, d) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out_row_major(b, patchId, c, r, d), expected);
}
}
}
}
}
}
// ColMajor
l_in.resize(64, 13, 13, 32);
l_in.setRandom();
l_out = l_in.extract_image_patches(3, 3);
VERIFY_IS_EQUAL(l_out.dimension(0), 64);
VERIFY_IS_EQUAL(l_out.dimension(1), 3);
VERIFY_IS_EQUAL(l_out.dimension(2), 3);
VERIFY_IS_EQUAL(l_out.dimension(3), 13*13);
VERIFY_IS_EQUAL(l_out.dimension(4), 32);
// RowMajor
l_out_row_major = l_in.swap_layout().extract_image_patches(3, 3);
VERIFY_IS_EQUAL(l_out_row_major.dimension(0), 32);
VERIFY_IS_EQUAL(l_out_row_major.dimension(1), 13*13);
VERIFY_IS_EQUAL(l_out_row_major.dimension(2), 3);
VERIFY_IS_EQUAL(l_out_row_major.dimension(3), 3);
VERIFY_IS_EQUAL(l_out_row_major.dimension(4), 64);
for (int b = 0; b < 32; ++b) {
for (int i = 0; i < 13; ++i) {
for (int j = 0; j < 13; ++j) {
int patchId = i+13*j;
for (int c = 0; c < 3; ++c) {
for (int r = 0; r < 3; ++r) {
for (int d = 0; d < 64; ++d) {
float expected = 0.0f;
if (r-1+i >= 0 && c-1+j >= 0 && r-1+i < 13 && c-1+j < 13) {
expected = l_in(d, r-1+i, c-1+j, b);
}
// ColMajor
if (l_out(d, r, c, patchId, b) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out(d, r, c, patchId, b), expected);
// RowMajor
if (l_out_row_major(b, patchId, c, r, d) != expected) {
std::cout << "Mismatch detected at index i=" << i << " j=" << j << " r=" << r << " c=" << c << " d=" << d << " b=" << b << std::endl;
}
VERIFY_IS_EQUAL(l_out_row_major(b, patchId, c, r, d), expected);
}
}
}
}
}
}
}
void test_cxx11_tensor_image_patch()
{
CALL_SUBTEST_1(test_simple_patch());
CALL_SUBTEST_2(test_patch_no_extra_dim());
CALL_SUBTEST_3(test_patch_padding_valid());
CALL_SUBTEST_4(test_patch_padding_valid_same_value());
CALL_SUBTEST_5(test_patch_padding_same());
CALL_SUBTEST_6(test_imagenet_patches());
CALL_SUBTEST_7(test_patch_padding_same_negative_padding_clip_to_zero());
}
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