John Richardson | 4268fbe | 2017-08-29 11:22:35 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "IntegralImage.h" |
| 25 | |
| 26 | namespace arm_compute |
| 27 | { |
| 28 | namespace test |
| 29 | { |
| 30 | namespace validation |
| 31 | { |
| 32 | namespace reference |
| 33 | { |
| 34 | template <typename T> |
| 35 | SimpleTensor<uint32_t> integral_image(const SimpleTensor<T> &src) |
| 36 | { |
| 37 | SimpleTensor<uint32_t> dst(src.shape(), DataType::U32); |
| 38 | |
| 39 | // Length of dimensions |
| 40 | const size_t width = src.shape().x(); |
| 41 | const size_t height = src.shape().y(); |
| 42 | const size_t depth = src.shape().total_size_upper(2); |
| 43 | |
| 44 | const size_t image_size = width * height; |
| 45 | |
| 46 | for(size_t z = 0; z < depth; ++z) |
| 47 | { |
| 48 | size_t current_image = z * image_size; |
| 49 | |
| 50 | //First element of each image |
| 51 | dst[current_image] = src[current_image]; |
| 52 | |
| 53 | // First row of each image (add only pixel on the left) |
| 54 | for(size_t x = 1; x < width; ++x) |
| 55 | { |
| 56 | dst[current_image + x] = static_cast<uint32_t>(src[current_image + x]) + dst[current_image + x - 1]; |
| 57 | } |
| 58 | |
| 59 | // Subsequent rows |
| 60 | for(size_t y = 1; y < height; ++y) |
| 61 | { |
| 62 | size_t current_row = current_image + (width * y); |
| 63 | |
| 64 | // First element of each row (add only pixel up) |
| 65 | dst[current_row] = static_cast<uint32_t>(src[current_row]) + dst[current_row - width]; |
| 66 | |
| 67 | // Following row elements |
| 68 | for(size_t x = 1; x < width; ++x) |
| 69 | { |
| 70 | size_t current_pixel = current_row + x; |
| 71 | |
| 72 | // out = in + up(out) + left(out) - up_left(out) |
| 73 | dst[current_pixel] = static_cast<uint32_t>(src[current_pixel]) + dst[current_pixel - 1] |
| 74 | + dst[current_pixel - width] - dst[current_pixel - width - 1]; |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return dst; |
| 80 | } |
| 81 | |
| 82 | template SimpleTensor<uint32_t> integral_image(const SimpleTensor<uint8_t> &src); |
| 83 | } // namespace reference |
| 84 | } // namespace validation |
| 85 | } // namespace test |
| 86 | } // namespace arm_compute |