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|---|---|---|---|
| 1 | #include "krykov_e_sobel_op/tbb/include/ops_tbb.hpp" | ||
| 2 | |||
| 3 | #include <tbb/tbb.h> | ||
| 4 | |||
| 5 | #include <array> | ||
| 6 | #include <cmath> | ||
| 7 | #include <cstddef> | ||
| 8 | #include <vector> | ||
| 9 | |||
| 10 | #include "krykov_e_sobel_op/common/include/common.hpp" | ||
| 11 | |||
| 12 | namespace krykov_e_sobel_op { | ||
| 13 | |||
| 14 |
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12 | KrykovESobelOpTBB::KrykovESobelOpTBB(const InType &in) { |
| 15 | SetTypeOfTask(GetStaticTypeOfTask()); | ||
| 16 | GetInput() = in; | ||
| 17 | GetOutput().clear(); | ||
| 18 | 12 | } | |
| 19 | |||
| 20 | 12 | bool KrykovESobelOpTBB::ValidationImpl() { | |
| 21 | const auto &img = GetInput(); | ||
| 22 |
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12 | return img.width > 2 && img.height > 2 && static_cast<int>(img.data.size()) == img.width * img.height; |
| 23 | } | ||
| 24 | |||
| 25 | 12 | bool KrykovESobelOpTBB::PreProcessingImpl() { | |
| 26 | const auto &img = GetInput(); | ||
| 27 | |||
| 28 | 12 | width_ = img.width; | |
| 29 | 12 | height_ = img.height; | |
| 30 | |||
| 31 | 12 | grayscale_.resize(static_cast<size_t>(width_) * static_cast<size_t>(height_)); | |
| 32 | // RGB → grayscale | ||
| 33 |
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204 | for (int i = 0; i < width_ * height_; ++i) { |
| 34 | 192 | const Pixel &p = img.data[i]; | |
| 35 | 192 | grayscale_[i] = static_cast<int>((0.299 * p.r) + (0.587 * p.g) + (0.114 * p.b)); | |
| 36 | } | ||
| 37 | 12 | GetOutput().assign(static_cast<size_t>(width_) * static_cast<size_t>(height_), 0); | |
| 38 | 12 | return true; | |
| 39 | } | ||
| 40 | |||
| 41 | 12 | bool KrykovESobelOpTBB::RunImpl() { | |
| 42 | 12 | const std::array<std::array<int, 3>, 3> gx_kernel = {{{-1, 0, 1}, {-2, 0, 2}, {-1, 0, 1}}}; | |
| 43 | 12 | const std::array<std::array<int, 3>, 3> gy_kernel = {{{-1, -2, -1}, {0, 0, 0}, {1, 2, 1}}}; | |
| 44 | |||
| 45 | auto &output = GetOutput(); | ||
| 46 | 12 | const auto &gray = grayscale_; | |
| 47 | 12 | const int h = height_; | |
| 48 | 12 | const int w = width_; | |
| 49 | |||
| 50 | 36 | tbb::parallel_for(tbb::blocked_range<int>(1, h - 1), [&](const tbb::blocked_range<int> &range) { | |
| 51 |
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48 | for (int row = range.begin(); row != range.end(); ++row) { |
| 52 |
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72 | for (int col = 1; col < w - 1; ++col) { |
| 53 | int gx = 0; | ||
| 54 | int gy = 0; | ||
| 55 | |||
| 56 |
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192 | for (int ky = -1; ky <= 1; ++ky) { |
| 57 |
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576 | for (int kx = -1; kx <= 1; ++kx) { |
| 58 | 432 | int pixel = gray[((row + ky) * w) + (col + kx)]; | |
| 59 | 432 | gx += pixel * gx_kernel.at(ky + 1).at(kx + 1); | |
| 60 | 432 | gy += pixel * gy_kernel.at(ky + 1).at(kx + 1); | |
| 61 | } | ||
| 62 | } | ||
| 63 | |||
| 64 | 48 | int magnitude = static_cast<int>(std::sqrt(static_cast<double>((gx * gx) + (gy * gy)))); | |
| 65 | 48 | output[(row * w) + col] = magnitude; | |
| 66 | } | ||
| 67 | } | ||
| 68 | 24 | }); | |
| 69 | |||
| 70 | 12 | return true; | |
| 71 | } | ||
| 72 | |||
| 73 | 12 | bool KrykovESobelOpTBB::PostProcessingImpl() { | |
| 74 | 12 | return true; | |
| 75 | } | ||
| 76 | |||
| 77 | } // namespace krykov_e_sobel_op | ||
| 78 |