John Richardson | 63e5041 | 2017-10-13 20:51:42 +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 "Phase.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<uint8_t> phase(const SimpleTensor<T> &gx, const SimpleTensor<T> &gy, PhaseType phase_type) |
| 36 | { |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 37 | const float PI = std::atan(1) * 4; |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 38 | SimpleTensor<uint8_t> phase(gx.shape(), DataType::U8); |
| 39 | |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 40 | if(phase_type == PhaseType::UNSIGNED) // unsigned: map to [0-255) |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 41 | { |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 42 | for(int i = 0; i < gx.num_elements(); ++i) |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 43 | { |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 44 | float angle_deg = (std::atan2(float(gy[i]), float(gx[i])) / PI) * 180.0f; |
| 45 | phase[i] = (angle_deg < 0.0f) ? 180.f + angle_deg : angle_deg; |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 46 | } |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 47 | } |
| 48 | else // signed: map to [0-180) degrees |
| 49 | { |
| 50 | for(int i = 0; i < gx.num_elements(); ++i) |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 51 | { |
John Richardson | 9c450cc | 2017-11-22 12:00:41 +0000 | [diff] [blame] | 52 | float angle_pi = std::atan2(gy[i], gx[i]) / PI; |
| 53 | angle_pi = (angle_pi < 0.0f) ? 2 + angle_pi : angle_pi; |
| 54 | phase[i] = lround(angle_pi * 128) & 0xFFu; |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 55 | } |
John Richardson | 63e5041 | 2017-10-13 20:51:42 +0100 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | return phase; |
| 59 | } |
| 60 | |
| 61 | template SimpleTensor<uint8_t> phase(const SimpleTensor<int16_t> &gx, const SimpleTensor<int16_t> &gy, PhaseType phase_type); |
| 62 | template SimpleTensor<uint8_t> phase(const SimpleTensor<int32_t> &gx, const SimpleTensor<int32_t> &gy, PhaseType phase_type); |
| 63 | } // namespace reference |
| 64 | } // namespace validation |
| 65 | } // namespace test |
| 66 | } // namespace arm_compute |