| /* |
| * Copyright (c) 2017 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "arm_compute/core/Helpers.h" |
| |
| #include "Utils.h" |
| #include "WarpPerspective.h" |
| |
| namespace arm_compute |
| { |
| namespace test |
| { |
| namespace validation |
| { |
| namespace reference |
| { |
| template <typename T> |
| SimpleTensor<T> warp_perspective(const SimpleTensor<T> &src, SimpleTensor<T> &valid_mask, const float *matrix, InterpolationPolicy policy, BorderMode border_mode, uint8_t constant_border_value) |
| { |
| SimpleTensor<T> dst(src.shape(), src.data_type()); |
| |
| // x0 = M00 * x + M01 * y + M02 |
| // y0 = M10 * x + M11 * y + M12 |
| // z0 = M20 * x + M21 * y + M22 |
| // xn = x0 / z0 |
| // yn = y0 / z0 |
| const float M00 = matrix[0]; |
| const float M10 = matrix[1]; |
| const float M20 = matrix[2]; |
| const float M01 = matrix[0 + 1 * 3]; |
| const float M11 = matrix[1 + 1 * 3]; |
| const float M21 = matrix[2 + 1 * 3]; |
| const float M02 = matrix[0 + 2 * 3]; |
| const float M12 = matrix[1 + 2 * 3]; |
| const float M22 = matrix[2 + 2 * 3]; |
| |
| const int width = src.shape().x(); |
| const int height = src.shape().y(); |
| |
| for(int element_idx = 0; element_idx < src.num_elements(); ++element_idx) |
| { |
| valid_mask[element_idx] = 1; |
| Coordinates id = index2coord(src.shape(), element_idx); |
| const int idx = id.x(); |
| const int idy = id.y(); |
| const float z0 = M20 * idx + M21 * idy + M22; |
| |
| const float x0 = (M00 * idx + M01 * idy + M02); |
| const float y0 = (M10 * idx + M11 * idy + M12); |
| |
| const float xn = x0 / z0; |
| const float yn = y0 / z0; |
| id.set(0, static_cast<int>(std::floor(xn))); |
| id.set(1, static_cast<int>(std::floor(yn))); |
| if((0 <= yn) && (yn < height) && (0 <= xn) && (xn < width)) |
| { |
| switch(policy) |
| { |
| case InterpolationPolicy::NEAREST_NEIGHBOR: |
| dst[element_idx] = tensor_elem_at(src, id, border_mode, constant_border_value); |
| break; |
| case InterpolationPolicy::BILINEAR: |
| (valid_bilinear_policy(xn, yn, width, height, border_mode)) ? dst[element_idx] = bilinear_policy(src, id, xn, yn, border_mode, constant_border_value) : valid_mask[element_idx] = 0; |
| break; |
| case InterpolationPolicy::AREA: |
| default: |
| ARM_COMPUTE_ERROR("Interpolation not supported"); |
| break; |
| } |
| } |
| else |
| { |
| if(border_mode == BorderMode::UNDEFINED) |
| { |
| valid_mask[element_idx] = 0; |
| } |
| else |
| { |
| switch(policy) |
| { |
| case InterpolationPolicy::NEAREST_NEIGHBOR: |
| if(border_mode == BorderMode::CONSTANT) |
| { |
| dst[element_idx] = constant_border_value; |
| } |
| else if(border_mode == BorderMode::REPLICATE) |
| { |
| id.set(0, std::max(0, std::min(static_cast<int>(xn), width - 1))); |
| id.set(1, std::max(0, std::min(static_cast<int>(yn), height - 1))); |
| dst[element_idx] = src[coord2index(src.shape(), id)]; |
| } |
| break; |
| case InterpolationPolicy::BILINEAR: |
| dst[element_idx] = bilinear_policy(src, id, xn, yn, border_mode, constant_border_value); |
| break; |
| case InterpolationPolicy::AREA: |
| default: |
| ARM_COMPUTE_ERROR("Interpolation not supported"); |
| break; |
| } |
| } |
| } |
| } |
| return dst; |
| } |
| |
| template SimpleTensor<uint8_t> warp_perspective(const SimpleTensor<uint8_t> &src, SimpleTensor<uint8_t> &valid_mask, const float *matrix, InterpolationPolicy policy, BorderMode border_mode, |
| uint8_t constant_border_value); |
| } // namespace reference |
| } // namespace validation |
| } // namespace test |
| } // namespace arm_compute |