| /* |
| * 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 "Scale.h" |
| #include "Utils.h" |
| #include "arm_compute/core/utils/misc/utility.h" |
| #include "support/ToolchainSupport.h" |
| |
| namespace arm_compute |
| { |
| namespace test |
| { |
| namespace validation |
| { |
| namespace reference |
| { |
| template <typename T> |
| SimpleTensor<T> scale(const SimpleTensor<T> &in, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, T constant_border_value, |
| SamplingPolicy sampling_policy, bool ceil_policy_scale) |
| { |
| // Add 1 if ceil_policy_scale is true |
| const size_t round_value = ceil_policy_scale ? 1U : 0U; |
| TensorShape shape_scaled(in.shape()); |
| shape_scaled.set(0, (in.shape()[0] + round_value) * scale_x); |
| shape_scaled.set(1, (in.shape()[1] + round_value) * scale_y); |
| SimpleTensor<T> out(shape_scaled, in.data_type()); |
| |
| // Compute the ratio between source width/height and destination width/height |
| const auto wr = static_cast<float>(in.shape()[0]) / static_cast<float>(out.shape()[0]); |
| const auto hr = static_cast<float>(in.shape()[1]) / static_cast<float>(out.shape()[1]); |
| |
| const auto width = static_cast<int>(in.shape().x()); |
| const auto height = static_cast<int>(in.shape().y()); |
| |
| // Determine border size |
| const int border_size = (border_mode == BorderMode::UNDEFINED) ? 0 : 1; |
| |
| // Area interpolation behaves as Nearest Neighbour in case of up-sampling |
| if(policy == InterpolationPolicy::AREA && wr <= 1.f && hr <= 1.f) |
| { |
| policy = InterpolationPolicy::NEAREST_NEIGHBOR; |
| } |
| |
| for(int element_idx = 0, count = 0; element_idx < out.num_elements(); ++element_idx, ++count) |
| { |
| Coordinates id = index2coord(out.shape(), element_idx); |
| int idx = id.x(); |
| int idy = id.y(); |
| float x_src = 0; |
| float y_src = 0; |
| |
| switch(sampling_policy) |
| { |
| case SamplingPolicy::TOP_LEFT: |
| x_src = idx * wr; |
| y_src = idy * hr; |
| break; |
| case SamplingPolicy::CENTER: |
| x_src = (idx + 0.5f) * wr - 0.5f; |
| y_src = (idy + 0.5f) * hr - 0.5f; |
| break; |
| default: |
| ARM_COMPUTE_ERROR("Unsupported sampling policy."); |
| break; |
| } |
| |
| switch(policy) |
| { |
| case InterpolationPolicy::NEAREST_NEIGHBOR: |
| { |
| //Calculate the source coords without -0.5f is equivalent to round the x_scr/y_src coords |
| x_src = (idx + 0.5f) * wr; |
| y_src = (idy + 0.5f) * hr; |
| id.set(0, x_src); |
| id.set(1, y_src); |
| |
| // If coordinates in range of tensor's width or height |
| if(is_valid_pixel_index(x_src, y_src, width, height, border_size)) |
| { |
| out[element_idx] = tensor_elem_at(in, id, border_mode, constant_border_value); |
| } |
| break; |
| } |
| case InterpolationPolicy::BILINEAR: |
| { |
| id.set(0, std::floor(x_src)); |
| id.set(1, std::floor(y_src)); |
| if(is_valid_pixel_index(x_src, y_src, width, height, border_size)) |
| { |
| out[element_idx] = bilinear_policy(in, id, x_src, y_src, border_mode, constant_border_value); |
| } |
| else |
| { |
| if(border_mode == BorderMode::CONSTANT) |
| { |
| out[element_idx] = constant_border_value; |
| } |
| else if(border_mode == BorderMode::REPLICATE) |
| { |
| id.set(0, utility::clamp<int>(x_src, 0, width - 1)); |
| id.set(1, utility::clamp<int>(y_src, 0, height - 1)); |
| out[element_idx] = in[coord2index(in.shape(), id)]; |
| } |
| } |
| break; |
| } |
| case InterpolationPolicy::AREA: |
| { |
| int x_from = std::floor(idx * wr - 0.5f - x_src); |
| int y_from = std::floor(idy * hr - 0.5f - y_src); |
| int x_to = std::ceil((idx + 1) * wr - 0.5f - x_src); |
| int y_to = std::ceil((idy + 1) * hr - 0.5f - y_src); |
| const int xi = std::floor(x_src); |
| const int yi = std::floor(y_src); |
| |
| // Clamp position to borders |
| x_src = std::max(-static_cast<float>(border_size), std::min(x_src, static_cast<float>(width - 1 + border_size))); |
| y_src = std::max(-static_cast<float>(border_size), std::min(y_src, static_cast<float>(height - 1 + border_size))); |
| |
| // Clamp bounding box offsets to borders |
| x_from = ((x_src + x_from) < -border_size) ? -border_size : x_from; |
| y_from = ((y_src + y_from) < -border_size) ? -border_size : y_from; |
| x_to = ((x_src + x_to) >= (width + border_size)) ? (width - 1 + border_size) : x_to; |
| y_to = ((y_src + y_to) >= (height + border_size)) ? (height - 1 + border_size) : y_to; |
| ARM_COMPUTE_ERROR_ON((x_to - x_from + 1) == 0 || (y_to - y_from + 1) == 0); |
| |
| float sum = 0; |
| for(int j = yi + y_from, je = yi + y_to; j <= je; ++j) |
| { |
| for(int i = xi + x_from, ie = xi + x_to; i <= ie; ++i) |
| { |
| id.set(0, static_cast<int>(i)); |
| id.set(1, static_cast<int>(j)); |
| sum += tensor_elem_at(in, id, border_mode, constant_border_value); |
| } |
| } |
| out[element_idx] = sum / ((x_to - x_from + 1) * (y_to - y_from + 1)); |
| |
| break; |
| } |
| default: |
| ARM_COMPUTE_ERROR("Unsupported interpolation mode"); |
| } |
| } |
| |
| return out; |
| } |
| |
| template SimpleTensor<uint8_t> scale(const SimpleTensor<uint8_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, uint8_t constant_border_value, |
| SamplingPolicy sampling_policy, bool ceil_policy_scale); |
| template SimpleTensor<int16_t> scale(const SimpleTensor<int16_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, int16_t constant_border_value, |
| SamplingPolicy sampling_policy, bool ceil_policy_scale); |
| template SimpleTensor<half> scale(const SimpleTensor<half> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, half constant_border_value, |
| SamplingPolicy sampling_policy, bool ceil_policy_scale); |
| template SimpleTensor<float> scale(const SimpleTensor<float> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, float constant_border_value, |
| SamplingPolicy sampling_policy, bool ceil_policy_scale); |
| } // namespace reference |
| } // namespace validation |
| } // namespace test |
| } // namespace arm_compute |