87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/*
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* Copyright (c) 2017 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "IntegralImage.h"
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namespace arm_compute
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{
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namespace test
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{
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namespace validation
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{
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namespace reference
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{
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template <typename T>
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SimpleTensor<uint32_t> integral_image(const SimpleTensor<T> &src)
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{
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SimpleTensor<uint32_t> dst(src.shape(), DataType::U32);
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// Length of dimensions
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const size_t width = src.shape().x();
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const size_t height = src.shape().y();
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const size_t depth = src.shape().total_size_upper(2);
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const size_t image_size = width * height;
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for(size_t z = 0; z < depth; ++z)
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{
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size_t current_image = z * image_size;
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//First element of each image
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dst[current_image] = src[current_image];
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// First row of each image (add only pixel on the left)
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for(size_t x = 1; x < width; ++x)
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{
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dst[current_image + x] = static_cast<uint32_t>(src[current_image + x]) + dst[current_image + x - 1];
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}
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// Subsequent rows
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for(size_t y = 1; y < height; ++y)
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{
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size_t current_row = current_image + (width * y);
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// First element of each row (add only pixel up)
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dst[current_row] = static_cast<uint32_t>(src[current_row]) + dst[current_row - width];
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// Following row elements
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for(size_t x = 1; x < width; ++x)
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{
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size_t current_pixel = current_row + x;
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// out = in + up(out) + left(out) - up_left(out)
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dst[current_pixel] = static_cast<uint32_t>(src[current_pixel]) + dst[current_pixel - 1]
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+ dst[current_pixel - width] - dst[current_pixel - width - 1];
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}
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}
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}
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return dst;
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}
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template SimpleTensor<uint32_t> integral_image(const SimpleTensor<uint8_t> &src);
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} // namespace reference
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} // namespace validation
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} // namespace test
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} // namespace arm_compute
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