| /* |
| * Copyright (c) 2016, 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. |
| */ |
| #ifndef __ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ |
| #define __ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ |
| |
| #include "arm_compute/core/NEON/INEKernel.h" |
| |
| #include <cstdint> |
| |
| namespace arm_compute |
| { |
| class IDistribution1D; |
| class ILut; |
| class ITensor; |
| using IImage = ITensor; |
| |
| /** Interface for the cumulative distribution (cummulative summmation) calculation kernel. |
| * |
| * This kernel calculates the cumulative sum of a given distribution (meaning that each output element |
| * is the sum of all its previous elements including itself) and creates a lookup table with the normalized |
| * pixel intensities which is used for improve the constrast of the image. |
| */ |
| class NECumulativeDistributionKernel : public INEKernel |
| { |
| public: |
| /** Default constructor */ |
| NECumulativeDistributionKernel(); |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NECumulativeDistributionKernel(const NECumulativeDistributionKernel &) = delete; |
| /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| NECumulativeDistributionKernel &operator=(const NECumulativeDistributionKernel &) = delete; |
| /** Allow instances of this class to be moved */ |
| NECumulativeDistributionKernel(NECumulativeDistributionKernel &&) = default; |
| /** Allow instances of this class to be moved */ |
| NECumulativeDistributionKernel &operator=(NECumulativeDistributionKernel &&) = default; |
| /** Set the input and output distribution. |
| * |
| * @param[in] input Input image. Data type supported: U8 |
| * @param[in] distribution Unnormalized 256-bin distribution of the input image. |
| * @param[out] cumulative_sum Cummulative distribution (Summed histogram). Should be same size as @p distribution. |
| * @param[out] output Equalization lookup table. Should consist of 256 entries of U8 elements. |
| */ |
| void configure(const IImage *input, const IDistribution1D *distribution, IDistribution1D *cumulative_sum, ILut *output); |
| |
| // Inherited methods overridden: |
| void run(const Window &window, const ThreadInfo &info) override; |
| bool is_parallelisable() const override; |
| |
| private: |
| const IImage *_input; /**< Input image. */ |
| const IDistribution1D *_distribution; /**< Input histogram of the input image. */ |
| IDistribution1D *_cumulative_sum; /**< The cummulative distribution. */ |
| ILut *_output; /**< Output with the equalization lookup table. */ |
| private: |
| static const uint32_t _histogram_size = 256; /**< Default histogram size of 256. */ |
| }; |
| } // namespace arm_compute |
| #endif /*__ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ */ |