Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Anthony Barbier | e8a4983 | 2018-01-18 10:04:05 +0000 | [diff] [blame] | 2 | * Copyright (c) 2016-2018 ARM Limited. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 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 | #ifndef __ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ |
| 25 | #define __ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ |
| 26 | |
| 27 | #include "arm_compute/core/NEON/INEKernel.h" |
| 28 | |
| 29 | #include <cstdint> |
| 30 | |
| 31 | namespace arm_compute |
| 32 | { |
| 33 | class IDistribution1D; |
| 34 | class ILut; |
| 35 | class ITensor; |
| 36 | using IImage = ITensor; |
| 37 | |
| 38 | /** Interface for the cumulative distribution (cummulative summmation) calculation kernel. |
| 39 | * |
| 40 | * This kernel calculates the cumulative sum of a given distribution (meaning that each output element |
| 41 | * is the sum of all its previous elements including itself) and creates a lookup table with the normalized |
| 42 | * pixel intensities which is used for improve the constrast of the image. |
| 43 | */ |
| 44 | class NECumulativeDistributionKernel : public INEKernel |
| 45 | { |
| 46 | public: |
Anthony Barbier | e8a4983 | 2018-01-18 10:04:05 +0000 | [diff] [blame] | 47 | const char *name() const override |
| 48 | { |
| 49 | return "NECumulativeDistributionKernel"; |
| 50 | } |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 51 | /** Default constructor */ |
| 52 | NECumulativeDistributionKernel(); |
| 53 | /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| 54 | NECumulativeDistributionKernel(const NECumulativeDistributionKernel &) = delete; |
| 55 | /** Prevent instances of this class from being copied (As this class contains pointers) */ |
| 56 | NECumulativeDistributionKernel &operator=(const NECumulativeDistributionKernel &) = delete; |
| 57 | /** Allow instances of this class to be moved */ |
| 58 | NECumulativeDistributionKernel(NECumulativeDistributionKernel &&) = default; |
| 59 | /** Allow instances of this class to be moved */ |
| 60 | NECumulativeDistributionKernel &operator=(NECumulativeDistributionKernel &&) = default; |
| 61 | /** Set the input and output distribution. |
| 62 | * |
| 63 | * @param[in] input Input image. Data type supported: U8 |
| 64 | * @param[in] distribution Unnormalized 256-bin distribution of the input image. |
| 65 | * @param[out] cumulative_sum Cummulative distribution (Summed histogram). Should be same size as @p distribution. |
| 66 | * @param[out] output Equalization lookup table. Should consist of 256 entries of U8 elements. |
| 67 | */ |
| 68 | void configure(const IImage *input, const IDistribution1D *distribution, IDistribution1D *cumulative_sum, ILut *output); |
| 69 | |
| 70 | // Inherited methods overridden: |
Moritz Pflanzer | c186b57 | 2017-09-07 09:48:04 +0100 | [diff] [blame] | 71 | void run(const Window &window, const ThreadInfo &info) override; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 72 | bool is_parallelisable() const override; |
| 73 | |
| 74 | private: |
| 75 | const IImage *_input; /**< Input image. */ |
| 76 | const IDistribution1D *_distribution; /**< Input histogram of the input image. */ |
| 77 | IDistribution1D *_cumulative_sum; /**< The cummulative distribution. */ |
| 78 | ILut *_output; /**< Output with the equalization lookup table. */ |
| 79 | private: |
| 80 | static const uint32_t _histogram_size = 256; /**< Default histogram size of 256. */ |
| 81 | }; |
Gian Marco Iodice | 356f643 | 2017-09-22 11:32:21 +0100 | [diff] [blame] | 82 | } // namespace arm_compute |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 83 | #endif /*__ARM_COMPUTE_NECUMULATIVEDISTRIBUTIONKERNEL_H__ */ |