| /* |
| * 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_CLEQUALIZEHISTOGRAM_H__ |
| #define __ARM_COMPUTE_CLEQUALIZEHISTOGRAM_H__ |
| |
| #include "arm_compute/core/CL/kernels/CLHistogramKernel.h" |
| #include "arm_compute/core/CL/kernels/CLTableLookupKernel.h" |
| #include "arm_compute/runtime/CL/CLDistribution1D.h" |
| #include "arm_compute/runtime/CL/CLLut.h" |
| #include "arm_compute/runtime/IFunction.h" |
| |
| #include <cstdint> |
| |
| namespace arm_compute |
| { |
| class ICLTensor; |
| using ICLImage = ICLTensor; |
| |
| /** Basic function to execute histogram equalization. This function calls the following CL kernels: |
| * |
| * -# @ref CLHistogramKernel |
| * -# @ref CLTableLookupKernel |
| * |
| */ |
| class CLEqualizeHistogram : public IFunction |
| { |
| public: |
| /** Default Constructor. */ |
| CLEqualizeHistogram(); |
| /** Initialise the kernel's inputs. |
| * |
| * @param[in] input Input image. Data types supported: U8. |
| * @param[out] output Output of same data type with equalized brightness and contrast. |
| */ |
| void configure(const ICLImage *input, ICLImage *output); |
| |
| // Inherited methods overridden: |
| void run() override; |
| |
| private: |
| CLHistogramKernel _histogram_kernel; /**< Kernel that calculates the histogram of input. */ |
| CLHistogramBorderKernel _border_histogram_kernel; /**< Kernel that calculates the histogram on the borders. */ |
| CLTableLookupKernel _map_histogram_kernel; /**< Kernel that maps the input to output using the lut. */ |
| CLDistribution1D _hist; /**< Distribution that holds the histogram of the input image. */ |
| CLDistribution1D _cum_dist; /**< Distribution that holds the cummulative distribution of the input histogram. */ |
| CLLut _cd_lut; /**< Holds the equalization lookuptable. */ |
| static const uint32_t max_range = 256; /**< Histogram range of the internal histograms. */ |
| static const uint32_t nr_bins = 256; /**< Histogram bins of the internal histograms. */ |
| }; |
| } |
| #endif /*__ARM_COMPUTE_CLEQUALIZEHISTOGRAM_H__ */ |