90 lines
4.2 KiB
C++
90 lines
4.2 KiB
C++
/*
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* Copyright (c) 2016-2020 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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#ifndef ARM_COMPUTE_NEEQUALIZEHISTOGRAM_H
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#define ARM_COMPUTE_NEEQUALIZEHISTOGRAM_H
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#include "arm_compute/runtime/Distribution1D.h"
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#include "arm_compute/runtime/IFunction.h"
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#include "arm_compute/runtime/Lut.h"
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#include <cstdint>
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namespace arm_compute
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{
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class ITensor;
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class NEHistogramKernel;
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class NECumulativeDistributionKernel;
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class NETableLookupKernel;
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using IImage = ITensor;
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/** Basic function to execute histogram equalization. This function calls the following NEON kernels:
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*
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* -# @ref NEHistogramKernel
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* -# @ref NECumulativeDistributionKernel
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* -# @ref NETableLookupKernel
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*
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* @deprecated This function is deprecated and is intended to be removed in 21.05 release
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*
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*/
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class NEEqualizeHistogram : public IFunction
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{
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public:
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/** Default Constructor. */
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NEEqualizeHistogram();
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/** Prevent instances of this class from being copied (As this class contains pointers) */
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NEEqualizeHistogram(const NEEqualizeHistogram &) = delete;
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/** Prevent instances of this class from being copied (As this class contains pointers) */
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NEEqualizeHistogram &operator=(const NEEqualizeHistogram &) = delete;
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/** Prevent instances of this class from being moved (As this class contains non movable objects) */
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NEEqualizeHistogram(NEEqualizeHistogram &&) = delete;
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/** Prevent instances of this class from being moved (As this class contains non movable objects) */
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NEEqualizeHistogram &operator=(NEEqualizeHistogram &&) = delete;
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/** Default destructor */
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~NEEqualizeHistogram();
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/** Initialise the kernel's inputs.
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*
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* @note Currently the width of the input image must be a multiple of 16.
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*
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* @param[in] input Input image. Data type supported: U8.
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* @param[out] output Output image. Data type supported: same as @p input
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*/
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void configure(const IImage *input, IImage *output);
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// Inherited methods overridden:
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void run() override;
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private:
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std::unique_ptr<NEHistogramKernel> _histogram_kernel; /**< Kernel that calculates the histogram of input. */
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std::unique_ptr<NECumulativeDistributionKernel> _cd_histogram_kernel; /**< Kernel that calculates the cumulative distribution
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and creates the relevant LookupTable. */
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std::unique_ptr<NETableLookupKernel> _map_histogram_kernel; /**< Kernel that maps the input to output using the lut. */
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Distribution1D _hist; /**< Distribution that holds the histogram of the input image. */
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Distribution1D _cum_dist; /**< Distribution that holds the cummulative distribution of the input histogram. */
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Lut _cd_lut; /**< Holds the equalization lookuptable. */
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static constexpr uint32_t nr_bins{ 256 }; /**< Histogram bins of the internal histograms. */
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static constexpr uint32_t max_range{ nr_bins - 1 }; /**< Histogram range of the internal histograms. */
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};
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}
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#endif /*ARM_COMPUTE_NEEQUALIZEHISTOGRAM_H */
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