91 lines
4.0 KiB
C++
91 lines
4.0 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_CLEQUALIZEHISTOGRAM_H
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#define ARM_COMPUTE_CLEQUALIZEHISTOGRAM_H
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#include "arm_compute/runtime/CL/CLDistribution1D.h"
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#include "arm_compute/runtime/CL/CLLut.h"
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#include "arm_compute/runtime/IFunction.h"
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#include <cstdint>
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#include <memory>
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namespace arm_compute
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{
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class CLCompileContext;
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class CLHistogramKernel;
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class CLHistogramBorderKernel;
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class CLTableLookupKernel;
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class ICLTensor;
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using ICLImage = ICLTensor;
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/** Basic function to execute histogram equalization. This function calls the following CL kernels:
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*
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* -# @ref CLHistogramKernel
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* -# @ref CLTableLookupKernel
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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 CLEqualizeHistogram : public IFunction
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{
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public:
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/** Default Constructor. */
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CLEqualizeHistogram();
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/** Prevent instances of this class from being copied */
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CLEqualizeHistogram(const CLEqualizeHistogram &) = delete;
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/** Prevent instances of this class from being copied */
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CLEqualizeHistogram &operator=(const CLEqualizeHistogram &) = delete;
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/** Default destructor */
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~CLEqualizeHistogram();
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/** Initialise the kernel's inputs.
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*
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* @param[in] input Input image. Data types supported: U8.
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* @param[out] output Output of same data type with equalized brightness and contrast.
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*/
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void configure(const ICLImage *input, ICLImage *output);
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/** Initialise the kernel's inputs.
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*
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* @param[in] compile_context The compile context to be used.
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* @param[in] input Input image. Data types supported: U8.
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* @param[out] output Output of same data type with equalized brightness and contrast.
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*/
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void configure(const CLCompileContext &compile_context, const ICLImage *input, ICLImage *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<CLHistogramKernel> _histogram_kernel; /**< Kernel that calculates the histogram of input. */
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std::unique_ptr<CLHistogramBorderKernel> _border_histogram_kernel; /**< Kernel that calculates the histogram on the borders. */
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std::unique_ptr<CLTableLookupKernel> _map_histogram_kernel; /**< Kernel that maps the input to output using the lut. */
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CLDistribution1D _hist; /**< Distribution that holds the histogram of the input image. */
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CLDistribution1D _cum_dist; /**< Distribution that holds the cummulative distribution of the input histogram. */
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CLLut _cd_lut; /**< Holds the equalization lookuptable. */
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static const uint32_t max_range = 256; /**< Histogram range of the internal histograms. */
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static const uint32_t nr_bins = 256; /**< Histogram bins of the internal histograms. */
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};
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}
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#endif /*ARM_COMPUTE_CLEQUALIZEHISTOGRAM_H */
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