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Diffstat (limited to 'arm_compute/runtime/CL/functions/CLEqualizeHistogram.h')
-rw-r--r-- | arm_compute/runtime/CL/functions/CLEqualizeHistogram.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arm_compute/runtime/CL/functions/CLEqualizeHistogram.h b/arm_compute/runtime/CL/functions/CLEqualizeHistogram.h new file mode 100644 index 0000000000..d7182756b5 --- /dev/null +++ b/arm_compute/runtime/CL/functions/CLEqualizeHistogram.h @@ -0,0 +1,72 @@ +/* + * 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__ */ |